A cyclotron magnetic field measuring device

Abstract

The application relates to the technical field of magnetic field measuring devices, and discloses a cyclotron magnetic field measuring device which comprises a lower Dewar, a lower magnet, an upper Dewar, an upper magnet, a rotating and detecting part and a rotating supporting part which penetrate through the central holes of the above-mentioned parts. The rotating and detecting part comprises a rotating and detecting member which is composed of a lead screw driven by a bevel gear set and a sliding table which is threadedly connected with the lead screw; the detecting member comprises two detecting rods with different lengths which are symmetrically arranged on the sliding table and are respectively connected with a first Hall probe and a second Hall probe. The rotating supporting part comprises a rotating and supporting member which is connected with a lower motor and is arranged below the bevel gear set; and a rotating and driving member which is connected with an upper motor and is arranged above the bevel gear set and the rotating and detecting member, so that the rotating and driving member can realize rotating adjustment and avoid contacting with the magnets. The device further comprises a measuring frame, a linear guide rail, a measuring and protecting part and a secondary measuring part. The device can realize axial translation of the probes through the rotating and detecting member, can realize radial rotation through the rotating supporting part, and can comprehensively and accurately measure the magnetic field intensity of different regions between the upper magnet and the lower magnet in combination with the detecting rods with different lengths.

Description

Technical Field

[0001] This invention relates to the field of superconducting cyclotron magnet magnetic field measurement technology, specifically to a cyclotron magnetic field measurement device. Background Technology

[0002] A cyclotron is a device that uses the combined effects of magnetic and electric fields to cause charged particles to cyclotron, accelerating them multiple times during this process with the help of a high-frequency electric field. The magnetic field region between the upper and lower main magnet poles has an extremely small gap, forming a relatively enclosed space, with only the central and side holes connected to the pole air gap. This superconducting cyclotron employs an isochronous magnetic field design, resulting in a very high magnetic field strength. The fabricated accelerator requires precise measurement of the magnetic field across the entire pole face, placing high demands on the accuracy and positioning precision of the magnetic field measurement device.

[0003] Existing cyclotron magnetic field measurement devices typically require placing a Hall probe in the region of the magnetic field to be measured. However, the magnetic field distribution is often non-uniform, especially in different regions between the upper and lower magnets, where the magnetic field strength may vary significantly.

[0004] Meanwhile, in order to adapt to different measurement needs or calibration requirements, the measurement position of the Hall probe needs to be flexibly and accurately adjusted. Existing measurement devices have low measurement efficiency and insufficient accuracy, making it difficult to comprehensively measure magnetic field characteristics. Summary of the Invention

[0005] This invention provides a magnetic field measuring device for cyclotrons to solve the problems of insufficient flexibility, low efficiency, and inaccuracy in comprehensively measuring magnetic fields.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0007] In a first aspect, a cyclotron magnetic field measuring device includes a lower Dewar, a lower magnet disposed within the lower Dewar, an upper Dewar, and an upper magnet disposed within the upper Dewar. A central hole is formed through the center of the upper magnet, lower magnet, lower Dewar, and upper Dewar. An upper motor is connected to the upper Dewar via a connecting component, and a lower motor is connected to the lower Dewar via a connecting component. The device further includes:

[0008] The adjustment unit, located between the upper magnet and the lower magnet, and penetrating through the lower magnet and the lower Dewar, includes a drive adjustment component consisting of a bevel gear set and a lead screw driven by the bevel gear set located between the upper magnet and the lower magnet, and a slide table threadedly connected to the lead screw. It also includes a detection component consisting of two probes of different lengths symmetrically arranged on the slide table, and a first Hall probe and a second Hall probe. The lengths of the probes are 20 cm and 42 cm, respectively. The end of one probe is connected to the second Hall probe, and the end of the other probe is connected to the first Hall probe, so as to comprehensively measure the magnetic field strength.

[0009] The support and rotating part is provided through the central hole and connected to the adjustment part. It includes a support and driving member located below the bevel gear set and connected to the lower motor, and a drive member located above the bevel gear set and the drive member. The support and driving member are rotatably connected to the drive member to avoid contact with the upper magnet and to rotate and adjust the detection position of the Hall probe.

[0010] Furthermore, a connecting plate is provided through the central hole of the lower Dewar, and the connecting plate is fixed to the outer wall of the lower Dewar by a fixing component. A support plate is connected to the lower part of the connecting plate by a fixing component.

[0011] The lower motor is fixed to the bottom of the support plate by a connecting component;

[0012] The support plate has a rotating shaft that rotates through it via a bearing, and the rotating shaft moves through the central hole of the connecting plate and the lower Dewar.

[0013] Furthermore, the support member includes:

[0014] The lower sleeve is connected to the upper end of the connecting plate, passes through the center hole of the lower Dewar and the lower magnet, and is located on the outside of the rotating shaft;

[0015] The support plate is fixed to the upper end of the lower sleeve and is located between the lower magnet and the upper magnet;

[0016] The solid plate is set at the center of the support plate;

[0017] The rotating shaft passes through the solid disc via a bearing;

[0018] The swivel support component is rotatably mounted above the support plate.

[0019] Furthermore, the spindle support component includes:

[0020] A flat needle roller bearing is embedded in the support plate;

[0021] The lower turntable rotates to the outer side of the flat needle roller bearing, which is located outside the fixed plate.

[0022] The connecting blocks are symmetrically fixed on the lower turntable.

[0023] Furthermore, the bevel gear set includes:

[0024] The main bevel gear is fixed to the upper end of the rotating shaft and moves through the solid plate.

[0025] The driven bevel gear is fixed at one end of the lead screw and meshes with the main bevel gear, forming a 90-degree engagement with the main bevel gear;

[0026] The protective cover is fixed on the lower turntable and located outside the main bevel gear and the driven bevel gear.

[0027] Furthermore, the detector includes:

[0028] The measuring frame is fixed on the lower turntable;

[0029] The opening is made through the measuring frame and is located on the outside of the protective cover;

[0030] Linear guide rails are fixed on the measuring frame and connected to the slide table guide rails;

[0031] The measuring components are mounted on the measuring frame and connected to the slide table;

[0032] The auxiliary measuring component is mounted on the slide.

[0033] Furthermore, the protective components include:

[0034] The support is fixed to the measuring frame and is pierced by the thread of the lead screw;

[0035] The impact blocks are symmetrically fixed on both sides of the slide table;

[0036] A first micro switch and a second micro switch are fixed on the measuring frame. The first micro switch is closer to the end of the lead screw away from the protective cover, and the second micro switch is closer to the protective cover.

[0037] Furthermore, the sub-testing component includes:

[0038] A bracket is fixed to the slide and located between the two probes;

[0039] The reading head is fixed at one end of the bracket;

[0040] The grating ruler is connected to the lower end of the reading head.

[0041] Furthermore, the drive adjustment component includes:

[0042] The T-disc is set through the central hole of the upper Dewar and connected to the outer wall of the upper Dewar;

[0043] The upper sleeve passes through the center hole of the upper magnet and is connected to the lower end of the T-disk;

[0044] The mounting bracket is fixed to the outer wall of the upper Dewar.

[0045] The upper motor is fixed on the mounting bracket.

[0046] Furthermore, the driver includes:

[0047] The drive shaft is connected to the drive end of the upper motor, and rotates through the T-disc via bearings, and also moves through the upper sleeve;

[0048] The limiting plate is fixed at the lower end of the drive shaft;

[0049] The upper turntable is fixed to the lower end of the limit plate by a connecting component and is fixedly connected to the connecting block.

[0050] The above-described solution of the present invention has at least the following beneficial effects:

[0051] By setting up an adjustment section, using a bevel gear set and a lead screw to drive the slide table to move, and cooperating with the use of probes of different lengths, the first Hall probe and the second Hall probe can be easily moved to different positions between the upper and lower magnets for measurement. In particular, the probes of different lengths enable the device to measure the magnetic field strength of the central and non-central regions simultaneously or separately, achieving comprehensive measurement of the magnetic field distribution. At the same time, by setting up a support rotation section, using a lower motor and an upper motor to drive, the Hall probe can be rotated and adjusted in the radial direction, which can easily adjust the measurement position of the Hall probe and is compatible with probes of different lengths, so as to achieve comprehensive and accurate measurement of the magnetic field strength of different regions between the upper and lower magnets. Attached Figure Description

[0052] Figure 1 An overall perspective view of the cyclotron magnetic field measuring device provided in an embodiment of the present invention;

[0053] Figure 2 A perspective view of the combination of the lower magnet, measuring frame, and upper motor provided in an embodiment of the present invention;

[0054] Figure 3 A top plan view of the combination of the lower turntable, measuring frame, slide table and upper magnet provided in an embodiment of the present invention;

[0055] Figure 4 A perspective view of the combination of the lower motor, upper motor, lower turntable, and upper turntable provided in an embodiment of the present invention;

[0056] Figure 5 A perspective view of the combination of rotating shaft, transmission shaft, lower turntable and upper turntable provided in an embodiment of the present invention;

[0057] Figure 6 A perspective view of the combination of the lower turntable, slide table and measuring frame provided in an embodiment of the present invention;

[0058] Figure 7 A perspective view of the support plate, bevel gear set, slide table and lead screw assembly provided in an embodiment of the present invention;

[0059] Figure 8 A cross-sectional plan view of the cyclotron magnetic field measuring device provided in an embodiment of the present invention;

[0060] Figure 9 Provided for embodiments of the present invention Figure 8 Schematic diagram of the structure at point A in the diagram;

[0061] Figure 10 Provided for embodiments of the present invention Figure 7 The structural diagram at point B in the diagram.

[0062] Explanation of reference numerals in the attached figures:

[0063] In the diagram: 1. Lower Dewar; 2. Lower Magnet; 3. Upper Dewar; 4. Upper Magnet; 5. Center Hole; 6. Connecting Plate; 7. Support Plate; 8. Lower Motor; 9. Rotating Shaft; 10. Lower Sleeve; 11. Fixed Plate; 12. Support Plate; 13. Flat Needle Roller Bearing; 14. Lower Turntable; 15. Measuring Frame; 16. Through Port; 17. Protective Cover; 18. Linear Guide Rail; 19. Support Base; 20. Driven Bevel Gear; 21. Lead Screw; 22. 23. Main bevel gear; 24. Stop block; 25. Slide table; 26. Impact block; 27. First micro switch; 28. Second micro switch; 29. ​​Probe rod; 30. Second Hall probe; 31. First Hall probe; 32. Bracket; 33. Reading head; 34. Grating ruler; 35. T-pan; 36. Upper sleeve; 37. Fixing frame; 38. Upper motor; 39. Drive shaft; 40. Limiting plate; 41. Upper turntable; 42. Connecting block. Detailed Implementation

[0064] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0065] like Figures 1 to 10 As shown, an embodiment of the present invention provides a cyclotron magnetic field measuring device, including a lower Dewar 1, a lower magnet 2 disposed within the lower Dewar 1, an upper Dewar 3, and an upper magnet 4 disposed within the upper Dewar 3. A central hole 5 is formed through the center of the upper magnet 4, the lower magnet 2, the lower Dewar 1, and the upper Dewar 3. An upper motor 37 is connected to the upper Dewar 3 via a connecting component, and a lower motor 8 is connected to the lower part of the lower Dewar 1 via a connecting component. The device also includes:

[0066] The adjustment unit is located between the upper magnet 4 and the lower magnet 2, and passes through the lower magnet 2 and the lower Dewar 1. It includes a drive adjustment component consisting of a bevel gear set and a lead screw 21 driven by the bevel gear set located between the upper magnet 4 and the lower magnet 2, and a slide table 24 threadedly connected to the lead screw 21. It also includes a detection component consisting of two probe rods 28 of different lengths symmetrically arranged on the slide table 24, a first Hall probe 30 and a second Hall probe 29. The lengths of the probe rods 28 are 20 cm and 42 cm, respectively. The end of one probe rod 28 is connected to the second Hall probe 29, and the end of the other probe rod 28 is connected to the first Hall probe 30, so as to comprehensively measure the magnetic field strength.

[0067] The support and rotating part is provided through the central hole 5 and connected to the adjustment part. It includes a support and driving member provided below the bevel gear set and connected to the lower motor 8, and a drive member provided above the bevel gear set and the drive member. The support and driving member are rotatably connected to avoid contact with the upper magnet 4 and to rotate and adjust the detection position of the Hall probe.

[0068] Specifically, a stop 23 is fixed to the outer side of the lead screw 21, and the stop 23 is close to the driven bevel gear 20 to facilitate the installation position of the positioning support 19. The lower Dewar 1 provides support and protection for the lower magnet 2 and also provides support for the upper Dewar 3, allowing the upper Dewar 3 to provide stable support for the upper magnet 4. There is a gap between the upper magnet 4 and the lower magnet 2, which provides installation and movement space for the slide table 24 and the probe 28. The upper Dewar 3 can provide stable support for the upper motor 37 through the connecting component, and the lower Dewar 1 can provide stable support for the connecting plate 6, allowing the connecting plate 6 to be supported by the support plate 7. The lower motor 8 provides stable support and can provide driving force to the bevel gear set, so that the bevel gear set can drive the lead screw 21 to rotate between the upper magnet 4 and the lower magnet 2. The lead screw 21 can push the slide table 24 to move by means of the thread. The slide table 24 can drive the probe 28 to move together, so that the probe 28 can drive the first Hall probe 30 and the second Hall probe 29 to move and adjust their positions between the upper magnet 4 and the lower magnet 2. The first Hall probe 30 is responsible for measuring the magnetic field near the center area of ​​the upper magnet 4 and the lower magnet 2, while the second Hall probe 29 is responsible for measuring the magnetic field in the non-center area of ​​the upper magnet 4 and the lower magnet 2.

[0069] The use of a high-precision lead screw 21 to replace the traditional gear and rack transmission improves transmission accuracy and stability and reduces wear.

[0070] In practical application, the operator can use fixed components to install the lower Dewar 1 at the work site, enabling the lower Dewar 1, upper Dewar 3, lower magnet 2, and upper magnet 4 to operate as a superconducting cyclotron accelerator. Before cyclotron acceleration, the operator can start the lower motor 8 as needed. The lower motor 8, supported by the support plate 7 and connecting plate 6, drives the bevel gear set, which in turn drives the lead screw 21. The rotational power and thread action of the lead screw 21 push the slide table 24 to slide and translate between the upper magnet 4 and the lower magnet 2, allowing the slide table 24 to move along with the probe rod 28. This, in turn, allows the probe rod 28 to move along with the first Hall probe 30 and the second Hall probe 29, enabling them to move to appropriate positions and measure the magnetic field in the central and non-central regions of the upper magnet 4 and the lower magnet 2.

[0071] In a preferred embodiment of the present invention, a connecting plate 6 is provided through the central hole 5 of the lower Dewar 1, and the connecting plate 6 is fixed to the outer wall of the lower Dewar 1 by a fixing component. A support plate 7 is connected to the lower part of the connecting plate 6 by a fixing component.

[0072] The lower motor 8 is fixed to the bottom of the support plate 7 via a connecting component;

[0073] The support plate 7 has a rotating shaft 9 that passes through it via a bearing, and the rotating shaft 9 moves through the central hole 5 of the connecting plate 6 and the lower dewar 1.

[0074] Specifically, the lower Dewar 1, upper Dewar 3, lower magnet 2, and upper magnet 4 provide space for the center hole 5. The center hole 5 provides a through channel for the connecting plate 6, lower sleeve 10, T-plate 34, and upper sleeve 35. The lower motor 8 can provide support for the rotating shaft 9 through the support plate 7 and the connecting plate 6. The support plate 7 and the connecting plate 6 provide a through channel and rotation space for the rotating shaft 9. The lower motor 8 can drive the rotating shaft 9 to rotate through the drive end. The connecting plate 6 and the lower sleeve 10 provide protection, through space, and rotation space for the rotating shaft 9, and prevent the rotating shaft 9 from contacting the lower magnet 2 and affecting the operation of the lower magnet 2. The lower sleeve 10 and the upper sleeve 35 are made of graphite.

[0075] The bevel gear set includes:

[0076] The main bevel gear 22 is fixed at the upper end of the rotating shaft 9 and moves through the solid plate 11;

[0077] Driven bevel gear 20 is fixed at one end of lead screw 21 and meshes with main bevel gear 22, and is engaged with main bevel gear 22 at a 90-degree angle;

[0078] The protective cover 17 is fixed on the lower turntable 14 and is located outside the main bevel gear 22 and the driven bevel gear 20.

[0079] Specifically, the rotating shaft 9 can provide stable support for the main bevel gear 22 and drive the main bevel gear 22 to rotate. The lead screw 21 can provide support for the driven bevel gear 20. The main bevel gear 22 can use rotational power and meshing action to drive the driven bevel gear 20 to rotate according to the direction of rotation. The driven bevel gear 20 can use rotational power to drive the lead screw 21 to rotate together.

[0080] In practical application, when the operator starts the motor 8 to drive the rotating shaft 9 to rotate, the rotating shaft 9 will rotate around the bearing set in the connecting plate 6 with the support of the connecting plate 6. The rotating shaft 9 will use the rotational power to drive the main bevel gear 22, so that the main bevel gear 22 can drive the driven bevel gear 20 to rotate with the meshing action. The driven bevel gear 20 can drive the lead screw 21 to rotate with the rotational power. The lead screw 21 can use the thread action and rotational power to push the slide table 24 to move according to the direction of rotation with the support of the support 19. The slide table 24 can drive the probe rod 28 to move together, so that the position of the first Hall probe 30 and the second Hall probe 29 can be adjusted through the probe rod 28, so that the first Hall probe 30 and the second Hall probe 29 can be adjusted to a suitable measurement position to measure the magnetic field.

[0081] In a preferred embodiment of the present invention, the support member includes:

[0082] The lower sleeve 10 is connected to the upper end of the connecting plate 6, and passes through the center hole 5 of the lower Dewar 1 and the lower magnet 2, and is located on the outside of the rotating shaft 9;

[0083] The support plate 12 is fixed to the upper end of the lower sleeve 10 and is located between the lower magnet 2 and the upper magnet 4.

[0084] Solid plate 11, with the central support plate 12 through it;

[0085] The rotating shaft 9 passes through the solid plate 11 via a bearing;

[0086] The swivel support component is rotatably mounted above the support plate 12.

[0087] Specifically, the connecting plate 6 can stably support the lower sleeve 10, the lower sleeve 10 can provide stable support for the support plate 12, the support plate 12 can provide support and a through channel for the fixed plate 11, and the fixed plate 11 can cooperate with the bearing to provide rotational support and a through channel for the rotating rod.

[0088] The spindle support components include:

[0089] A flat needle roller bearing 13 is embedded in the support plate 12;

[0090] The lower turntable 14 rotates to the outer side of the flat needle roller bearing 13, which is located outside the fixed plate 11.

[0091] Connecting block 41 is symmetrically fixed on the lower turntable 14.

[0092] Specifically, the support plate 12 can provide stable support for the flat needle roller bearing 13, the flat needle roller bearing 13 can provide rotational support for the lower turntable 14, the lower turntable 14 can provide stable support for the connecting block 41, and can drive the connecting block 41 to rotate together under the action of external force, while the connecting block 41 can provide stable support for the upper turntable 40.

[0093] The driver includes:

[0094] The drive shaft 38 is connected to the drive end of the upper motor 37, and rotates through the T-disc 34 via a bearing, and movably passes through the upper sleeve 35;

[0095] The limiting plate 39 is fixed at the lower end of the drive shaft 38;

[0096] The upper turntable 40 is fixed to the lower end of the limit plate 39 by a connecting component and is fixedly connected to the connecting block 41.

[0097] Specifically, the upper motor 37, supported by the fixed frame 36, provides support for the drive shaft 38 via its drive end and drives the drive shaft 38 to rotate. The drive shaft 38 provides support for the limiting plate 39, which provides installation space for the upper turntable 40 and provides stable support for the upper turntable 40 under the support of the drive shaft 38. It also drives the upper turntable 40 to rotate together. The upper turntable 40 can then transmit the rotational power generated by the upper motor 37 to the connecting block 41, so that the connecting block 41 can use external force to push the lower turntable 14 to rotate on the flat needle roller bearing 13 with the flat needle roller bearing 13 as the center.

[0098] In practical application, the operator can control the upper motor 37 according to actual needs. The upper motor 37, supported by the fixed frame 36, drives the transmission shaft 38 to rotate inside the upper sleeve 35T plate 34. The transmission shaft 38, in turn, uses rotational power to drive the limiting plate 39 to rotate between the lower magnet 2 and the upper magnet 4. This allows the limiting plate 39 to drive the upper turntable 40 to rotate as well. The upper turntable 40, through the connecting block 41, uses external force to drive the lower turntable 14 to rotate around the flat needle roller bearing 13, supported by the support plate 12. Simultaneously, the lower turntable 14 uses external force to drive the protective cover 17, the measuring frame 15, and all components connected to the measuring frame 15 to rotate together, allowing the measuring frame 15 to pass through the slide table. 24 drives the probe rod 28, the first Hall probe 30 and the second Hall probe 29 to rotate around the center hole 5 to adjust the position of the magnetic field measurement, making the detection work more flexible and comprehensive. The connecting plate 6, supported by the lower Dewar 1, provides support for the upper turntable 40 and the limiting plate 39 through the lower sleeve 10, the support plate 12, the flat needle roller bearing 13, the lower turntable 14 and the connecting block 41, so that the upper turntable 40 and the limiting plate 39 can maintain a gap with the upper magnet 4. The support plate 12 and the flat needle roller bearing 13 maintain a gap between the lower turntable 14 and the lower magnet 2, avoiding friction with the upper magnet 4 or the lower magnet 2 when adjusting the position of the first Hall probe 30 and the second Hall probe 29, and avoiding affecting the life of the upper magnet 4 and the lower magnet 2.

[0099] In a preferred embodiment of the present invention, the detector includes:

[0100] The measuring frame 15 is fixed on the lower turntable 14;

[0101] The opening 16 penetrates the measuring frame 15 and is located outside the protective cover 17;

[0102] Linear guide rail 18 is fixed on measuring frame 15 and is guidedly connected to slide table 24;

[0103] The measuring components are mounted on the measuring frame 15 and connected to the slide table 24;

[0104] The auxiliary measuring parts are mounted on the slide table 24.

[0105] Specifically, the lower turntable 14 provides stable support for the measuring frame 15, the measuring frame 15 provides opening space for the through 16, the through 16 provides a through passage for the protective cover 17 and provides moving space for the slide table 24, the measuring frame 15 provides stable support for the linear guide rail 18, and the linear guide rail 18 provides sliding guidance for the slide table 24, so that the slide table 24 can move linearly along the linear guide rail 18 under the push of the lead screw 21.

[0106] The protective components include:

[0107] Support 19 is fixed on measuring frame 15 and is threaded through by lead screw 21;

[0108] The impact blocks 25 are symmetrically fixed on both sides of the slide table 24;

[0109] The first micro switch 26 and the second micro switch 27 are fixed on the measuring frame 15. The first micro switch 26 is close to the end of the lead screw 21 away from the protective cover 17, and the second micro switch 27 is close to the protective cover 17.

[0110] Specifically, the measuring frame 15 provides stable support for the support base 19, which in turn provides stable support for the lead screw 21, thus fixing the lead screw 21 and allowing it to use rotational power to move the slide table 24. The slide table 24 provides stable support for the impact block 25. The impact block 25 closer to the protective cover 17 has a length of thirteen millimeters, and the impact block 25 further away from the protective cover 17 has a length of three centimeters. The measuring frame 15 also provides stable support for the first micro switch 26 and the second micro switch 27. The impact block 25 can replace the slide table 24 in contacting the first micro switch 26 and the second micro switch 27.

[0111] Sub-test parts include:

[0112] The bracket 31 is fixed on the slide table 24 and is located between the two probes 28;

[0113] The reading head 32 is fixed to one end of the bracket 31;

[0114] The grating ruler 33 is connected to the lower end of the reading head 32.

[0115] Specifically, the slide 24 can provide stable support for the bracket 31, the bracket 31 can provide support for the reading head 32, the reading head 32 can stably support the grating ruler 33, and the length of the grating ruler 33 can cover the corresponding positions of the two probes 28. The grating ruler 33 and the reading head 32 work together to provide position feedback of the first Hall probe 30 and the second Hall probe 29 during the magnetic field measurement process, thereby realizing a closed loop.

[0116] Drive adjustment components include:

[0117] T-disk 34 is set through the central hole 5 of the upper Dewar 3 and is connected to the outer wall of the upper Dewar 3;

[0118] The upper sleeve 35 is set through the center hole 5 of the upper magnet 4 and is connected to the lower end of the T disk 34;

[0119] Fixing bracket 36 is fixed to the outer wall of the upper Dewar 3;

[0120] The upper motor 37 is fixed on the mounting bracket 36.

[0121] Specifically, the T-plate 34, upper sleeve 35, lower sleeve 10, connecting plate 6, rotating shaft 9, and transmission shaft 38 work together to allow the upper motor 37 and lower motor 8 to be installed outside the upper Dewar 3 and lower Dewar 1, avoiding the motor from being affected by the magnetic field. They can also replace the traditional inner and outer nested rotating shaft 9, reducing system complexity, improving reliability and maintenance convenience, and improving transmission efficiency and stability.

[0122] The upper Dewar 3 provides stable support for the T-disk 34, which in turn provides stable support for the upper sleeve 35. The center hole 5 allows the upper magnet 4 to provide a through-passage for the upper sleeve 35, and the center hole 5 allows the upper Dewar 3 to provide a through-passage for the T-disk 34. The upper sleeve 35 is made of graphite to prevent the drive shaft 38 from affecting the operation of the upper magnet 4. The upper Dewar 3 provides stable support for the fixing frame 36, which in turn provides stable support for the upper motor 37.

[0123] In practical application, the 13mm impact block 25 can trigger the first micro switch 26 after the slide table 24 moves close to the protective cover 17, causing the motor 8 to stop running under the control of the first micro switch 26. The 3cm impact block 25 can trigger the second micro switch 27 after the slide table 24 moves close to the support 19 away from the protective cover 17, causing the motor 8 to stop running under the control of the second micro switch 27 again. This prevents the slide table 24 from moving beyond its limit, thus protecting the first Hall probe 30 and the second Hall probe 29 from damage caused by excessive movement. The slide table 24 is driven by the lead screw 21 to adjust the positions of the first Hall probe 30 and the second Hall probe 29. When the slide table 24 moves together with the support 31, the support 31 can move the reading head 32 to move together. The reading head 32 can then move the grating ruler 33 together under the action of external force. The surface of the grating ruler 33 is engraved with periodic nanoscale lines to form an optical grating. The reading head 32 has a built-in photoelectric sensor that emits infrared light to illuminate the grating ruler 33 and receives reflected and transmitted light signals to detect the changes in moiré fringes caused by the movement of the lines. The reading head 32 converts the changes in light intensity caused by the movement of the grating ruler 33 into electrical signals and transmits them to the controller. This allows the grating ruler 33 to continuously cooperate with the reading head 32 to provide feedback on the corresponding positions of the first Hall probe 30 and the second Hall probe 29 during the measurement process.

[0124] Working principle: The lower Dewar 1 is installed in the working position of the superconducting cyclotron accelerator by fixing components to ensure that the upper and lower Dewar 1 and the magnet system are in a stable state;

[0125] The lower motor 8 cooperates with the rotating shaft 9 to provide vertical axial driving force, and the upper motor 37 cooperates with the transmission shaft 38 to provide rotational driving force. When the lower motor 8 is started, the rotating shaft 9 drives the main bevel gear 22 to rotate. The power is converted to the horizontal direction through the driven bevel gear 20 with a 90-degree mesh. The driven bevel gear 20 drives the lead screw 21 to rotate. Under the support of the support seat 19, the slide table 24 is pushed to move along the linear guide rail 18 through the action of the screw.

[0126] The slide table 24 drives the probe rod 28 to move synchronously. The first Hall probe 30 detects the magnetic field in the central area, and the second Hall probe 29 covers the edge area. The grating ruler 33 and the reading head 32 work together to provide real-time feedback on the positions of the first Hall probe 30 and the second Hall probe 29, forming a closed-loop control.

[0127] When the slide table 24 moves to the limit position, the block 25 triggers the corresponding micro switch, forcibly cutting off the power supply of the lower motor 8. The protection range covers the entire stroke of the lead screw 21 (from the end of the cover 17 to the end of the support 19).

[0128] Start the upper motor 37, which drives the limit plate 39 and the upper turntable 40 to rotate through the transmission shaft 38. The upper turntable 40 drives the lower turntable 14 to rotate on the plane needle roller bearing 13 through the connecting block 41, which can realize the 360-degree rotation adjustment of the measuring frame 15 and the probe 28 around the axis of the central hole 5.

[0129] The two-dimensional distribution measurement of the magnetic field is achieved by combining the linear movement and rotation of the first Hall probe 30 and the second Hall probe 29. The first Hall probe 30 focuses on monitoring the magnetic field uniformity in the core area, while the second Hall probe 29 detects the attenuation characteristics of the magnetic field at the edge.

[0130] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A cyclotron magnetic field measuring device comprising a lower Dewar, a lower magnet disposed inside the lower Dewar, an upper Dewar, and an upper magnet disposed inside the upper Dewar, wherein a central hole is formed through the centers of the upper magnet, the lower magnet, the lower Dewar, and the upper Dewar, wherein an upper motor is connected to the upper Dewar by a connecting member, and wherein a lower motor is connected to the lower Dewar by a connecting member, characterized in that, Also include: The adjusting and detecting part is arranged between the upper magnet and the lower magnet, and penetrates the lower magnet and the lower Dewar, which includes a driving adjusting element composed of a worm gear set and a worm gear set arranged between the upper magnet and the lower magnet, and a detecting element composed of a slide table threadedly connected with the worm, and two different length detecting rods and a first Hall probe and a second Hall probe symmetrically arranged on the slide table, the length of the detecting rods are twenty centimeters and forty-two centimeters respectively, one end of one of the detecting rods is connected with the second Hall probe, and one end of the other detecting rod is connected with the first Hall probe, so as to comprehensively measure the magnetic field strength; The supporting and rotating part is arranged through the central hole and connected with the adjusting and detecting part, which includes a supporting driving element arranged below the worm gear set and connected with the lower motor, and a rotating driving element arranged above the worm gear set and the driving adjusting element, the supporting driving element and the rotating driving element are rotationally connected to avoid contacting with the upper magnet and rotating the detecting position of the Hall probe; The auxiliary measuring part includes: The support is fixed on the slide table and located between the two detecting rods; The reading head is fixed on one end of the support; The grating ruler is connected to the lower end of the reading head; The supporting driving element includes: The lower sleeve is connected to the upper end of the connecting disc, penetrates the central hole of the lower Dewar and the lower magnet, and is located outside the rotating shaft; The supporting disc is fixed on the upper end of the lower sleeve and located between the lower magnet and the upper magnet; The fixed disc is arranged through the center of the supporting disc; The rotating shaft penetrates the fixed disc through the bearing; The rotating supporting part is rotationally arranged above the supporting disc.

2. The cyclotron magnetic field measuring device of claim 1, wherein The connecting disc is arranged through the central hole of the lower Dewar and fixed on the outer wall of the lower Dewar through the fixing element, the lower side of the connecting disc is connected with the supporting disc through the fixing element; The lower motor is fixed below the supporting disc through the connecting element; The rotating shaft is rotationally arranged through the inside of the supporting disc through the bearing, and the rotating shaft is movably arranged through the central hole of the connecting disc and the lower Dewar.

3. The cyclotron magnetic field measuring device of claim 2, wherein, The rotating supporting part includes: The plane needle roller bearing is embedded on the supporting disc; The lower rotating disc is rotationally arranged outside the plane needle roller bearing and outside the fixed disc; The connecting block is symmetrically fixed on the lower rotating disc.

4. The cyclotron magnetic field measuring device of claim 3, wherein The worm gear set includes: The main bevel gear is fixed on the upper end of the rotating shaft and movably arranged through the fixed disc; The driven bevel gear is fixed on one end of the screw rod, engaged with the main bevel gear, and cooperated with the main bevel gear at an angle of ninety degrees; The shield is fixed on the lower rotating disc and located outside the main bevel gear and the driven bevel gear.

5. The cyclotron magnetic field measuring device of claim 4, wherein, The detecting element includes: The measuring frame is fixed on the lower rotating disc; The through hole is arranged through the measuring frame and located outside the shield; The linear guide rail is fixed on the measuring frame and connected with the slide table; The measuring and shielding part is arranged on the measuring frame and connected with the slide table; The auxiliary measuring part is arranged on the slide table.

6. The cyclotron magnetic field measuring device of claim 5, wherein, The measuring and shielding part includes: The supporting seat is fixed on the measuring frame and threaded by the screw rod; The stop block is symmetrically fixed on both sides of the slide table; The first micro switch and the second micro switch are fixed on the measuring frame, the first micro switch is close to the end of the screw rod away from the shield, and the second micro switch is close to the shield.

7. The cyclotron magnetic field measuring device of claim 6, wherein, The driving adjusting element includes: The T disc is arranged through the central hole of the upper Dewar and connected with the outer wall of the upper Dewar; The upper sleeve is arranged through the center hole of the upper magnet and connected with the lower end of the T-shaped disc; The fixed frame is fixed on the outer wall of the upper Dewar; The upper motor is fixed on the fixed frame.

8. The cyclotron magnetic field measuring device of claim 1, wherein, The driving element comprises: The transmission shaft is connected with the driving end of the upper motor and rotatably arranged through the T-shaped disc and movably arranged through the upper sleeve; The limiting disc is fixed on the lower end of the transmission shaft; The upper rotating disc is fixed on the lower end of the limiting disc through the connecting component and fixedly connected with the connecting block.

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