A kind of approximately uniform guiding magnetic field system with a gap

Abstract

The present invention relates to the technical field of microwave guiding magnetic fields, and provides a quasi-uniform guiding magnetic field system with gaps for forming a guiding magnetic field inside a drift tube for an electron beam to move. It includes magnetic field unit one, magnetic field unit two, magnetic field unit three, magnetic field unit four, and magnetic field unit five. Magnetic field unit one is arranged on the left side of the drift tube. Magnetic field unit two, magnetic field unit three, magnetic field unit four, and magnetic field unit five are sequentially sleeved on the outer wall of the drift tube at intervals from left to right. By setting five magnetic field units composed of permanent magnets, solenoids, and soft magnets, and the five magnetic field units are arranged at intervals to form gaps, the present invention can not only form a quasi-uniform guiding magnetic field inside the drift tube, but also make full use of the spatial layout of the supporting devices, minimizing the weight, volume, and power consumption of the guiding magnetic field system to the greatest extent, enabling the supporting devices to operate efficiently and stably under a quasi-uniform guiding magnetic field with a magnetic field intensity of about 0.27T generated by it.

Description

Technical Field

[0001] The present invention relates to the technical field of microwave guiding magnetic fields, and more particularly, to a quasi-uniform guiding magnetic field system with a gap. Background Art

[0002] At present, the strong guiding magnetic field systems used in HPM systems limit the practical application of HPM technology. The strong guiding magnetic field systems for guiding the operation of devices include solenoid magnet systems and superconducting magnet systems. The method adopted is to set a solenoid or a permanent magnet on the outer wall of the drift tube for the movement of the electron beam to form a guiding magnetic field for guiding the movement of the electron beam inside the drift tube. These two magnet systems mainly have two defects: huge energy consumption of the magnet system and large volume. Specifically, when the solenoid magnet operates with long pulses or high repetition frequencies, it is necessary to dissipate heat from the magnet through a water cooling system, while the superconducting magnet system requires a huge refrigeration system to ensure that the superconducting coil is at a low temperature of about 4K during operation. Both will cause a large amount of energy consumption. These two magnet systems both include magnets, power supplies, and may also include refrigeration or heat dissipation systems. The system volume is much larger than the size of the HPM generation source itself, which is not conducive to the compact and miniaturized design of the HPM system.

[0003] At the current technical level, there are still scientific and technical difficulties in realizing a magnetic field system with a compact volume and a light weight, and it is difficult to achieve a major breakthrough in the short term. Therefore, reducing the guiding magnetic field intensity of the HPM generation source and enabling it to work effectively under a low magnetic field is conducive to the HPM system to achieve long pulses and high repetition frequencies, and is an important technical route for realizing the compactization and miniaturization of the HPM system. Summary of the Invention

[0004] The purpose of the present invention is to provide a quasi-uniform guiding magnetic field system with a gap to at least overcome the technical problems of the existing strong guiding magnetic field systems, such as large weight and volume, high power consumption, and inability to achieve compact and miniaturized designs.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A quasi-uniform guiding magnetic field system with a gap is used to form a guiding magnetic field inside the drift tube for the movement of the electron beam. The quasi-uniform guiding magnetic field system includes magnetic field unit one, magnetic field unit two, magnetic field unit three, magnetic field unit four, and magnetic field unit five;

[0007] The magnetic field unit one is arranged on the left side of the drift tube; the magnetic field unit two, magnetic field unit three, magnetic field unit four, and magnetic field unit five are sequentially sleeved on the outer wall of the drift tube at intervals from left to right;

[0008] Among them, the magnetic fields generated by the first magnetic field unit, the second magnetic field unit, the third magnetic field unit, the fourth magnetic field unit, and the fifth magnetic field unit are superimposed on each other to form a guiding magnetic field for guiding the movement of the electron beam.

[0009] In some possible embodiments, the first magnetic field unit includes an axially magnetized permanent magnet one, which is arranged on the left side of the drift tube. The axis of the axially magnetized permanent magnet one coincides with the axis of the drift tube, and the magnetization direction of the axially magnetized permanent magnet one points along the axial direction of the drift tube towards the fifth magnetic field unit.

[0010] In some possible embodiments, the second magnetic field unit includes a first soft magnetic cylinder, a first magnet assembly, a second magnet assembly, a third magnet assembly, a fourth magnet assembly, a fifth magnet assembly, a sixth magnet assembly, and a seventh magnet assembly. The first magnet assembly, the second magnet assembly, the third magnet assembly, the fourth magnet assembly, the fifth magnet assembly, the sixth magnet assembly, and the seventh magnet assembly are sequentially arranged inside the first soft magnetic cylinder from left to right;

[0011] The first magnet assembly includes a first axially magnetized permanent magnet ring, a first radially magnetized permanent magnet ring, and a second axially magnetized permanent magnet ring. The first radially magnetized permanent magnet ring is arranged inside the first axially magnetized permanent magnet ring, and the second axially magnetized permanent magnet ring is arranged on the right side of the first axially magnetized permanent magnet ring. The magnetization directions of the first axially magnetized permanent magnet ring and the second axially magnetized permanent magnet ring both point along the axial direction of the drift tube towards the first magnetic field unit, and the magnetization direction of the first radially magnetized permanent magnet ring points radially outward along the drift tube;

[0012] The second magnet assembly includes a first solenoid and a third axially magnetized permanent magnet ring. The third axially magnetized permanent magnet ring is arranged inside the first solenoid, and there is a gap reserved between the third axially magnetized permanent magnet ring and the first solenoid. The magnetization direction of the third axially magnetized permanent magnet ring points along the axial direction of the drift tube towards the first magnetic field unit;

[0013] The third magnet assembly includes a fourth axially magnetized permanent magnet ring, a soft magnetic ring, a fifth axially magnetized permanent magnet ring, and a second radially magnetized permanent magnet ring. The soft magnetic ring, the fifth axially magnetized permanent magnet ring, and the second radially magnetized permanent magnet ring are sequentially arranged inside the fourth axially magnetized permanent magnet ring from left to right. The magnetization directions of the fourth axially magnetized permanent magnet ring and the fifth axially magnetized permanent magnet ring both point along the axial direction of the drift tube towards the first magnetic field unit, and the magnetization direction of the second radially magnetized permanent magnet ring points radially inward along the drift tube;

[0014] The fourth magnet assembly includes a second solenoid and a sixth axially magnetized permanent magnet ring. The sixth axially magnetized permanent magnet ring is disposed inside the second solenoid, and a gap is reserved between the sixth axially magnetized permanent magnet ring and the second solenoid. The magnetization direction of the sixth axially magnetized permanent magnet ring points to the first magnetic field unit along the axis of the drift tube.

[0015] The fifth magnet assembly includes a third radially magnetized permanent magnet ring, a fourth radially magnetized permanent magnet ring, a seventh axially magnetized permanent magnet ring, and a fifth radially magnetized permanent magnet ring. The fourth radially magnetized permanent magnet ring and the seventh axially magnetized permanent magnet ring are sequentially disposed inside the third radially magnetized permanent magnet ring from left to right. The fifth radially magnetized permanent magnet ring is disposed inside the seventh axially magnetized permanent magnet ring. The magnetization directions of the third radially magnetized permanent magnet ring and the fourth radially magnetized permanent magnet ring both point outward along the radius of the drift tube. The magnetization direction of the seventh axially magnetized permanent magnet ring points to the first magnetic field unit along the axis of the drift tube. The magnetization direction of the fifth radially magnetized permanent magnet ring points inward along the radius of the drift tube.

[0016] The sixth magnet assembly includes a third solenoid.

[0017] The seventh magnet assembly includes an eighth axially magnetized permanent magnet ring, a ninth axially magnetized permanent magnet ring, and a sixth radially magnetized permanent magnet ring. The ninth axially magnetized permanent magnet ring is disposed on the right side of the eighth axially magnetized permanent magnet ring. The sixth radially magnetized permanent magnet ring is disposed inside the eighth axially magnetized permanent magnet ring. The magnetization directions of the eighth axially magnetized permanent magnet ring and the ninth axially magnetized permanent magnet ring both point to the first magnetic field unit along the axis of the drift tube. The magnetization direction of the sixth radially magnetized permanent magnet ring points outward along the radius of the drift tube.

[0018] In some possible embodiments, gaps are reserved between the first magnet assembly and the second magnet assembly, between the second magnet assembly and the third magnet assembly, between the third magnet assembly and the fourth magnet assembly, between the fourth magnet assembly and the fifth magnet assembly, between the fifth magnet assembly and the sixth magnet assembly, between the sixth magnet assembly and the seventh magnet assembly, between the first magnet assembly and the first soft magnetic cylinder, between the second magnet assembly and the first soft magnetic cylinder, between the third magnet assembly and the first soft magnetic cylinder, between the fourth magnet assembly and the first soft magnetic cylinder, between the fifth magnet assembly and the first soft magnetic cylinder, between the sixth magnet assembly and the first soft magnetic cylinder, and between the seventh magnet assembly and the first soft magnetic cylinder.

[0019] In some possible embodiments, the third magnetic field unit includes a second soft magnetic cylinder, an eighth magnet assembly, a ninth magnet assembly, a tenth magnet assembly, an eleventh magnet assembly, a twelfth magnet assembly, a thirteenth magnet assembly, and a fourteenth magnet assembly; the eighth magnet assembly, the ninth magnet assembly, the tenth magnet assembly, the eleventh magnet assembly, the twelfth magnet assembly, the thirteenth magnet assembly, and the fourteenth magnet assembly are sequentially arranged inside the second soft magnetic cylinder from left to right;

[0020] The eighth magnet assembly includes a seventh radially magnetized permanent magnet ring, a tenth axially magnetized permanent magnet ring, an eighth radially magnetized permanent magnet ring, and an eleventh axially magnetized permanent magnet ring. The tenth axially magnetized permanent magnet ring is arranged inside the seventh radially magnetized permanent magnet ring. The eighth radially magnetized permanent magnet ring and the eleventh axially magnetized permanent magnet ring are sequentially arranged inside the tenth axially magnetized permanent magnet ring from left to right. The magnetization directions of the seventh radially magnetized permanent magnet ring and the eighth radially magnetized permanent magnet ring both point outward along the radial direction of the drift tube. The magnetization directions of the tenth axially magnetized permanent magnet ring and the eleventh axially magnetized permanent magnet ring both point toward the first magnetic field unit along the axial direction of the drift tube;

[0021] The ninth magnet assembly includes a fourth solenoid;

[0022] The tenth magnet assembly includes a ninth radially magnetized permanent magnet ring, a twelfth axially magnetized permanent magnet ring, a tenth radially magnetized permanent magnet ring, and a thirteenth axially magnetized permanent magnet ring. The twelfth axially magnetized permanent magnet ring is arranged inside the ninth radially magnetized permanent magnet ring. The tenth radially magnetized permanent magnet ring and the thirteenth axially magnetized permanent magnet ring are sequentially arranged inside the twelfth axially magnetized permanent magnet ring from left to right. The magnetization directions of the ninth radially magnetized permanent magnet ring and the tenth radially magnetized permanent magnet ring both point outward along the radial direction of the drift tube. The magnetization directions of the twelfth axially magnetized permanent magnet ring and the thirteenth axially magnetized permanent magnet ring both point toward the first magnetic field unit along the axial direction of the drift tube;

[0023] The eleventh magnet assembly includes a fifth solenoid;

[0024] The twelfth magnet assembly includes an eleventh radially magnetized permanent magnet ring, a fourteenth axially magnetized permanent magnet ring, a twelfth radially magnetized permanent magnet ring, and a fifteenth axially magnetized permanent magnet ring. The fourteenth axially magnetized permanent magnet ring is arranged inside the eleventh radially magnetized permanent magnet ring. The twelfth radially magnetized permanent magnet ring and the fifteenth axially magnetized permanent magnet ring are sequentially arranged inside the fourteenth axially magnetized permanent magnet ring from left to right. The magnetization directions of the eleventh radially magnetized permanent magnet ring and the twelfth radially magnetized permanent magnet ring both point outward along the radial direction of the drift tube. The magnetization directions of the fourteenth axially magnetized permanent magnet ring and the fifteenth axially magnetized permanent magnet ring both point toward the first magnetic field unit along the axial direction of the drift tube;

[0025] The thirteenth magnet assembly includes a sixth solenoid;

[0026] The fourteenth magnet assembly includes a thirteenth radially magnetized permanent magnet ring and a sixteenth axially magnetized permanent magnet ring. The sixteenth axially magnetized permanent magnet ring is disposed inside the thirteenth radially magnetized permanent magnet ring. The magnetization direction of the thirteenth radially magnetized permanent magnet ring points outward along the radial direction of the drift tube, and the magnetization direction of the sixteenth axially magnetized permanent magnet ring points toward the first magnetic field unit along the axial direction of the drift tube.

[0027] In some possible embodiments, gaps are reserved between the eighth magnet assembly and the ninth magnet assembly, between the ninth magnet assembly and the tenth magnet assembly, between the tenth magnet assembly and the eleventh magnet assembly, between the eleventh magnet assembly and the twelfth magnet assembly, between the twelfth magnet assembly and the thirteenth magnet assembly, between the thirteenth magnet assembly and the fourteenth magnet assembly, between the eighth magnet assembly and the second soft magnetic cylinder, between the ninth magnet assembly and the second soft magnetic cylinder, between the tenth magnet assembly and the second soft magnetic cylinder, between the eleventh magnet assembly and the second soft magnetic cylinder, between the twelfth magnet assembly and the second soft magnetic cylinder, between the thirteenth magnet assembly and the second soft magnetic cylinder, and between the fourteenth magnet assembly and the second soft magnetic cylinder.

[0028] In some possible embodiments, the fourth magnetic field unit includes a third soft magnetic cylinder, a fifteenth magnet assembly, a sixteenth magnet assembly, a seventeenth magnet assembly, an eighteenth magnet assembly, and a nineteenth magnet assembly. The fifteenth magnet assembly, the sixteenth magnet assembly, the seventeenth magnet assembly, the eighteenth magnet assembly, and the nineteenth magnet assembly are sequentially disposed inside the third soft magnetic cylinder from left to right.

[0029] The fifteenth magnet assembly includes a fourteenth radially magnetized permanent magnet ring, a fifteenth radially magnetized permanent magnet ring, a sixteenth radially magnetized permanent magnet ring, a seventeenth axially magnetized permanent magnet ring, a seventeenth radially magnetized permanent magnet ring, and an eighteenth axially magnetized permanent magnet ring. The fourteenth radially magnetized permanent magnet ring, the fifteenth radially magnetized permanent magnet ring, and the sixteenth radially magnetized permanent magnet ring are sequentially disposed from left to right. The seventeenth axially magnetized permanent magnet ring is disposed inside the fifteenth radially magnetized permanent magnet ring. The seventeenth radially magnetized permanent magnet ring is disposed inside the seventeenth axially magnetized permanent magnet ring. The eighteenth axially magnetized permanent magnet ring is disposed inside the sixteenth radially magnetized permanent magnet ring. The magnetization directions of the fourteenth radially magnetized permanent magnet ring, the fifteenth radially magnetized permanent magnet ring, and the sixteenth radially magnetized permanent magnet ring all point outward along the radial direction of the drift tube. The magnetization directions of the seventeenth axially magnetized permanent magnet ring and the eighteenth axially magnetized permanent magnet ring both point toward the first magnetic field unit along the axial direction of the drift tube. The magnetization direction of the seventeenth radially magnetized permanent magnet ring points inward along the radial direction of the drift tube.

[0030] The sixteenth magnet assembly includes a seventh solenoid.

[0031] The seventeenth magnet assembly includes an eighteenth radially magnetized permanent magnet ring, a nineteenth radially magnetized permanent magnet ring, a twentieth radially magnetized permanent magnet ring, a nineteenth axially magnetized permanent magnet ring, a twentieth axially magnetized permanent magnet ring, and a twenty-first axially magnetized permanent magnet ring. The eighteenth radially magnetized permanent magnet ring, the nineteenth radially magnetized permanent magnet ring, and the twentieth radially magnetized permanent magnet ring are arranged in sequence from left to right. The nineteenth axially magnetized permanent magnet ring is arranged inside the eighteenth radially magnetized permanent magnet ring. The twentieth axially magnetized permanent magnet ring is arranged inside the nineteenth radially magnetized permanent magnet ring. The twenty-first axially magnetized permanent magnet ring is arranged inside the twentieth radially magnetized permanent magnet ring. The magnetization directions of the eighteenth radially magnetized permanent magnet ring, the nineteenth radially magnetized permanent magnet ring, and the twentieth radially magnetized permanent magnet ring all point outward along the radial direction of the drift tube. The magnetization directions of the nineteenth axially magnetized permanent magnet ring, the twentieth axially magnetized permanent magnet ring, and the twenty-first axially magnetized permanent magnet ring all point toward magnetic field unit one along the axial direction of the drift tube.

[0032] The eighteenth magnet assembly includes an eighth solenoid.

[0033] The nineteenth magnet assembly includes a twenty-first radially magnetized permanent magnet ring, a twenty-second radially magnetized permanent magnet ring, a twenty-third radially magnetized permanent magnet ring, a twenty-second axially magnetized permanent magnet ring, a twenty-third axially magnetized permanent magnet ring, and a twenty-fourth axially magnetized permanent magnet ring. The twenty-first radially magnetized permanent magnet ring, the twenty-second radially magnetized permanent magnet ring, and the twenty-third radially magnetized permanent magnet ring are arranged in sequence from left to right. The twenty-second axially magnetized permanent magnet ring is arranged inside the twenty-first radially magnetized permanent magnet ring. The twenty-third axially magnetized permanent magnet ring is arranged inside the twenty-second radially magnetized permanent magnet ring. The twenty-fourth axially magnetized permanent magnet ring is arranged inside the twenty-third radially magnetized permanent magnet ring. The magnetization directions of the twenty-first radially magnetized permanent magnet ring, the twenty-second radially magnetized permanent magnet ring, and the twenty-third radially magnetized permanent magnet ring all point outward along the radial direction of the drift tube. The magnetization directions of the twenty-second axially magnetized permanent magnet ring, the twenty-third axially magnetized permanent magnet ring, and the twenty-fourth axially magnetized permanent magnet ring all point toward magnetic field unit one along the axial direction of the drift tube.

[0034] In some possible embodiments, gaps are reserved between the fifteenth magnet assembly and the sixteenth magnet assembly, between the sixteenth magnet assembly and the seventeenth magnet assembly, between the seventeenth magnet assembly and the eighteenth magnet assembly, between the eighteenth magnet assembly and the nineteenth magnet assembly, between the fifteenth magnet assembly and the third soft magnetic cylinder, between the sixteenth magnet assembly and the third soft magnetic cylinder, between the seventeenth magnet assembly and the third soft magnetic cylinder, between the eighteenth magnet assembly and the third soft magnetic cylinder, and between the nineteenth magnet assembly and the third soft magnetic cylinder.

[0035] In some possible embodiments, the magnetic field unit five includes a fourth soft magnetic cylinder, a twentieth magnet assembly and a twenty-first magnet assembly, and the twentieth magnet assembly and the twenty-first magnet assembly are sequentially arranged inside the fourth soft magnetic cylinder from left to right;

[0036] The 20th magnet assembly includes a 24th radial magnetization permanent magnet ring, a 25th axial magnetization permanent magnet ring, a 26th axial magnetization permanent magnet ring and a 27th axial magnetization permanent magnet ring, the 25th axial magnetization permanent magnet ring, the 26th axial magnetization permanent magnet ring and the 27th axial magnetization permanent magnet ring are sequentially arranged inside the 24th radial magnetization permanent magnet ring from left to right, the magnetization direction of the 24th radial magnetization permanent magnet ring points to the outside along the radial direction of the drift tube, the magnetization directions of the 25th axial magnetization permanent magnet ring and the 27th axial magnetization permanent magnet ring are both along the axial direction of the drift tube pointing away from the magnetic field unit one, and the magnetization direction of the 26th axial magnetization permanent magnet ring points to the magnetic field unit one along the axial direction of the drift tube;

[0037] The twenty-first magnet assembly includes a twenty-fifth radially magnetized permanent magnet ring and a twenty-eighth axially magnetized permanent magnet ring. The twenty-eighth axially magnetized permanent magnet ring is arranged inside the twenty-fifth radially magnetized permanent magnet ring. The magnetization direction of the twenty-fifth radially magnetized permanent magnet ring points to the outside along the radial direction of the drift tube, and the magnetization direction of the twenty-eighth axially magnetized permanent magnet ring points to the side away from the magnetic field unit one along the axial direction of the drift tube.

[0038] In some possible embodiments, gaps are reserved between the 20th magnet assembly and the 21st magnet assembly, between the 20th magnet assembly and the fourth soft magnetic cylinder, and between the 21st magnet assembly and the fourth soft magnetic cylinder.

[0039] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0040] The quasi-uniform guided magnetic field system with a gap provided by the present invention is provided with five magnetic field units composed of permanent magnets, solenoids and soft magnets, and the five magnetic field units are arranged at intervals to form a gap. It can not only form a quasi-uniform guided magnetic field inside the drift tube, but also make full use of the spatial layout of the supporting components, and reduce the weight, volume and power consumption of the guided magnetic field system to the greatest extent, so that the supporting components can operate efficiently and stably under the quasi-uniform guided magnetic field with a magnetic field strength of about 0.27T generated by the supporting components, and can make the electron beam have a 100% pass rate under the action of the guided magnetic field, ensuring that the electron beam can be transmitted stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic structural diagram of a quasi-uniform guided magnetic field system with a gap provided by the present invention;

[0042] Figure 2 Partial cross-sectional view of the gap-provided quasi-uniform guiding magnetic field system provided by the present invention;

[0043] Figure 3 is Figure 2 an enlarged view of magnetic field unit two in

[0044] Figure 4 is Figure 1 a structural cross-sectional view of magnetic field unit two in

[0045] Figure 5 is Figure 2 an enlarged view of magnetic field unit three in

[0046] Figure 6 is Figure 1 a structural cross-sectional view of magnetic field unit three in

[0047] Figure 7 is Figure 2 an enlarged view of magnetic field unit four in

[0048] Figure 8 is Figure 1 a structural cross-sectional view of magnetic field unit four in

[0049] Figure 9 is Figure 2 an enlarged view of magnetic field unit five in

[0050] Figure 10 is Figure 1 a structural cross-sectional view of magnetic field unit five in

[0051] Figure 11 Axial magnetic field intensity distribution diagram of the guiding magnetic field formed by the gap-provided quasi-uniform guiding magnetic field system provided by the present invention.

[0052] Icon: 100 - magnetic field unit one, 11 - axial magnetization permanent magnet one;

[0053] 200 - Magnetic field unit two, 21 - First soft magnetic cylinder, 22 - First magnet assembly, 221 - First axially magnetized permanent magnet ring, 222 - First radially magnetized permanent magnet ring, 223 - Second axially magnetized permanent magnet ring, 23 - Second magnet assembly, 231 - First solenoid, 232 - Third axially magnetized permanent magnet ring, 24 - Third magnet assembly, 241 - Fourth axially magnetized permanent magnet ring, 242 - Soft magnetic ring, 243 - Fifth axially magnetized permanent magnet ring, 244 - Second radially magnetized permanent magnet ring, 25 - Fourth magnet assembly, 251 - Second solenoid, 252 - Sixth axially magnetized permanent magnet ring, 26 - Fifth magnet assembly, 261 - Third radially magnetized permanent magnet ring, 262 - Fourth radially magnetized permanent magnet ring, 263 - Seventh axially magnetized permanent magnet ring, 264 - Fifth radially magnetized permanent magnet ring, 27 - Sixth magnet assembly, 271 - Third solenoid, 28 - Seventh magnet assembly, 281 - Eighth axially magnetized permanent magnet ring, 282 - Ninth axially magnetized permanent magnet ring, 283 - Sixth radially magnetized permanent magnet ring;

[0054] 300 - Magnetic field unit three, 31 - Second soft magnetic cylinder, 32 - Eighth magnet assembly, 321 - Seventh radially magnetized permanent magnet ring, 322 - Tenth axially magnetized permanent magnet ring, 323 - Eighth radially magnetized permanent magnet ring, 324 - Eleventh axially magnetized permanent magnet ring, 33 - Ninth magnet assembly, 331 - Fourth solenoid, 34 - Tenth magnet assembly, 341 - Ninth radially magnetized permanent magnet ring, 342 - Twelfth axially magnetized permanent magnet ring, 343 - Tenth radially magnetized permanent magnet ring, 344 - Thirteenth axially magnetized permanent magnet ring, 35 - Eleventh magnet assembly, 351 - Fifth solenoid, 36 - Twelfth magnet assembly, 361 - Eleventh radially magnetized permanent magnet ring, 362 - Fourteenth axially magnetized permanent magnet ring, 363 - Twelfth radially magnetized permanent magnet ring, 364 - Fifteenth axially magnetized permanent magnet ring, 37 - Thirteenth magnet assembly, 371 - Sixth solenoid, 38 - Fourteenth magnet assembly, 381 - Thirteenth radially magnetized permanent magnet ring, 382 - Sixteenth axially magnetized permanent magnet ring;

[0055] 400 - Magnetic field unit four, 41 - Third soft magnetic cylinder, 42 - Fifteenth magnet assembly, 421 - Fourteenth radially magnetized permanent magnet ring, 422 - Fifteenth radially magnetized permanent magnet ring, 423 - Sixteenth radially magnetized permanent magnet ring, 424 - Seventeenth axially magnetized permanent magnet ring, 425 - Seventeenth radially magnetized permanent magnet ring, 426 - Eighteenth axially magnetized permanent magnet ring, 43 - Sixteenth magnet assembly, 431 - Seventh solenoid, 44 - Seventeenth magnet assembly, 441 - Eighteenth radially magnetized permanent magnet ring, 442 - Nineteenth radially magnetized permanent magnet ring, 443 - Twentieth radially magnetized permanent magnet ring, 444 - Nineteenth axially magnetized permanent magnet ring, 445 - Twentieth axially magnetized permanent magnet ring, 446 - Twenty - first axially magnetized permanent magnet ring, 45 - Eighteenth magnet assembly, 451 - Eighth solenoid, 46 - Nineteenth magnet assembly, 461 - Twenty - first radially magnetized permanent magnet ring, 462 - Twenty - second radially magnetized permanent magnet ring, 463 - Twenty - third radially magnetized permanent magnet ring, 464 - Twenty - second axially magnetized permanent magnet ring, 465 - Twenty - third axially magnetized permanent magnet ring, 466 - Twenty - fourth axially magnetized permanent magnet ring;

[0056] 500 - Magnetic field unit five, 51 - Fourth soft magnetic cylinder, 52 - Twentieth magnet assembly, 521 - Twenty - fourth radially magnetized permanent magnet ring, 522 - Twenty - fifth axially magnetized permanent magnet ring, 523 - Twenty - sixth axially magnetized permanent magnet ring, 524 - Twenty - seventh axially magnetized permanent magnet ring, 53 - Twenty - first magnet assembly, 531 - Twenty - fifth radially magnetized permanent magnet ring, 532 - Twenty - eighth axially magnetized permanent magnet ring;

[0057] 600 - Drift tube. Specific embodiments

[0058] Please refer to Figures 1 to 11 , this embodiment provides a kind of gap - type quasi - uniform guiding magnetic field system, which is used to form a guiding magnetic field for guiding the movement of an electron beam in a drift tube 600 for the movement of the electron beam, so that the electron beam has a 100% passing rate in the guiding magnetic field formed by the quasi - uniform guiding magnetic field system provided in this embodiment, and the transmission of the electron beam and the operation of related supporting devices are stable.

[0059] Specifically, in combination with Figure 1 shown content, this quasi - uniform guiding magnetic field system includes magnetic field unit one 100, magnetic field unit two 200, magnetic field unit three 300, magnetic field unit four 400 and magnetic field unit five 500.

[0060] In this embodiment, as Figure 1 and Figure 2As shown in the figure, the first magnetic field unit 100 is arranged on the left side of the drift tube 600, and the first magnetic field unit 100 is located outside the drift tube 600. Specifically, the first magnetic field unit 100 is only composed of an axially magnetized permanent magnet 11. The axially magnetized permanent magnet 11 is arranged on the left side of the drift tube 600. At this time, the axis of the axially magnetized permanent magnet 11 coincides with the axis of the drift tube 600, and the magnetization direction of the axially magnetized permanent magnet 11 points along the axis of the drift tube 600 towards the fifth magnetic field unit 500 (i.e., the right side of the drift tube 600, which is also the moving direction of the electron beam). In practical applications, a cathode (not shown in the figure) for generating an electron beam can be arranged at the right end of the axially magnetized permanent magnet 11 (i.e., the end close to the drift tube 600).

[0061] In this embodiment, continue to refer to Figure 1 and Figure 2 , the second magnetic field unit 200, the third magnetic field unit 300, the fourth magnetic field unit 400, and the fifth magnetic field unit 500 are sequentially sleeved on the outer wall of the drift tube 600 at intervals from left to right, and the second magnetic field unit 200, the third magnetic field unit 300, the fourth magnetic field unit 400, and the fifth magnetic field unit 500 are all composed of corresponding permanent magnets, solenoids, and soft magnets. Among them, the magnetic fields generated by the first magnetic field unit 100, the second magnetic field unit 200, the third magnetic field unit 300, the fourth magnetic field unit 400, and the fifth magnetic field unit 500 are superimposed on each other to form a guiding magnetic field for guiding the movement of the electron beam, thereby realizing the stable transmission of the electron beam. And by using multiple spaced magnetic field units to cooperate with each other to form a guiding magnetic field, it is beneficial to reduce the weight, volume, and power consumption of the guiding magnetic field system, thereby realizing the compact and miniaturized design of the guiding magnetic field system.

[0062] In order to more clearly and intuitively understand the quasi-uniform guiding magnetic field system provided in this embodiment, the specific component structures of the second magnetic field unit 200, the third magnetic field unit 300, the fourth magnetic field unit 400, and the fifth magnetic field unit 500 will be further elaborated below. It should be noted that Figure 2 、 Figure 3 、 Figure 5 、 Figure 7 and Figure 9 the direction indicated by the "arrow" shown in is the magnetization direction of the corresponding permanent magnet ring. At the same time, the components with the same hatching in the above figures also refer to the permanent magnet rings with the same magnetization direction or components of the same type.

[0063] Combined with Figure 2As shown in the content, the magnetic field unit 200 in this embodiment includes a first soft magnetic cylinder 21, a first magnet assembly 22, a second magnet assembly 23, a third magnet assembly 24, a fourth magnet assembly 25, a fifth magnet assembly 26, a sixth magnet assembly 27 and a seventh magnet assembly 28. The first magnet assembly 22, the second magnet assembly 23, the third magnet assembly 24, the fourth magnet assembly 25, the fifth magnet assembly 26, the sixth magnet assembly 27 and the seventh magnet assembly 28 are sequentially arranged inside the first soft magnetic cylinder 21 from left to right. By setting the first soft magnetic cylinder 21, it is possible to effectively prevent the external magnetic field from interfering with the magnetic circuit of the magnetic field generated by the magnetic field unit 200, thereby preventing the external magnetic field from affecting the magnetic field distribution.

[0064] Specifically, if Figure 3 and Figure 4 As shown, the first magnet assembly 22 includes a first axially magnetized permanent magnet ring 221, a first radially magnetized permanent magnet ring 222 and a second axially magnetized permanent magnet ring 223. The first radially magnetized permanent magnet ring 222 is arranged inside the first axially magnetized permanent magnet ring 221, and the second axially magnetized permanent magnet ring 223 is arranged on the right side of the first axially magnetized permanent magnet ring 221. The magnetization directions of the first axially magnetized permanent magnet ring 221 and the second axially magnetized permanent magnet ring 223 are both along the axial direction of the drift tube 600 pointing to the magnetic field unit 100, and the magnetization direction of the first radially magnetized permanent magnet ring 222 is along the radial direction of the drift tube 600 pointing to the outside (i.e., the side away from the drift tube 600).

[0065] The second magnet assembly 23 includes a first solenoid 231 and a third axially magnetized permanent magnet ring 232. The third axially magnetized permanent magnet ring 232 is arranged inside the first solenoid 231. A gap of about 1 mm is reserved between the third axially magnetized permanent magnet ring 232 and the first solenoid 231, which is conducive to the subsequent installation of aluminum alloy between the third axially magnetized permanent magnet ring 232 and the first solenoid 231 for packaging and to guide the heat generated by the first solenoid 231 when working. The magnetization direction of the third axially magnetized permanent magnet ring 232 points to the magnetic field unit 100 along the axial direction of the drift tube 600.

[0066] The third magnet assembly 24 includes a fourth axially magnetized permanent magnet ring 241, a soft magnetic ring 242, a fifth axially magnetized permanent magnet ring 243 and a second radially magnetized permanent magnet ring 244. The soft magnetic ring 242, the fifth axially magnetized permanent magnet ring 243 and the second radially magnetized permanent magnet ring 244 are sequentially arranged from left to right inside the fourth axially magnetized permanent magnet ring 241. The magnetization directions of the fourth axially magnetized permanent magnet ring 241 and the fifth axially magnetized permanent magnet ring 243 are both along the axial direction of the drift tube 600 pointing to the magnetic field unit 100, and the magnetization direction of the second radially magnetized permanent magnet ring 244 is along the radial direction of the drift tube 600 pointing to the inside (i.e., toward one side of the drift tube 600).

[0067] The fourth magnet assembly 25 includes a second solenoid 251 and a sixth axially magnetized permanent magnet ring 252. The sixth axially magnetized permanent magnet ring 252 is arranged inside the second solenoid 251. A gap of about 1 mm is reserved between the sixth axially magnetized permanent magnet ring 252 and the second solenoid 251, which is conducive to the subsequent installation of aluminum alloy between the sixth axially magnetized permanent magnet ring 252 and the second solenoid 251 for packaging and to guide the heat generated by the second solenoid 251 during operation. The magnetization direction of the sixth axially magnetized permanent magnet ring 252 points to the magnetic field unit 100 along the axial direction of the drift tube 600.

[0068] The fifth magnet assembly 26 includes a third radial magnetized permanent magnet ring 261, a fourth radial magnetized permanent magnet ring 262, a seventh axial magnetized permanent magnet ring 263 and a fifth radial magnetized permanent magnet ring 264. The fourth radial magnetized permanent magnet ring 262 and the seventh axial magnetized permanent magnet ring 263 are arranged in sequence from left to right inside the third radial magnetized permanent magnet ring 261, and the fifth radial magnetized permanent magnet ring 264 is arranged inside the seventh axial magnetized permanent magnet ring 263. The magnetization directions of the third radial magnetized permanent magnet ring 261 and the fourth radial magnetized permanent magnet ring 262 are both directed radially outward of the drift tube 600 (i.e., away from the side of the drift tube 600), the magnetization direction of the seventh axial magnetized permanent magnet ring 263 is directed axially toward the magnetic field unit 100 of the drift tube 600, and the magnetization direction of the fifth radial magnetized permanent magnet ring 264 is directed radially inward of the drift tube 600 (i.e., toward the side of the drift tube 600).

[0069] The sixth magnet assembly 27 includes a third solenoid 271 that is separately provided.

[0070] The seventh magnet assembly 28 includes an eighth axially magnetized permanent magnet ring 281, a ninth axially magnetized permanent magnet ring 282 and a sixth radially magnetized permanent magnet ring 283. The ninth axially magnetized permanent magnet ring 282 is arranged on the right side of the eighth axially magnetized permanent magnet ring 281, and the sixth radially magnetized permanent magnet ring 283 is arranged inside the eighth axially magnetized permanent magnet ring 281. The magnetization directions of the eighth axially magnetized permanent magnet ring 281 and the ninth axially magnetized permanent magnet ring 282 are both along the axial direction of the drift tube 600 pointing to the magnetic field unit 100, and the magnetization direction of the sixth radially magnetized permanent magnet ring 283 is along the radial direction of the drift tube 600 pointing to the outside (i.e., the side away from the drift tube 600).

[0071] In actual implementation, a gap of about 1 mm is reserved between the first magnet assembly 22 and the second magnet assembly 23, between the second magnet assembly 23 and the third magnet assembly 24, between the third magnet assembly 24 and the fourth magnet assembly 25, between the fourth magnet assembly 25 and the fifth magnet assembly 26, between the fifth magnet assembly 26 and the sixth magnet assembly 27, between the sixth magnet assembly 27 and the seventh magnet assembly 28, between the first magnet assembly 22 and the first soft magnetic cylinder 21, between the second magnet assembly 23 and the first soft magnetic cylinder 21, between the third magnet assembly 24 and the first soft magnetic cylinder 21, between the fourth magnet assembly 25 and the first soft magnetic cylinder 21, between the fifth magnet assembly 26 and the first soft magnetic cylinder 21, between the sixth magnet assembly 27 and the first soft magnetic cylinder 21, and between the seventh magnet assembly 28 and the first soft magnetic cylinder 21, which is conducive to the subsequent installation of aluminum alloy between each gap for packaging and to guide the heat generated by each solenoid in the magnetic field unit 200 during operation. It should be noted that the power consumptions of the first solenoid 231 , the second solenoid 251 and the third solenoid 271 in the second magnetic field unit 200 are 109W, 98W and 162W respectively.

[0072] Combination Figure 2 As shown, the magnetic field unit three 300 includes a second soft magnetic cylinder 31, an eighth magnet assembly 32, a ninth magnet assembly 33, a tenth magnet assembly 34, an eleventh magnet assembly 35, a twelfth magnet assembly 36, a thirteenth magnet assembly 37 and a fourteenth magnet assembly 38; the eighth magnet assembly 32, the ninth magnet assembly 33, the tenth magnet assembly 34, the eleventh magnet assembly 35, the twelfth magnet assembly 36, the thirteenth magnet assembly 37 and the fourteenth magnet assembly 38 are sequentially arranged inside the second soft magnetic cylinder 31 from left to right. By setting the second soft magnetic cylinder 31, it is possible to effectively prevent the external magnetic field from interfering with the magnetic circuit of the magnetic field generated by the magnetic field unit three 300, thereby preventing the external magnetic field from affecting the magnetic field distribution.

[0073] Specifically, Figure 5 and Figure 6 As shown, the eighth magnet assembly 32 includes a seventh radial magnetization permanent magnet ring 321, a tenth axial magnetization permanent magnet ring 322, an eighth radial magnetization permanent magnet ring 323 and an eleventh axial magnetization permanent magnet ring 324, the tenth axial magnetization permanent magnet ring 322 is arranged inside the seventh radial magnetization permanent magnet ring 321, the eighth radial magnetization permanent magnet ring 323 and the eleventh axial magnetization permanent magnet ring 324 are arranged inside the tenth axial magnetization permanent magnet ring 322 from left to right, the magnetization directions of the seventh radial magnetization permanent magnet ring 321 and the eighth radial magnetization permanent magnet ring 323 are both radially pointing outward (i.e., away from the side of the drift tube 600) of the drift tube 600, and the magnetization directions of the tenth axial magnetization permanent magnet ring 322 and the eleventh axial magnetization permanent magnet ring 324 are both axially pointing to the magnetic field unit 100 of the drift tube 600.

[0074] The ninth magnet assembly 33 includes a separately provided fourth solenoid 331.

[0075] The tenth magnet assembly 34 includes a ninth radially magnetized permanent magnet ring 341, a twelfth axially magnetized permanent magnet ring 342, a tenth radially magnetized permanent magnet ring 343, and a thirteenth axially magnetized permanent magnet ring 344. The twelfth axially magnetized permanent magnet ring 342 is disposed inside the ninth radially magnetized permanent magnet ring 341. The tenth radially magnetized permanent magnet ring 343 and the thirteenth axially magnetized permanent magnet ring 344 are sequentially disposed inside the twelfth axially magnetized permanent magnet ring 342 from left to right. The magnetization directions of the ninth radially magnetized permanent magnet ring 341 and the tenth radially magnetized permanent magnet ring 343 both point outward along the radial direction of the drift tube 600 (i.e., the side away from the drift tube 600), and the magnetization directions of the twelfth axially magnetized permanent magnet ring 342 and the thirteenth axially magnetized permanent magnet ring 344 both point toward the magnetic field unit one 100 along the axial direction of the drift tube 600.

[0076] The eleventh magnet assembly 35 includes a separately provided fifth solenoid 351.

[0077] The twelfth magnet assembly 36 includes an eleventh radially magnetized permanent magnet ring 361, a fourteenth axially magnetized permanent magnet ring 362, a twelfth radially magnetized permanent magnet ring 363, and a fifteenth axially magnetized permanent magnet ring 364. The fourteenth axially magnetized permanent magnet ring 362 is disposed inside the eleventh radially magnetized permanent magnet ring 361. The twelfth radially magnetized permanent magnet ring 363 and the fifteenth axially magnetized permanent magnet ring 364 are sequentially disposed inside the fourteenth axially magnetized permanent magnet ring 362 from left to right. The magnetization directions of the eleventh radially magnetized permanent magnet ring 361 and the twelfth radially magnetized permanent magnet ring 363 both point outward along the radial direction of the drift tube 600 (i.e., the side away from the drift tube 600), and the magnetization directions of the fourteenth axially magnetized permanent magnet ring 362 and the fifteenth axially magnetized permanent magnet ring 364 both point toward the magnetic field unit one 100 along the axial direction of the drift tube 600.

[0078] The thirteenth magnet assembly 37 includes a separately provided sixth solenoid 371.

[0079] The fourteenth magnet assembly 38 includes a thirteenth radially magnetized permanent magnet ring 381 and a sixteenth axially magnetized permanent magnet ring 382. The sixteenth axially magnetized permanent magnet ring 382 is disposed inside the thirteenth radially magnetized permanent magnet ring 381. The magnetization direction of the thirteenth radially magnetized permanent magnet ring 381 points outward along the radial direction of the drift tube 600 (i.e., the side away from the drift tube 600), and the magnetization direction of the sixteenth axially magnetized permanent magnet ring 382 points toward the magnetic field unit one 100 along the axial direction of the drift tube 600.

[0080] In actual implementation, there is a gap of about 1 mm reserved between the eighth magnet assembly 32 and the ninth magnet assembly 33, between the ninth magnet assembly 33 and the tenth magnet assembly 34, between the tenth magnet assembly 34 and the eleventh magnet assembly 35, between the eleventh magnet assembly 35 and the twelfth magnet assembly 36, between the twelfth magnet assembly 36 and the thirteenth magnet assembly 37, between the thirteenth magnet assembly 37 and the fourteenth magnet assembly 38, between the eighth magnet assembly 32 and the second soft magnetic cylinder 31, between the ninth magnet assembly 33 and the second soft magnetic cylinder 31, between the tenth magnet assembly 34 and the second soft magnetic cylinder 31, between the eleventh magnet assembly 35 and the second soft magnetic cylinder 31, between the twelfth magnet assembly 36 and the second soft magnetic cylinder 31, between the thirteenth magnet assembly 37 and the second soft magnetic cylinder 31, and between the fourteenth magnet assembly 38 and the second soft magnetic cylinder 31. This is beneficial for subsequent installation of aluminum alloy between each gap for encapsulation and for dissipating the heat generated when each solenoid in the magnetic field unit three 300 operates. It should be noted that the power consumptions of the fourth solenoid 331, the fifth solenoid 351, and the sixth solenoid 371 in the magnetic field unit three 300 are all 112.3 W.

[0081] Combined with Figure 2 the content shown, the magnetic field unit four 400 includes a third soft magnetic cylinder 41, a fifteenth magnet assembly 42, a sixteenth magnet assembly 43, a seventeenth magnet assembly 44, an eighteenth magnet assembly 45, and a nineteenth magnet assembly 46; the fifteenth magnet assembly 42, the sixteenth magnet assembly 43, the seventeenth magnet assembly 44, the eighteenth magnet assembly 45, and the nineteenth magnet assembly 46 are sequentially arranged inside the third soft magnetic cylinder 41 from left to right. By providing the third soft magnetic cylinder 41, it can effectively prevent the external magnetic field from interfering with the magnetic circuit of the magnetic field generated by the magnetic field unit four 400 and avoid the external magnetic field from affecting the magnetic field distribution.

[0082] Specifically, as Figure 7 and Figure 8As shown, the fifteenth magnet assembly 42 includes a fourteenth radially magnetized permanent magnet ring 421, a fifteenth radially magnetized permanent magnet ring 422, a sixteenth radially magnetized permanent magnet ring 423, a seventeenth axially magnetized permanent magnet ring 424, a seventeenth radially magnetized permanent magnet ring 425, and an eighteenth axially magnetized permanent magnet ring 426. The fourteenth radially magnetized permanent magnet ring 421, the fifteenth radially magnetized permanent magnet ring 422, and the sixteenth radially magnetized permanent magnet ring 423 are arranged in sequence from left to right. The seventeenth axially magnetized permanent magnet ring 424 is disposed inside the fifteenth radially magnetized permanent magnet ring 422. The seventeenth radially magnetized permanent magnet ring 425 is disposed inside the seventeenth axially magnetized permanent magnet ring 424. The eighteenth axially magnetized permanent magnet ring 426 is disposed inside the sixteenth radially magnetized permanent magnet ring 423. The magnetization directions of the fourteenth radially magnetized permanent magnet ring 421, the fifteenth radially magnetized permanent magnet ring 422, and the sixteenth radially magnetized permanent magnet ring 423 all point outward along the radial direction of the drift tube 600 (i.e., the side away from the drift tube 600). The magnetization directions of the seventeenth axially magnetized permanent magnet ring 424 and the eighteenth axially magnetized permanent magnet ring 426 both point toward the magnetic field unit 100 along the axial direction of the drift tube 600. The magnetization direction of the seventeenth radially magnetized permanent magnet ring 425 points inward along the radial direction of the drift tube 600 (i.e., the side toward the drift tube 600).

[0083] The sixteenth magnet assembly 43 includes a separately provided seventh solenoid 431.

[0084] The seventeenth magnet assembly 44 includes an eighteenth radially magnetized permanent magnet ring 441, a nineteenth radially magnetized permanent magnet ring 442, a twentieth radially magnetized permanent magnet ring 443, a nineteenth axially magnetized permanent magnet ring 444, a twentieth axially magnetized permanent magnet ring 445, and a twenty-first axially magnetized permanent magnet ring 446. The eighteenth radially magnetized permanent magnet ring 441, the nineteenth radially magnetized permanent magnet ring 442, and the twentieth radially magnetized permanent magnet ring 443 are arranged in sequence from left to right. The nineteenth axially magnetized permanent magnet ring 444 is disposed inside the eighteenth radially magnetized permanent magnet ring 441. The twentieth axially magnetized permanent magnet ring 445 is disposed inside the nineteenth radially magnetized permanent magnet ring 442. The twenty-first axially magnetized permanent magnet ring 446 is disposed inside the twentieth radially magnetized permanent magnet ring 443. The magnetization directions of the eighteenth radially magnetized permanent magnet ring 441, the nineteenth radially magnetized permanent magnet ring 442, and the twentieth radially magnetized permanent magnet ring 443 all point outward along the radial direction of the drift tube 600 (i.e., the side away from the drift tube 600). The magnetization directions of the nineteenth axially magnetized permanent magnet ring 444, the twentieth axially magnetized permanent magnet ring 445, and the twenty-first axially magnetized permanent magnet ring 446 all point toward the magnetic field unit 100 along the axial direction of the drift tube 600.

[0085] The eighteenth magnet assembly 45 includes a separately provided eighth solenoid 451;

[0086] The nineteenth magnet assembly 46 includes a twenty-first radial magnetized permanent magnet ring 461, a twenty-second radial magnetized permanent magnet ring 462, a twenty-third radial magnetized permanent magnet ring 463, a twenty-second axial magnetized permanent magnet ring 464, a twenty-third axial magnetized permanent magnet ring 465 and a twenty-fourth axial magnetized permanent magnet ring 466. The twenty-first radial magnetized permanent magnet ring 461, the twenty-second radial magnetized permanent magnet ring 462 and the twenty-third radial magnetized permanent magnet ring 463 are arranged in sequence from left to right. The twenty-second axial magnetized permanent magnet ring 464 is arranged inside the twenty-first radial magnetized permanent magnet ring 461, and the twenty-third axial magnetized permanent magnet ring 465 is arranged inside the twenty-third radial magnetized permanent magnet ring 466. The twenty-second radial magnetization permanent magnet ring 462 is placed inside the twenty-fourth axial magnetization permanent magnet ring 466 is arranged inside the twenty-third radial magnetization permanent magnet ring 463, the magnetization directions of the twenty-first radial magnetization permanent magnet ring 461, the twenty-second radial magnetization permanent magnet ring 462 and the twenty-third radial magnetization permanent magnet ring 463 are all radially pointing outward (i.e., away from the side of the drift tube 600) of the drift tube 600, and the magnetization directions of the twenty-second axial magnetization permanent magnet ring 464, the twenty-third axial magnetization permanent magnet ring 465 and the twenty-fourth axial magnetization permanent magnet ring 466 are all axially pointing to the magnetic field unit 100 of the drift tube 600.

[0087] In actual implementation, a gap of about 1 mm is reserved between the fifteenth magnet assembly 42 and the sixteenth magnet assembly 43, between the sixteenth magnet assembly 43 and the seventeenth magnet assembly 44, between the seventeenth magnet assembly 44 and the eighteenth magnet assembly 45, between the eighteenth magnet assembly 45 and the nineteenth magnet assembly 46, between the fifteenth magnet assembly 42 and the third soft magnetic cylinder 41, between the sixteenth magnet assembly 43 and the third soft magnetic cylinder 41, between the seventeenth magnet assembly 44 and the third soft magnetic cylinder 41, between the eighteenth magnet assembly 45 and the third soft magnetic cylinder 41, and between the nineteenth magnet assembly 46 and the third soft magnetic cylinder 41, which is conducive to the subsequent installation of aluminum alloy between each gap for packaging and the heat generated when each solenoid in the magnetic field unit four 400 is working. It should be noted that the power consumption of the seventh solenoid 431 and the eighth solenoid 451 in the magnetic field unit four 400 is 64.5W.

[0088] Combination Figure 2 As shown in the content, the magnetic field unit five 500 includes a fourth soft magnetic tube 51, a twentieth magnet assembly 52 and a twenty-first magnet assembly 53. The twentieth magnet assembly 52 and the twenty-first magnet assembly 53 are sequentially arranged inside the fourth soft magnetic tube 51 from left to right. By setting the fourth soft magnetic tube 51, it is possible to effectively prevent the external magnetic field from interfering with the magnetic circuit of the magnetic field generated by the magnetic field unit five 500, thereby preventing the external magnetic field from affecting the magnetic field distribution.

[0089] Specifically, Figure 9 and Figure 10As shown in the figure, the twentieth magnet assembly 52 includes a twenty-fourth radially magnetized permanent magnet ring 521, a twenty-fifth axially magnetized permanent magnet ring 522, a twenty-sixth axially magnetized permanent magnet ring 523, and a twenty-seventh axially magnetized permanent magnet ring 524. The twenty-fifth axially magnetized permanent magnet ring 522, the twenty-sixth axially magnetized permanent magnet ring 523, and the twenty-seventh axially magnetized permanent magnet ring 524 are sequentially arranged inside the twenty-fourth radially magnetized permanent magnet ring 521 from left to right. The magnetization direction of the twenty-fourth radially magnetized permanent magnet ring 521 points outward along the radial direction of the drift tube 600 (i.e., the side away from the drift tube 600). The magnetization directions of the twenty-fifth axially magnetized permanent magnet ring 522 and the twenty-seventh axially magnetized permanent magnet ring 524 both point to the side away from the first magnetic field unit 100 along the axial direction of the drift tube 600 (i.e., the right side of the drift tube 600, which is also the moving direction of the electron beam). The magnetization direction of the twenty-sixth axially magnetized permanent magnet ring 523 points to the first magnetic field unit 100 along the axial direction of the drift tube 600.

[0090] The twenty-first magnet assembly 53 includes a twenty-fifth radially magnetized permanent magnet ring 531 and a twenty-eighth axially magnetized permanent magnet ring 532. The twenty-eighth axially magnetized permanent magnet ring 532 is arranged inside the twenty-fifth radially magnetized permanent magnet ring 531. The magnetization direction of the twenty-fifth radially magnetized permanent magnet ring 531 points outward along the radial direction of the drift tube 600 (i.e., the side away from the drift tube 600). The magnetization direction of the twenty-eighth axially magnetized permanent magnet ring 532 points to the side away from the first magnetic field unit 100 along the axial direction of the drift tube 600 (i.e., the right side of the drift tube 600, which is also the moving direction of the electron beam).

[0091] During actual implementation, a gap of about 1 mm is reserved between the twentieth magnet assembly 52 and the twenty-first magnet assembly 53, between the twentieth magnet assembly 52 and the fourth soft magnetic cylinder 51, and between the twenty-first magnet assembly 53 and the fourth soft magnetic cylinder 51, which is beneficial for subsequent installation of aluminum alloy for encapsulation between each gap.

[0092] By testing the above-described quasi-uniform guiding magnetic field system provided in this embodiment, a distribution diagram of the axial magnetic field intensity at the center of the guiding magnetic field 6 mm as shown in Figure 11 the figure is obtained. Combining Figure 11It can be seen that the guiding magnetic field system composed of the magnetic field unit one 100, the magnetic field unit two 200, the magnetic field unit three 300, the magnetic field unit four 400 and the magnetic field unit five 500 can form a quasi-uniform guiding magnetic field with a magnetic field intensity of about 0.27T, enabling the electron beam formed by an electron beam with a voltage of 450KV and a current of 700A to have a passing rate of 100% in the formed guiding magnetic field, ensuring the stable transmission of the electron beam and the stable operation of related supporting devices. The structure of the entire guiding magnetic field system is compact, with a small volume and weight, and low power consumption (specifically, the total weight of all permanent magnets used in this guiding magnetic field system is about 4.2kg, the weight of all solenoids is about 2.2kg, and the total power consumption of all solenoids is about 835W), thus providing reliable support for the compact and miniaturized design of the guiding magnetic field system.

[0093] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A gap-containing quasi-uniform guiding magnetic field system for forming a guiding magnetic field within a drift tube for electron beam movement, characterized in that, It includes a magnetic field unit one, a magnetic field unit two, a magnetic field unit three, a magnetic field unit four, and a magnetic field unit five; The magnetic field unit one is arranged on the left side of the drift tube; the magnetic field unit two, the magnetic field unit three, the magnetic field unit four, and the magnetic field unit five are sequentially sleeved on the outer wall of the drift tube at intervals from left to right; Among them, the magnetic fields generated by the magnetic field unit one, the magnetic field unit two, the magnetic field unit three, the magnetic field unit four, and the magnetic field unit five are superimposed on each other to form a guiding magnetic field for guiding the movement of the electron beam; The magnetic field unit one includes an axially magnetized permanent magnet one, and the axially magnetized permanent magnet one is arranged on the left side of the drift tube; The magnetic field unit two includes a first soft magnetic cylinder, a first magnet assembly, a second magnet assembly, a third magnet assembly, a fourth magnet assembly, a fifth magnet assembly, a sixth magnet assembly, and a seventh magnet assembly; the first magnet assembly, the second magnet assembly, the third magnet assembly, the fourth magnet assembly, the fifth magnet assembly, the sixth magnet assembly, and the seventh magnet assembly are sequentially arranged inside the first soft magnetic cylinder from left to right; The magnetic field unit three includes a second soft magnetic cylinder, an eighth magnet assembly, a ninth magnet assembly, a tenth magnet assembly, an eleventh magnet assembly, a twelfth magnet assembly, a thirteenth magnet assembly, and a fourteenth magnet assembly; the eighth magnet assembly, the ninth magnet assembly, the tenth magnet assembly, the eleventh magnet assembly, the twelfth magnet assembly, the thirteenth magnet assembly, and the fourteenth magnet assembly are sequentially arranged inside the second soft magnetic cylinder from left to right; The magnetic field unit four includes a third soft magnetic cylinder, a fifteenth magnet assembly, a sixteenth magnet assembly, a seventeenth magnet assembly, an eighteenth magnet assembly, and a nineteenth magnet assembly; the fifteenth magnet assembly, the sixteenth magnet assembly, the seventeenth magnet assembly, the eighteenth magnet assembly, and the nineteenth magnet assembly are sequentially arranged inside the third soft magnetic cylinder from left to right; The magnetic field unit five includes a fourth soft magnetic cylinder, a twentieth magnet assembly, and a twenty-first magnet assembly, and the twentieth magnet assembly and the twenty-first magnet assembly are sequentially arranged inside the fourth soft magnetic cylinder from left to right.

2. The gap-containing quasi-uniform guiding magnetic field system according to claim 1, characterized in that, The axis of the axially magnetized permanent magnet one coincides with the axis of the drift tube, and the magnetization direction of the axially magnetized permanent magnet one points along the axial direction of the drift tube to the magnetic field unit five.

3. The gap-containing quasi-uniform guiding magnetic field system according to claim 1, characterized in that, The first magnet assembly includes a first axially magnetized permanent magnet ring, a first radially magnetized permanent magnet ring, and a second axially magnetized permanent magnet ring. The first radially magnetized permanent magnet ring is arranged inside the first axially magnetized permanent magnet ring, and the second axially magnetized permanent magnet ring is arranged on the right side of the first axially magnetized permanent magnet ring. The magnetization directions of the first axially magnetized permanent magnet ring and the second axially magnetized permanent magnet ring both point along the axial direction of the drift tube to the magnetic field unit one, and the magnetization direction of the first radially magnetized permanent magnet ring points radially outward along the drift tube; The second magnet assembly includes a first solenoid and a third axially magnetized permanent magnet ring. The third axially magnetized permanent magnet ring is arranged inside the first solenoid, and there is a gap reserved between the third axially magnetized permanent magnet ring and the first solenoid. The magnetization direction of the third axially magnetized permanent magnet ring points along the axial direction of the drift tube to the magnetic field unit one; The third magnet assembly includes a fourth axially magnetized permanent magnet ring, a soft magnetic ring, a fifth axially magnetized permanent magnet ring, and a second radially magnetized permanent magnet ring. The soft magnetic ring, the fifth axially magnetized permanent magnet ring, and the second radially magnetized permanent magnet ring are sequentially arranged inside the fourth axially magnetized permanent magnet ring from left to right. The magnetization directions of the fourth axially magnetized permanent magnet ring and the fifth axially magnetized permanent magnet ring both point to magnetic field unit one along the axis of the drift tube. The magnetization direction of the second radially magnetized permanent magnet ring points to the inside along the radius of the drift tube. The fourth magnet assembly includes a second solenoid and a sixth axially magnetized permanent magnet ring. The sixth axially magnetized permanent magnet ring is arranged inside the second solenoid, and there is a gap reserved between the sixth axially magnetized permanent magnet ring and the second solenoid. The magnetization direction of the sixth axially magnetized permanent magnet ring points to magnetic field unit one along the axis of the drift tube. The fifth magnet assembly includes a third radially magnetized permanent magnet ring, a fourth radially magnetized permanent magnet ring, a seventh axially magnetized permanent magnet ring, and a fifth radially magnetized permanent magnet ring. The fourth radially magnetized permanent magnet ring and the seventh axially magnetized permanent magnet ring are sequentially arranged inside the third radially magnetized permanent magnet ring from left to right. The fifth radially magnetized permanent magnet ring is arranged inside the seventh axially magnetized permanent magnet ring. The magnetization directions of the third radially magnetized permanent magnet ring and the fourth radially magnetized permanent magnet ring both point to the outside along the radius of the drift tube. The magnetization direction of the seventh axially magnetized permanent magnet ring points to magnetic field unit one along the axis of the drift tube. The magnetization direction of the fifth radially magnetized permanent magnet ring points to the inside along the radius of the drift tube. The sixth magnet assembly includes a third solenoid. The seventh magnet assembly includes an eighth axially magnetized permanent magnet ring, a ninth axially magnetized permanent magnet ring, and a sixth radially magnetized permanent magnet ring. The ninth axially magnetized permanent magnet ring is arranged on the right side of the eighth axially magnetized permanent magnet ring. The sixth radially magnetized permanent magnet ring is arranged inside the eighth axially magnetized permanent magnet ring. The magnetization directions of the eighth axially magnetized permanent magnet ring and the ninth axially magnetized permanent magnet ring both point to magnetic field unit one along the axis of the drift tube. The magnetization direction of the sixth radially magnetized permanent magnet ring points to the outside along the radius of the drift tube.

4. The gap-containing quasi-uniform guiding magnetic field system according to claim 3, characterized in that, Gaps are reserved between the first magnet assembly and the second magnet assembly, between the second magnet assembly and the third magnet assembly, between the third magnet assembly and the fourth magnet assembly, between the fourth magnet assembly and the fifth magnet assembly, between the fifth magnet assembly and the sixth magnet assembly, between the sixth magnet assembly and the seventh magnet assembly, between the first magnet assembly and the first soft magnetic cylinder, between the second magnet assembly and the first soft magnetic cylinder, between the third magnet assembly and the first soft magnetic cylinder, between the fourth magnet assembly and the first soft magnetic cylinder, between the fifth magnet assembly and the first soft magnetic cylinder, between the sixth magnet assembly and the first soft magnetic cylinder, and between the seventh magnet assembly and the first soft magnetic cylinder.

5. The gap-containing quasi-uniform guiding magnetic field system according to claim 1, characterized in that, The eighth magnet assembly includes a seventh radially magnetized permanent magnet ring, a tenth axially magnetized permanent magnet ring, an eighth radially magnetized permanent magnet ring, and an eleventh axially magnetized permanent magnet ring. The tenth axially magnetized permanent magnet ring is disposed inside the seventh radially magnetized permanent magnet ring. The eighth radially magnetized permanent magnet ring and the eleventh axially magnetized permanent magnet ring are sequentially disposed inside the tenth axially magnetized permanent magnet ring from left to right. The magnetization directions of the seventh radially magnetized permanent magnet ring and the eighth radially magnetized permanent magnet ring both point outward along the radial direction of the drift tube. The magnetization directions of the tenth axially magnetized permanent magnet ring and the eleventh axially magnetized permanent magnet ring both point toward magnetic field unit one along the axial direction of the drift tube; The ninth magnet assembly includes a fourth solenoid; The tenth magnet assembly includes a ninth radially magnetized permanent magnet ring, a twelfth axially magnetized permanent magnet ring, a tenth radially magnetized permanent magnet ring, and a thirteenth axially magnetized permanent magnet ring. The twelfth axially magnetized permanent magnet ring is disposed inside the ninth radially magnetized permanent magnet ring. The tenth radially magnetized permanent magnet ring and the thirteenth axially magnetized permanent magnet ring are sequentially disposed inside the twelfth axially magnetized permanent magnet ring from left to right. The magnetization directions of the ninth radially magnetized permanent magnet ring and the tenth radially magnetized permanent magnet ring both point outward along the radial direction of the drift tube. The magnetization directions of the twelfth axially magnetized permanent magnet ring and the thirteenth axially magnetized permanent magnet ring both point toward magnetic field unit one along the axial direction of the drift tube; The eleventh magnet assembly includes a fifth solenoid; The twelfth magnet assembly includes an eleventh radially magnetized permanent magnet ring, a fourteenth axially magnetized permanent magnet ring, a twelfth radially magnetized permanent magnet ring, and a fifteenth axially magnetized permanent magnet ring. The fourteenth axially magnetized permanent magnet ring is disposed inside the eleventh radially magnetized permanent magnet ring. The twelfth radially magnetized permanent magnet ring and the fifteenth axially magnetized permanent magnet ring are sequentially disposed inside the fourteenth axially magnetized permanent magnet ring from left to right. The magnetization directions of the eleventh radially magnetized permanent magnet ring and the twelfth radially magnetized permanent magnet ring both point outward along the radial direction of the drift tube. The magnetization directions of the fourteenth axially magnetized permanent magnet ring and the fifteenth axially magnetized permanent magnet ring both point toward magnetic field unit one along the axial direction of the drift tube; The thirteenth magnet assembly includes a sixth solenoid; The fourteenth magnet assembly includes a thirteenth radially magnetized permanent magnet ring and a sixteenth axially magnetized permanent magnet ring. The sixteenth axially magnetized permanent magnet ring is disposed inside the thirteenth radially magnetized permanent magnet ring. The magnetization direction of the thirteenth radially magnetized permanent magnet ring points outward along the radial direction of the drift tube. The magnetization direction of the sixteenth axially magnetized permanent magnet ring points toward magnetic field unit one along the axial direction of the drift tube.

6. The gap-containing quasi-uniform guiding magnetic field system according to claim 5, characterized in that, A gap is reserved between the eighth magnet assembly and the ninth magnet assembly, between the ninth magnet assembly and the tenth magnet assembly, between the tenth magnet assembly and the eleventh magnet assembly, between the eleventh magnet assembly and the twelfth magnet assembly, between the twelfth magnet assembly and the thirteenth magnet assembly, between the thirteenth magnet assembly and the fourteenth magnet assembly, between the eighth magnet assembly and the second soft magnetic cylinder, between the ninth magnet assembly and the second soft magnetic cylinder, between the tenth magnet assembly and the second soft magnetic cylinder, between the eleventh magnet assembly and the second soft magnetic cylinder, between the twelfth magnet assembly and the second soft magnetic cylinder, between the thirteenth magnet assembly and the second soft magnetic cylinder, and between the fourteenth magnet assembly and the second soft magnetic cylinder.

7. The gap-containing quasi-uniform guiding magnetic field system according to claim 1, characterized in that, The fifteenth magnet assembly includes a fourteenth radially magnetized permanent magnet ring, a fifteenth radially magnetized permanent magnet ring, a sixteenth radially magnetized permanent magnet ring, a seventeenth axially magnetized permanent magnet ring, a seventeenth radially magnetized permanent magnet ring, and an eighteenth axially magnetized permanent magnet ring. The fourteenth radially magnetized permanent magnet ring, the fifteenth radially magnetized permanent magnet ring, and the sixteenth radially magnetized permanent magnet ring are arranged in sequence from left to right. The seventeenth axially magnetized permanent magnet ring is arranged inside the fifteenth radially magnetized permanent magnet ring. The seventeenth radially magnetized permanent magnet ring is arranged inside the seventeenth axially magnetized permanent magnet ring. The eighteenth axially magnetized permanent magnet ring is arranged inside the sixteenth radially magnetized permanent magnet ring. The magnetization directions of the fourteenth radially magnetized permanent magnet ring, the fifteenth radially magnetized permanent magnet ring, and the sixteenth radially magnetized permanent magnet ring all point outward along the radial direction of the drift tube. The magnetization directions of the seventeenth axially magnetized permanent magnet ring and the eighteenth axially magnetized permanent magnet ring both point toward the magnetic field unit one along the axial direction of the drift tube. The magnetization direction of the seventeenth radially magnetized permanent magnet ring points inward along the radial direction of the drift tube. The sixteenth magnet assembly includes a seventh solenoid. The seventeenth magnet assembly includes an eighteenth radially magnetized permanent magnet ring, a nineteenth radially magnetized permanent magnet ring, a twentieth radially magnetized permanent magnet ring, a nineteenth axially magnetized permanent magnet ring, a twentieth axially magnetized permanent magnet ring, and a twenty-first axially magnetized permanent magnet ring. The eighteenth radially magnetized permanent magnet ring, the nineteenth radially magnetized permanent magnet ring, and the twentieth radially magnetized permanent magnet ring are arranged in sequence from left to right. The nineteenth axially magnetized permanent magnet ring is arranged inside the eighteenth radially magnetized permanent magnet ring. The twentieth axially magnetized permanent magnet ring is arranged inside the nineteenth radially magnetized permanent magnet ring. The twenty-first axially magnetized permanent magnet ring is arranged inside the twentieth radially magnetized permanent magnet ring. The magnetization directions of the eighteenth radially magnetized permanent magnet ring, the nineteenth radially magnetized permanent magnet ring, and the twentieth radially magnetized permanent magnet ring all point outward along the radial direction of the drift tube. The magnetization directions of the nineteenth axially magnetized permanent magnet ring, the twentieth axially magnetized permanent magnet ring, and the twenty-first axially magnetized permanent magnet ring all point toward the magnetic field unit one along the axial direction of the drift tube. The eighteenth magnet assembly includes an eighth solenoid. The nineteenth magnet assembly includes a twenty-first radial magnetization permanent magnet ring, a twenty-second radial magnetization permanent magnet ring, a twenty-third radial magnetization permanent magnet ring, a twenty-second axial magnetization permanent magnet ring, a twenty-third axial magnetization permanent magnet ring and a twenty-fourth axial magnetization permanent magnet ring. The twenty-first radial magnetization permanent magnet ring, the twenty-second radial magnetization permanent magnet ring and the twenty-third radial magnetization permanent magnet ring are arranged in sequence from left to right. The twenty-second axial magnetization permanent magnet ring is arranged inside the twenty-first radial magnetization permanent magnet ring, the twenty-third axial magnetization permanent magnet ring is arranged inside the twenty-second radial magnetization permanent magnet ring, and the twenty-fourth axial magnetization permanent magnet ring is arranged inside the twenty-third radial magnetization permanent magnet ring. The magnetization directions of the twenty-first radial magnetization permanent magnet ring, the twenty-second radial magnetization permanent magnet ring and the twenty-third radial magnetization permanent magnet ring are all directed outward along the radial direction of the drift tube, and the magnetization directions of the twenty-second axial magnetization permanent magnet ring, the twenty-third axial magnetization permanent magnet ring and the twenty-fourth axial magnetization permanent magnet ring are all directed toward the magnetic field unit one along the axial direction of the drift tube.

8. The gap-containing quasi-uniform guiding magnetic field system according to claim 7, wherein, Gaps are reserved between the fifteenth magnet assembly and the sixteenth magnet assembly, between the sixteenth magnet assembly and the seventeenth magnet assembly, between the seventeenth magnet assembly and the eighteenth magnet assembly, between the eighteenth magnet assembly and the nineteenth magnet assembly, between the fifteenth magnet assembly and the third soft magnetic cylinder, between the sixteenth magnet assembly and the third soft magnetic cylinder, between the seventeenth magnet assembly and the third soft magnetic cylinder, between the eighteenth magnet assembly and the third soft magnetic cylinder, and between the nineteenth magnet assembly and the third soft magnetic cylinder.

9. The gap-containing quasi-uniform guiding magnetic field system according to claim 1, wherein, The 20th magnet assembly includes a 24th radial magnetization permanent magnet ring, a 25th axial magnetization permanent magnet ring, a 26th axial magnetization permanent magnet ring and a 27th axial magnetization permanent magnet ring, the 25th axial magnetization permanent magnet ring, the 26th axial magnetization permanent magnet ring and the 27th axial magnetization permanent magnet ring are sequentially arranged inside the 24th radial magnetization permanent magnet ring from left to right, the magnetization direction of the 24th radial magnetization permanent magnet ring points to the outside along the radial direction of the drift tube, the magnetization directions of the 25th axial magnetization permanent magnet ring and the 27th axial magnetization permanent magnet ring are both along the axial direction of the drift tube pointing away from the magnetic field unit one, and the magnetization direction of the 26th axial magnetization permanent magnet ring points to the magnetic field unit one along the axial direction of the drift tube; The twenty-first magnet assembly includes a twenty-fifth radially magnetized permanent magnet ring and a twenty-eighth axially magnetized permanent magnet ring. The twenty-eighth axially magnetized permanent magnet ring is arranged inside the twenty-fifth radially magnetized permanent magnet ring. The magnetization direction of the twenty-fifth radially magnetized permanent magnet ring points to the outside along the radial direction of the drift tube, and the magnetization direction of the twenty-eighth axially magnetized permanent magnet ring points to the side away from the magnetic field unit one along the axial direction of the drift tube.

10. The gap-containing quasi-uniform guiding magnetic field system according to claim 9, wherein, Gaps are reserved between the 20th magnet assembly and the 21st magnet assembly, between the 20th magnet assembly and the fourth soft magnetic cylinder, and between the 21st magnet assembly and the fourth soft magnetic cylinder.

Images