Low energy beam transport line

Abstract

This invention discloses a low-energy beam transmission line, comprising: a single solenoid having a channel; a first movable component connected to the single solenoid to allow the single solenoid to move along the beam transmission direction; and a vacuum accelerating tube, with a first end connected to an ion source and a second end passing through the channel and connected to an accelerator. This invention's low-energy beam transmission line, by incorporating a movable single solenoid, increases the adjustable degrees of freedom of the solenoid, enabling dual-degree-of-freedom adjustment (spatial position and magnetic field strength), thus significantly improving beam matching capability.

Description

Technical Field

[0001] This utility model relates to the technical field of particle accelerators, and in particular to a low-energy beam transmission line. Background Technology

[0002] Accelerator neutron sources are widely used in nuclear medicine (such as boron neutron capture therapy) due to their advantages of short construction cycles, high neutron yields, and good safety. In their accelerator systems, a low-energy beam transport line (LEBT) is required between the ion source and the accelerator to transmit the initial beam with energies on the order of keV, and to perform critical tasks such as beam parameter adjustment, impurity ion separation, and beam state diagnosis.

[0003] Due to its ability to avoid the risk of high-voltage arcing and its flexible spatial layout, magnetic focusing (solenoid focusing) has become the mainstream solution for LEBT (Low-Earth Beam Transmission). The beam divergence / convergence state is adjusted by regulating the magnetic field strength through a solenoid. Based on the number of solenoids, LEBTs are classified into three types: single-sole LEBT, double-sole LEBT, and multi-sole LEBT.

[0004] The single-sowary LEBT has a compact structure, but because the assembly position of the solenoid is fixed, the single-sowary LEBT structure can only adjust one parameter of magnetic field strength, resulting in weak beam matching capability and making it unsuitable for use in scenarios with varying beam divergence.

[0005] Dual-sole LEBTs and multi-sole LEBTs achieve parameter adjustment of two or more magnetic field strengths by increasing the number of solenoids, but this results in excessively long spatial structures, typically ranging from 1.4m to 2m. Excessive length in dual-sole and multi-sole LEBTs not only prolongs particle flight time and reduces beam matching efficiency, but also increases the number of solenoids and associated equipment, significantly raising manufacturing costs.

[0006] In summary, while single-sole LEBTs are compact, their insufficient adjustment capability makes them impractical due to functional limitations; double / multi-sole LEBTs have strong adjustment capabilities, but their bulky and complex structure leads to poor economic efficiency.

[0007] Therefore, this invention proposes a low-energy beam transmission line. Utility Model Content

[0008] The purpose of this invention is to provide a low-energy beam transmission line. By setting a movable single solenoid, the adjustable degree of freedom of the single solenoid can be increased, thereby enabling the single solenoid to achieve dual degree of freedom adjustment (such as spatial position and magnetic field strength). By changing the spatial position of the single solenoid, the beam divergence / convergence state is compensated, and the beam matching capability is significantly improved.

[0009] The degrees of freedom mentioned in this invention refer to the adjustable degrees of freedom of a single solenoid. Furthermore, the dual degrees of freedom mentioned in this invention include two adjustable degrees of freedom: a first degree of freedom and a second degree of freedom. The first degree of freedom is the magnetic field strength of the single solenoid, and the second degree of freedom is the spatial position of the single solenoid.

[0010] The objective of this utility model is achieved through the following technical solution:

[0011] On the one hand, this utility model provides a low-energy beam transmission line, comprising:

[0012] A single solenoid, wherein a channel is provided in the single solenoid;

[0013] A first movable component is connected to the single solenoid so that the single solenoid is movable along the beam transmission direction;

[0014] A vacuum accelerator tube, wherein the first end of the vacuum accelerator tube is connected to an ion source, and the second end of the vacuum accelerator tube passes through the channel and is connected to an accelerator.

[0015] Furthermore, the moving distance of the single solenoid along the beam transmission direction is (0, 400 mm).

[0016] Furthermore, the moving distance of the single solenoid along the beam transmission direction is (0, 60 mm).

[0017] Furthermore, the first moving component includes:

[0018] The first guide rail is located on the outside of the single solenoid and is arranged along the beam transmission direction.

[0019] A first slider, the first side of which is slidably connected to the first guide rail, and the second side of which is connected to the single solenoid.

[0020] Furthermore, the first moving component also includes:

[0021] A first driving element, connected to the first slider, is used to drive the first slider to move along the first guide rail in the beam transmission direction.

[0022] Furthermore, the low-energy beam transmission line is mounted on a bracket; the first guide rail is mounted on the bracket.

[0023] Furthermore, the first slider has a first groove on its first side that matches the first guide rail, and the first slider is slidably connected to the first guide rail through the first groove.

[0024] Furthermore, the first moving component also includes a support member disposed between the first slider and the single solenoid.

[0025] Furthermore, the support member includes:

[0026] One or more support columns, the support end of which is connected to the single solenoid, and the connecting end of which is connected to the first slider.

[0027] Furthermore, the support member also includes:

[0028] A substrate, the first side of which is connected to the connecting end of the support column, and the second side of which is connected to the first slider.

[0029] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0030] This invention, through the coordinated arrangement of a single solenoid, a moving component, and a vacuum accelerating tube, enables the single solenoid to move along the beam transmission direction, thereby increasing the adjustable degree of freedom of the single solenoid, i.e., adding a second degree of freedom. This allows the single solenoid to achieve dual-degree-of-freedom adjustment (such as spatial position and magnetic field strength), which can significantly improve the beam matching capability.

[0031] Furthermore, the low-energy beam transmission line of a traditional dual-sole is 1.4m to 2m long. This invention, by setting a movable single-sole, can shorten the length of the low-energy beam transmission line, reduce particle flight time, and improve beam matching efficiency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a low-energy beam transmission line according to an embodiment of the present invention.

[0033] Figure 2 yes Figure 1 A in the middle.

[0034] Figure 3 This is a schematic diagram of another structure of the low-energy beam transmission line according to an embodiment of the present invention.

[0035] Figure 4 yes Figure 3 C in the middle.

[0036] Figure 5 This is a schematic diagram of another structure of the low-energy beam transmission line according to an embodiment of the present invention.

[0037] Figure 6 yes Figure 5 B in the middle.

[0038] In the figure: 1. Ion source; 2. Faraday cup; 3. First vacuum pump; 4. Second vacuum pump; 5. Single solenoid; 6. Support; 7. First guide rail; 8. Second slider; 9. First moving component; 10. Second guide rail; 11. Second moving component; 12. First slider; 13. Vacuum acceleration tube; 51. Channel; 91. Support; 100. First drift section; 200. Second drift section; 911. Support column; 912. Substrate. Detailed Implementation

[0039] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0040] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0041] In existing technologies, low-energy beam transmission lines with single solenoids can only adjust the beam current by regulating the magnetic field strength, resulting in limited beam current regulation capability. Low-energy beam transmission lines with dual-sole or multi-sole structures suffer from excessively long spatial structures, leading to excessively long particle flight times within the low-energy beam transmission line segment, which is detrimental to beam matching. This invention provides a low-energy beam transmission line.

[0042] The degrees of freedom mentioned in this invention refer to the adjustable degrees of freedom of the single solenoid in the low-energy beam transmission line. Furthermore, the dual degrees of freedom mentioned in this invention include two adjustable degrees of freedom: a first degree of freedom and a second degree of freedom. The first degree of freedom is the magnetic field strength of the single solenoid, and the second degree of freedom is the spatial position of the single solenoid.

[0043] refer to Figure 1 The low-energy beam transmission line of this utility model includes: a single solenoid 5, a first moving component 9, and a vacuum accelerating tube 13.

[0044] The first moving component 9 of this utility model is mounted on the bracket 6. The first moving component 9 is connected to the single solenoid 5 and drives the single solenoid 5 to move along the beam transmission direction.

[0045] The first moving component 9 of this invention is connected to the single solenoid 5, so that the single solenoid 5 can move back and forth along the beam transmission direction. Furthermore, the single solenoid 5 is provided with a channel 51, the first end of the vacuum accelerating tube 13 is connected to the ion source 1, and the second end of the vacuum accelerating tube 13 passes through the channel 51 and is connected to an accelerator (not shown).

[0046] In practical applications, the single solenoid 5 moves a distance (0-400mm) along the beam transmission direction. That is, the single solenoid 5 can move a certain distance (0-400mm) along the beam transmission direction (i.e., the axial direction of the vacuum accelerator tube 13). Preferably, the single solenoid 5 moves a distance (0-60mm) along the beam transmission direction.

[0047] The moving distance is the straight-line distance between the single solenoid 5 from the first moving termination position to the second displacement termination position (excluding the length of the single solenoid 5 itself); wherein, the first moving termination position is the termination position corresponding to the single solenoid 5 moving towards the ion source 1, and the second displacement termination position is the termination position corresponding to the single solenoid 5 moving towards the accelerator.

[0048] Traditional single solenoids 5 can only adjust their magnetic field strength, resulting in poor adaptability to changes in beam parameters. This invention, by incorporating a movable single solenoid 5, not only adjusts its magnetic field strength but also its spatial position, achieving dual-degree-of-freedom adjustment. Specifically, by altering the spatial position and magnetic field strength of the single solenoid 5, the beam divergence / convergence state is adjusted, significantly improving beam matching capabilities.

[0049] refer to Figure 2 The first moving component 9 of this utility model includes: a first guide rail 7, a first slider 12, and a first driving component.

[0050] The first guide rail 7 of this utility model is located on the outside of the single solenoid and is arranged along the beam transmission direction. It can ensure that the magnetic field does not deflect when the single solenoid moves along the beam transmission direction, thus avoiding beam distortion.

[0051] In some embodiments, the upper surface of the bracket 6 is provided with an outward protrusion or an inward groove to form a first guide rail 7, and the central axis of the first guide rail 7 is parallel to the beam transmission direction.

[0052] In some embodiments, the first guide rail 7 is disposed on the bracket 6, which is used to assemble the low-energy beam transmission line.

[0053] refer to Figure 3The first slider 12 of this utility model includes a first side and a second side arranged opposite to each other. The first side is slidably connected to the first guide rail 7, and the second side is connected to the single solenoid 5, which can drive the single solenoid 5 to move along the beam transmission direction.

[0054] In some embodiments, reference Figure 4 The first slider 12 has a first groove (not shown) on its first side that matches the first guide rail 7. The first groove engages with the first guide rail 7, allowing the first slider 12 to slide slidably connect with the first guide rail 7 via the first groove. In some embodiments, the single solenoid 5 is connected to the second side of the first slider 12 via bolt fasteners, and the first side of the first slider 12 is slidably connected with the first guide rail 7. The single solenoid 5 is slidably connected with the first guide rail 7 via the first slider 12.

[0055] The first driving component of this invention is connected to the first slider 12 and is used to drive the first slider 12 to move along the first guide rail 7 in the beam transmission direction. In some embodiments, the first driving component can be a stepper motor or a servo motor, which drives the first slider 12 to move along the first guide rail 7 in the beam transmission direction, thereby driving the single solenoid 5 to move in the beam transmission direction.

[0056] The first moving component 9 of this utility model may further include a support member 91. The support member 91 is disposed between the first slider 12 and the single solenoid 5.

[0057] In some embodiments, the support member 91 of this invention includes one or more support columns 911 arranged at equal intervals. Each support column 911 includes a support end (not shown) and a connecting end (not shown) arranged opposite to each other, wherein the support end is connected to a single solenoid 5, and the connecting end is connected to a first slider 12. Further, the support member 91 of this invention also includes a substrate 912. The substrate 912 includes a first surface (not shown) and a second surface (not shown) arranged opposite to each other, wherein the first surface is connected to the connecting end of the support column, and the second surface is connected to the first slider 12.

[0058] refer to Figure 5 The low-energy beam transmission line of this invention further includes: a first drift section 100 and a second drift section 200. The first drift section 100 is a drift section assembly corresponding to the vacuum accelerating tube on the input side of the single solenoid 5; the second drift section 200 is a drift section assembly corresponding to the vacuum accelerating tube on the output side of the single solenoid 5.

[0059] In some embodiments, the first drift segment 100 is the flight section from the ion source 1 to the single solenoid 5 via the extraction electrode. A Faraday cup 2 is provided in the first drift segment 100 to measure the beam current intensity of the first drift segment 100 and to quickly cut off the beam transmission of the first drift segment 100.

[0060] In some embodiments, the first drift section 100 is provided with a first vacuum pump 3, which makes the beam of the first drift section 100 exist in a vacuum environment.

[0061] In some embodiments, the second drift section 200 is the flight section from the single solenoid 5 to the accelerator inlet. Some diagnostic elements are provided in the second drift section 200, such as: beam deflection elements, impurity ion removal elements, and beam current intensity testing devices.

[0062] In some embodiments, a beam chopper is used as a beam deflection element to modulate the beam of the second drift segment 200 or to generate a pulsed beam of the second drift segment 200, thereby obtaining a microsecond-level pulsed beam to match the RF cycle of the accelerator.

[0063] In some embodiments, an absorption cone is used as an element for removing impurity ions from the second drift section 200 to improve beam purity.

[0064] In some embodiments, an alternating current transformer (ACCT) is used as a beam current intensity testing device to measure the beam current intensity of the second drift section 200, so that the beam can meet the target parameter requirements when it reaches the accelerator inlet.

[0065] In some embodiments, the second drift section 200 is provided with a second vacuum pump 4, which makes the beam of the second drift section 200 exist in a vacuum environment.

[0066] The single solenoid 5 of this invention is used to focus the beam.

[0067] In some specific embodiments, when using the low-energy beam transmission line with a single solenoid 5 of this invention, the beam parameters are detected to determine whether the beam state is divergent or convergent. The divergent state of the beam can be changed to a convergent state, or vice versa, by increasing or decreasing the magnetic induction intensity of the single solenoid 5 within a certain range (e.g., the magnetic field strength is adjustable from 0.1T to 0.3T). It is then determined whether the beam parameters meet the target parameter requirements. If adjusting the magnetic induction intensity of the single solenoid 5 still fails to meet the target parameter requirements, the single solenoid 5 can be moved along the beam transmission direction to adjust the beam state by adjusting the spatial position of the single solenoid 5, thereby ensuring that the beam parameters meet the target parameter requirements.

[0068] In some specific embodiments, the present invention can adjust the state of the beam by adjusting the magnetic induction intensity and spatial position of the single solenoid 5 a limited number of times, so that the parameters of the beam meet the target parameter requirements.

[0069] refer to Figure 5 The low-energy beam transmission line of this invention may further include a second moving component 11. The second moving component 11 enables the docking of the second drift section 200 with the accelerator.

[0070] The second moving component 11 of this utility model can be a roller disposed at the bottom of the bracket 6, or it can be an assembly formed by the second guide rail 10, multiple second sliders 8, and a second driving component. (Refer to...) Figure 6 .

[0071] The second slider 8 of this invention includes a third side (not shown) and a fourth side (not shown) disposed opposite to each other. The third side of the second slider 8 is connected to at least one of the first drift segment 100, the solenoid structure, or the second drift segment 200. The fourth side of the second slider 8 is slidably connected to a second guide rail 10, which is mounted on a bracket 6, and its central axis is parallel to the beam transmission direction. A second driving member is connected to the second slider 8 and is used to drive the second slider 8 to move along the second guide rail 10 in the beam transmission direction, thereby causing the first drift segment 100, the solenoid structure, or the second drift segment 200 to move in the beam transmission direction. The second driving member can be a stepper motor or a servo motor. Furthermore, the second driving member can be reused as the first driving member.

[0072] In some embodiments, the third side of the second slider 8 is connected to the bottom of the second drift segment 200 by bolt fasteners; the fourth side of the second slider 8 is provided with a second groove (not shown) that matches the shape of the second guide rail 10, and the second groove engages with the second guide rail 10, so that the second slider 8 is slidably connected to the second guide rail 10 through the second groove. The second driving member drives the second slider 8 to move along the second guide rail 10 in the beam transmission direction, thereby moving the second drift segment 200 in the beam transmission direction, realizing the docking of the second drift segment 200 with the accelerator, and reducing the docking difficulty.

[0073] In some embodiments, the upper surface of the bracket 6 of this invention may protrude outward or be recessed inward to form a second guide rail 10, and the central axis of the second guide rail 10 is parallel to the beam transmission direction.

[0074] In some embodiments, the present invention can adjust the emittance and Twiss parameters by changing the magnetic field strength and spatial position of the single solenoid 5, so that the beam parameters can meet the target parameter requirements when the beam reaches the accelerator inlet.

[0075] The target parameters include emissivity and Twiss parameters.

[0076] Specifically, emittance reflects the phase volume occupied by the beam in phase space. The larger the parameter value corresponding to emittance, the more divergent the beam.

[0077] The Twiss parameters include the α parameter and the β parameter. The α parameter reflects the divergence or convergence state of the beam: when α > 0, the beam is convergent; when α < 0, the beam is divergent; when α = 0, the beam is in a waist (or collimated) state, its lateral dimension reaches an extreme value (usually a minimum), and there is no instantaneous divergence or convergence tendency. The β parameter measures the lateral width occupied by the beam.

[0078] To make the objectives, technical solutions, and advantages of this utility model clearer, the low-energy beam transmission line of this utility model is simulated using Tracewin software, and specific embodiments are provided to further illustrate this utility model in detail. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.

[0079] Example 1

[0080] This embodiment verifies the beam current matching of a low-energy beam transmission line. A single solenoid 5 is positioned between the first movement termination position and the second displacement termination position.

[0081] (1) Parameters of the beam current at the outlet of ion source 1, i.e., parameters of the beam current drawn from the ion source:

[0082] The energy is 35 keV;

[0083] Twiss parameter: α j =-2.0, β j =0.15mm·π -1 ·mrad -1；

[0084] Normalized emittance: ε j = 0.2π·mm·mrad.

[0085] (2) Target parameters of the beam, i.e., the required parameter values ​​at the accelerator inlet:

[0086] Twiss parameter: α j0 =1.11, β j0 =0.0595mm·π -1 ·mrad -1 ;

[0087] Normalized emission: ε j0 <0.3π·mm·mrad.

[0088] (3) Matching was simulated using Tracewin software to adjust the beam parameters at the outlet of ion source 1 to the target beam parameters. The initial parameters for the simulated matching were: magnetic induction intensity of single solenoid 5: 0.237T; matching length of the first drift segment 100: 0.282m; total length of LEBT: 1.07m; beam transmission efficiency: 100%, with no particle loss.

[0089] The parameters of the matched beam are detailed in Table 1. The mismatch degree in Table 1 is calculated based on the Twiss parameters, and the calculated mismatch degree is used to determine whether the beam parameters meet the target parameter requirements. When the mismatch degree is greater than or equal to a preset threshold, the beam parameters meet the target parameter requirements. The preset threshold can be

[10] . -4 10 -3 ], or 10 -3 Or 10 -4 The preset threshold in this embodiment is 10. -4 .

[0090] Table 1

[0091] Twiss parameters X direction Y direction Parameter α value 1.107 1.105 Parameter β value 0.060 0.060 Mismatch degree (M) <![CDATA[2.40×10 -3 ]]> <![CDATA[2.40×10 -3 ]]>

[0092] Furthermore, the beam envelope in the matched state is stable and does not diverge, and the simulated beam particle distribution before entering the accelerator is concentrated and well matched.

[0093] Based on the parameter settings of Example 1, the fault tolerance verification of the position movement of the single solenoid 5 of the LEBT provided in this application is performed.

[0094] (1) Moving the single solenoid 5 30 mm towards the ion source 1, the fluctuation of parameter α is <0.5%, and the fluctuation of parameter β is <1%; based on this, the mismatch degree M is still ≤3.0×10 -3 This demonstrates that by adjusting the position of the single solenoid, the magnetic field strength can be adjusted while ensuring that the mismatch degree M meets the requirements. (2) Move the single solenoid 5 30mm toward the accelerator direction, the maximum offset of the beam envelope is <0.1mm, and the transmission efficiency remains at 100%.

[0095] It can be seen that the single solenoid 5 completely covers the beam disturbance tolerance within a movement distance of ±30mm. By adjusting the position of the single solenoid 5, it can replace the function of the double solenoid / multi-sole.

[0096] Based on the parameter settings of Example 1, the LEBT provided in this application was subjected to a disturbance, resulting in an increase in beam divergence, and dynamic adjustment verification was performed.

[0097] (1) Disturbance parameter: α 扰动 =-1.8, β 扰动=0.13mm·π -1 ·mrad -1 .

[0098] (2) Adjustment measures:

[0099] The magnetic induction intensity of the single solenoid 5 is adjusted to 0.237T;

[0100] Move the single solenoid 5 10mm toward the accelerator so that the matching length of the first drift segment 100 changes from 0.282m to 0.292m.

[0101] (3) Matching results

[0102] Mismatch degree: M xx = 1.00 × 10 -3 M yy = 1.00 × 10 -4 Among them, M xx ' represents the matching degree in the X direction; M yy ' represents the matching degree in the Y direction.

[0103] Based on the parameter settings of Example 1, the LEBT provided in this application was subjected to a disturbance, resulting in severe beam divergence. Dynamic adjustment verification was then performed.

[0104] (1) Disturbance parameter: α 扰动 = -1.7.

[0105] (2) Adjustment measures:

[0106] The magnetic induction intensity of the single solenoid 5 is adjusted to 0.230T;

[0107] Move the single solenoid 5 30mm toward the accelerator so that the matching length of the first drift segment 100 changes from 0.282m to 0.310m.

[0108] (3) Matching results

[0109] Mismatch degree: M xx = 8.86 × 10 -4 M yy =5.00×10 -3 .

[0110] As can be seen from the above embodiments, the single solenoid of a traditional low-energy beam transmission line can only adjust one degree of freedom (magnetic field strength), resulting in poor adaptability to changes in beam parameters. The low-energy beam transmission line of this invention, by incorporating a movable single solenoid, allows the solenoid to move along the beam transmission direction, increasing the degree of freedom (second degree of freedom) for position adjustment. This enables the single solenoid of the low-energy beam transmission line to achieve dual-degree-of-freedom adjustment (such as spatial position and magnetic field strength), significantly improving beam matching capability. Furthermore, the low-energy beam transmission line provided in this application is shorter than existing low-energy beam transmission lines, thereby reducing particle flight time and improving beam matching efficiency.

[0111] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A low-energy beam transport line, characterized by, include: A single solenoid (5) having a channel (51) therein; A first moving component (9) is connected to the single solenoid (5) so that the single solenoid (5) is movable along the beam transmission direction; A vacuum accelerator tube (13) is provided. The first end of the vacuum accelerator tube (13) is connected to an ion source, and the second end of the vacuum accelerator tube (13) is connected to an accelerator after passing through the channel (51).

2. The low-energy beam transmission line according to claim 1, characterized in that, The single solenoid (5) moves a distance of (0, 400 mm) along the beam transmission direction.

3. The low-energy beam transmission line according to claim 1 or 2, characterized in that, The single solenoid (5) moves a distance of (0, 60 mm) along the beam transmission direction.

4. The low-energy beam transmission line according to claim 1 or 2, characterized in that, The first moving component (9) includes: The first guide rail (7) is located on the outside of the single solenoid and is arranged along the beam transmission direction. The first slider (12) has a first side that is slidably connected to the first guide rail (7), and the second side of the first slider (12) is connected to the single solenoid (5).

5. The low-energy beam transmission line according to claim 4, characterized in that, The first moving component (9) further includes: A first driving member is connected to the first slider (12) and is used to drive the first slider (12) to move along the first guide rail (7) in the beam transmission direction.

6. The low-energy beam transmission line according to claim 4, characterized in that, The low-energy beam transmission line is mounted on the bracket (6); the first guide rail (7) is mounted on the bracket (6).

7. The low-energy beam transmission line according to claim 4, characterized in that, The first slider (12) has a first groove on its first side that matches the first guide rail (7), and the first slider (12) is slidably connected to the first guide rail (7) through the first groove.

8. The low-energy beam transmission line according to claim 4, characterized in that, The first moving component (9) further includes a support member (91) disposed between the first slider (12) and the single solenoid (5).

9. The low-energy beam transmission line according to claim 8, characterized in that, The support member (91) includes: One or more support columns (911), the support end of the support column (911) is connected to the single solenoid (5), and the connecting end of the support column (911) is connected to the first slider (12).

10. The low-energy beam transmission line according to claim 9, characterized in that, The support member (91) also includes: A substrate (912) is provided, with its first surface connected to the connecting end of the support column and its second surface connected to the first slider (12).

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