Beam position detector for proton heavy ion synchrotron and method of use

Abstract

The present invention relates to a beam position detector for a proton heavy ion synchrotron accelerator and a method of using the detector, comprising: a plate assembly, a vacuum feedthrough assembly, an isolation ground assembly and a vacuum pipe; the plate assembly is fixedly arranged on the inner wall of the vacuum pipe through a support column assembly and separated by the isolation ground assembly; the vacuum feedthrough assembly is arranged on the outer wall of the vacuum pipe, and the vacuum feedthrough assembly is respectively connected to the plate assembly, an amplifier and a corresponding load; two vacuum pump ports are symmetrically provided on both sides of the vacuum pipe, and the two vacuum pump ports are connected to a vacuum pump through a vacuum pump pipe, so that the vacuum pipe maintains a preset vacuum degree; the plate assembly senses the beam to be measured entering from the upstream of the vacuum pipe, and the sensed signal is sent to a subsequent processing device for processing via the vacuum feedthrough assembly and the amplifier. The present invention can be widely used in the field of beam diagnosis of proton heavy ion beam accelerators.

Description

Technical Field

[0001] The invention relates to a beam position detector for a proton heavy ion synchrotron accelerator and a use method thereof, belonging to the field of beam diagnosis of proton heavy ion beam accelerators. Background Art

[0002] The beam diagnostic system is one of the important systems of the accelerator, and it is a necessary means to achieve stable operation of the machine and matching between various parts by measuring the beam parameters to monitor the transmission of the beam and determine the performance and parameters of the accelerator. Among them, the beam position detector is a necessary measurement element for the operation and debugging of the accelerator. Accurate circle-by-circle position and closed track measurement are of great significance to the optimization and research of the accelerator.

[0003] High-current annular ion accelerators require beam position detectors with low beam coupling impedance, few resonances, and high position sensitivity; low-current annular ion accelerators require beam position detectors with high detection sensitivity and extremely high vacuum requirements (≤5*10 -12 mbar); Medical ion synchrotron requires beam position detectors with compact structure, stable performance and low cost.

[0004] At present, the beam position detectors of most proton and heavy ion synchrotron rings adopt a rectangular beveled structure. This type of structure has disadvantages such as complex mechanics, many resonance points, and large beam coupling impedance. It is especially not suitable for high-current circular proton and heavy ion synchrotron ring accelerators. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to provide a beam position detector for proton and heavy ion accelerators, which has low beam coupling impedance, few resonances, high position sensitivity, compact structure, extremely high vacuum degree, stable performance and low cost, and a method of using the same. The detector can be widely used in the next generation of high-current circular ion accelerators, weak-current circular accelerators and medical ion synchrotron accelerators for life and health at the forefront of world science and technology.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A beam position detector for a proton and heavy ion synchrotron, comprising:

[0008] Plate assemblies, vacuum feedthrough assemblies, isolated ground assemblies, and vacuum ducts;

[0009] The electrode plate assembly is fixedly arranged on the inner wall of the vacuum pipe through the support column assembly and is separated by the isolation ground assembly;

[0010] The vacuum feedthrough assembly is arranged on the outer wall of the vacuum pipe, and the vacuum feedthrough assembly is respectively connected to the plate assembly, the amplifier and the corresponding load;

[0011] Two vacuum pump ports are symmetrically provided on both sides of the vacuum pipeline, and the two vacuum pump ports are connected to the vacuum pump through vacuum pump pipelines, so that the vacuum pipeline maintains a preset vacuum degree;

[0012] The electrode plate assembly senses the beam to be measured entering from the upstream of the vacuum pipeline, and the sensing signal is sent to the subsequent processing equipment through the vacuum feedthrough assembly and the amplifier for processing.

[0013] Furthermore, the electrode assembly includes arc-shaped first to fourth electrode plates symmetrically distributed on the inner wall of the vacuum pipe with the central axis of the vacuum pipe as the axis;

[0014] The isolation ground assembly comprises first to fourth isolation grounds spaced between two electrode plates, and the first to fourth isolation grounds are all connected to the inner wall of the vacuum pipe;

[0015] The support column assembly includes four groups of support columns, each of which includes a first support column arranged at the front end of the electrode plate and a second support column and a third support column arranged at the rear end of the electrode plate.

[0016] Furthermore, the distance between the first to fourth electrode plates and the inner wall of the vacuum pipe is 20-30 mm.

[0017] Furthermore, the thickness of the first to fourth electrode plates is 1-2 mm, the longitudinal length is 200-400 mm, and the electrode angle is 60°-75°.

[0018] Furthermore, the material of the support column assembly is an insulating polyethyleneimine medium.

[0019] Further, the vacuum feedthrough assembly includes a first beam upstream vacuum feedthrough to a fourth beam upstream vacuum feedthrough and a first beam downstream vacuum feedthrough to a fourth beam downstream vacuum feedthrough;

[0020] The first beam upstream vacuum feedthrough to the fourth beam upstream vacuum feedthrough are arranged at intervals upstream of the vacuum pipeline, and one end of the first beam upstream vacuum feedthrough to the fourth beam upstream vacuum feedthrough is respectively connected to the front end of the first electrode plate to the fourth electrode plate, and the other ends of the first beam upstream vacuum feedthrough to the fourth beam upstream vacuum feedthrough are respectively used to be connected to the amplifier;

[0021] The first beam downstream vacuum feedthrough to the fourth beam downstream vacuum feedthrough are arranged at intervals downstream of the vacuum pipeline, and one ends of the first beam downstream vacuum feedthrough to the fourth beam downstream vacuum feedthrough are respectively connected to the rear ends of the first electrode plate to the fourth electrode plate, and the other ends of the first beam downstream vacuum feedthrough to the fourth beam downstream vacuum feedthrough are used to be connected to a load.

[0022] Furthermore, the characteristic impedance of the first beam upstream vacuum feedthrough to the fourth beam upstream vacuum feedthrough and the first beam downstream vacuum feedthrough to the fourth beam downstream vacuum feedthrough is 50 ohms.

[0023] Furthermore, the detector also includes a metal wire mesh assembly, and the metal wire mesh assembly includes a first metal wire mesh and a second metal wire mesh that fully cover the two vacuum pump ports.

[0024] Furthermore, the first metal wire mesh and the second metal wire mesh are made of stainless steel, the metal wire mesh size is 10mm*10mm or 20mm*20mm, the metal wire width is 3-6mm, and the metal wire thickness is 2-4mm.

[0025] A method for using a beam position detector for a proton and heavy ion synchrotron, comprising the following steps:

[0026] 1) Determine the beam position measurement mode of the proton and heavy ion synchrotron. If it is the beam position measurement mode of the high-current circular accelerator, proceed to step 2); if it is the beam position measurement mode of the low-current circular accelerator, proceed to step 3); if it is the beam position measurement mode of the medical ion synchrotron, proceed to step 4);

[0027] 2) connecting the first beam upstream vacuum feedthrough to the fourth beam upstream vacuum feedthrough to the first amplifier to the fourth amplifier, respectively, and connecting the first beam downstream vacuum feedthrough to the fourth beam downstream vacuum feedthrough to the first 50 ohm load to the fourth 50 ohm load, respectively;

[0028] 3) Connecting the first beam upstream vacuum feedthrough to the fourth beam upstream vacuum feedthrough to the first to fourth amplifiers respectively, and connecting the first beam downstream vacuum feedthrough to the fourth beam downstream vacuum feedthrough to the first 10K-100K ohm load to the fourth 10K-100K ohm load respectively;

[0029] 4) Remove the first beam downstream vacuum feedthrough to the fourth beam downstream vacuum feedthrough, and connect the first beam upstream vacuum feedthrough to the fourth beam upstream vacuum feedthrough to the first amplifier to the fourth amplifier, respectively.

[0030] The present invention adopts the above technical solution, which has the following advantages:

[0031] 1. The plate assembly of the present invention is arranged on the inner wall of the vacuum pipe through the support column assembly, and is connected to the amplifier or the load through the vacuum feedthrough assembly arranged on the outer wall of the vacuum pipe, and has the characteristics of low beam coupling impedance, less resonance, high position sensitivity, compact structure, etc.

[0032] 2. The two sides of the vacuum pipeline of the present invention are connected to the vacuum pump through the vacuum pump port and the vacuum pump pipeline, and a metal wire mesh is arranged between the vacuum pump port and the vacuum pump pipeline, which can prevent the high pressure of the vacuum ion pump from affecting the beam position probe sensing signal and reduce the accelerator beam coupling impedance, while ensuring the vacuum degree in the vacuum pipeline, suitable for 300° high temperature baking, stable performance, low cost, etc.

[0033] 3. The vacuum feedthrough assembly of the present invention can be set according to actual measurement requirements, which can effectively solve the problem of high cost of medical ion acceleration area;

[0034] Therefore, the present invention can be widely applied in the field of heavy ion beam (including proton beam) accelerator beam diagnosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference numerals are used to represent the same components. In the accompanying drawings:

[0036] Figure 1 is a schematic diagram of the three-dimensional structure of a beam position detector provided by an embodiment of the present invention;

[0037] Figure 2 yes Figure 1 Schematic diagram of the longitudinal section structure;

[0038] Figure 3 yes Figure 1 Schematic diagram of the transverse cross-sectional structure;

[0039] The components in the figure are numbered as follows:

[0040] 1. Plate assembly; 11. First plate; 12. Second plate; 13. Third plate; 14. Fourth plate; 2. Vacuum feedthrough assembly; 21. First beam upstream vacuum feedthrough; 22. Second beam upstream vacuum feedthrough; 23. Third beam upstream vacuum feedthrough; 24. Fourth beam upstream vacuum feedthrough; 25. First beam downstream vacuum feedthrough; 26. Second beam downstream vacuum feedthrough; 27. Third beam downstream vacuum feedthrough; 28. Fourth beam downstream vacuum feedthrough; 3. Isolation ground assembly; 31. First isolation ground; 32. Second isolation ground; 33. Third isolation ground; 34. Fourth isolation ground; 4. Vacuum pipe; 5. Vacuum pump port; 6. Support column assembly; 61. First support column; 62. Second support column Support column; 63, third support column; 7, wire mesh assembly; 71, first wire mesh; 72, second wire mesh; 8, 50 ohm or 10K-100K ohm load; 81, first 50 ohm or 10K-100K ohm load; 82, second 50 ohm or 10K-100K ohm load; 83, third 50 ohm or 10K-100K ohm load; 84, fourth 50 ohm or 10K-100K ohm load; 9, 50 ohm high impedance low noise amplifier; 91, first 50 ohm high impedance low noise amplifier; 92, second 50 ohm high impedance low noise amplifier; 93, 50 ohm high impedance low noise amplifier; 94, 50 ohm high impedance low noise amplifier. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] In some embodiments of the present invention, a beam position detector for a proton heavy ion synchrotron is provided, which includes: a plate assembly, a vacuum feedthrough assembly, an isolation ground assembly and a vacuum pipe; the plate assembly is fixedly arranged on the inner wall of the vacuum pipe through a support column assembly and is grounded through an isolation ground assembly; the vacuum feedthrough assembly is arranged on the outer wall of the vacuum pipe, and the vacuum feedthrough assembly is respectively connected to the plate assembly and a corresponding load; a vacuum pump port is symmetrically provided on both sides of the vacuum pipe, and the two vacuum pump ports are respectively connected to the vacuum pump pipe; the plate assembly senses the beam to be measured entering from the upstream of the vacuum pipe, and the sensing signal is sent to the beam position detector for processing via the vacuum feedthrough assembly and the load. The present invention has the advantages of low beam coupling impedance, less resonance, high position sensitivity, compact structure, extremely high vacuum degree, suitable for 300° high temperature baking, stable performance, low cost, etc., and can be widely used in the field of beam diagnosis of heavy ion beam (including proton beam) accelerators.

[0044] Correspondingly, some other embodiments of the present invention also provide a method for using a beam position detector for a proton and heavy ion synchrotron.

[0045] Example 1

[0046] like Figure 1 As shown, this embodiment provides a beam position detector for a proton heavy ion synchrotron, which includes a plate assembly 1, a vacuum feedthrough assembly 2, an isolation ground assembly 3, a vacuum pipe 4, a vacuum pump port 5, a support column assembly 6, a load 8 and a low noise amplifier 9. Among them, the plate assembly 1 is fixedly arranged on the inner wall of the vacuum pipe 4 through the support column assembly 6 and separated by the isolation ground assembly 3; the vacuum feedthrough assembly 2 is arranged on the outer wall of the vacuum pipe 4, and the ultra-high vacuum feedthrough assembly 2 is respectively connected to the plate assembly 1, the load 8 or the low noise amplifier 9; a vacuum pump port 5 is symmetrically opened on both sides of the vacuum pipe 4, and the two vacuum pump ports 5 are connected to the vacuum pump through the vacuum pump pipe to ensure the vacuum degree in the vacuum pipe 4. The plate assembly 1 senses the beam to be measured entering from the upstream of the vacuum pipe 4, and the sensing signal is transmitted to the low noise amplifier 9 through the vacuum feedthrough assembly 2, and the low noise amplifier 9 transmits the sensing signal to the subsequent processing equipment to realize the detection of the beam position under different beam position modes.

[0047] In a preferred embodiment, Figure 2 , Figure 3As shown, the electrode plate assembly 1 includes arc-shaped first to fourth electrode plates 11 to 14 symmetrically distributed on the inner wall of the vacuum pipe 4 with the central axis of the vacuum pipe 4 as the axis; the isolation ground assembly 3 includes first to fourth isolation grounds 31 to 34 spaced between the arc-shaped electrode plates, and the first to fourth isolation grounds 31 to 34 are all connected to the inner wall of the vacuum pipe 4; the support column assembly 6 includes four groups of support columns, each group of support columns includes a third support column 63 arranged at the front end of each electrode plate and a first support column 61 and a second support column 62 arranged at the rear end of each electrode plate, so that the support and fixation of each electrode plate is more stable.

[0048] In a preferred embodiment, the distance between the first electrode plate 11 to the fourth electrode plate 14 and the vacuum pipe 4 is 20-30 mm.

[0049] In a preferred embodiment, the thickness of the first electrode plate 11 to the fourth electrode plate 14 is 1-2 mm, the longitudinal length is 200-400 mm, and the electrode angle is 60°-75°.

[0050] In a preferred embodiment, the material of the support column assembly 6 is an insulating polyethyleneimine (Vespel) medium.

[0051] In a preferred embodiment, the vacuum feedthrough assembly 2 includes first beam upstream vacuum feedthrough 21 to fourth beam upstream vacuum feedthrough 24 and first beam downstream vacuum feedthrough 25 to fourth beam downstream vacuum feedthrough 28 . Among them, the first beam upstream vacuum feedthrough 21 to the fourth beam upstream vacuum feedthrough 24 are arranged at intervals upstream of the vacuum pipe 4, and one ends of the first beam upstream vacuum feedthrough 21 to the fourth beam upstream vacuum feedthrough 24 are respectively connected to the front ends of the first electrode plate 11 to the fourth electrode plate 14, and the other ends of the first beam upstream vacuum feedthrough 21 to the fourth beam upstream vacuum feedthrough 24 are respectively used to be connected to the first 50 ohm high-impedance low-noise amplifier 91 to the fourth 50 ohm high-impedance low-noise amplifier 94; the first beam downstream vacuum feedthrough 25 to the fourth beam downstream vacuum feedthrough 28 are arranged at intervals downstream of the vacuum pipe 4, and one ends of the first beam downstream vacuum feedthrough 25 to the fourth beam downstream ultra-high vacuum feedthrough 28 are respectively connected to the rear ends of the first electrode plate 11 to the fourth electrode plate 14, and the other ends of the first beam downstream vacuum feedthrough 25 to the fourth beam downstream vacuum feedthrough 28 are respectively used to be connected to 50 ohm or 10K-100K ohm loads 81 to 84.

[0052] In a preferred embodiment, the characteristic impedances of the first beam upstream vacuum feedthrough 21 to the fourth beam upstream vacuum feedthrough 24 and the first beam downstream vacuum feedthrough 25 to the fourth beam downstream vacuum feedthrough 28 are all 50 ohms.

[0053] In a preferred embodiment, the first beam upstream vacuum feedthrough 21 to the fourth beam upstream vacuum feedthrough 24 and the first beam downstream vacuum feedthrough 25 to the fourth beam downstream vacuum feedthrough 28 all adopt a vacuum degree higher than 1×10 -11 mbar ultra-high altitude feedthrough.

[0054] In a preferred embodiment, the detector further includes a metal wire mesh assembly 7 , and the metal wire mesh assembly 7 includes a first metal wire mesh 71 and a second metal wire mesh 72 that fully cover the two vacuum pump ports 5 .

[0055] In a preferred embodiment, the first metal mesh 71 and the second metal mesh 72 are made of stainless steel, the metal mesh hole size is 10mm*10mm or 20mm*20mm, the metal wire width is 3-6mm, and the metal wire thickness is 2-4mm. The purpose of adding the metal mesh is to prevent the high voltage of the vacuum ion pump from affecting the beam position probe sensing signal and to reduce the accelerator beam coupling impedance.

[0056] Example 2

[0057] Based on the beam position detector for a proton heavy ion synchrotron provided in Example 1, this embodiment provides a method for using the beam position detector for a proton heavy ion synchrotron, including the following contents:

[0058] 1) Determine the beam position measurement mode of the proton and heavy ion synchrotron. If it is the beam position measurement mode of the high-current circular accelerator, proceed to step 2). If it is the beam position measurement mode of the low-current circular accelerator, proceed to step 3). If it is the beam position measurement mode of the medical ion synchrotron, proceed to step 4).

[0059] The high-current circular accelerator in the embodiment of the present invention refers to a high-current circular accelerator with a particle number of more than 1×10 9 Even as high as 1×10 13 A weak-flow circular accelerator is one with a particle count of less than 1×10 9 The medical ion synchrotron is also a type of weak-current circular accelerator, with a particle number of 1×10 9 The beam position detector of the medical ion synchrotron has the characteristics of compact structure, stable performance and low cost.

[0060] 2) Connect the first beam upstream vacuum feedthrough 21 to the fourth beam upstream vacuum feedthrough 24 to the first 50 ohm high impedance low noise amplifier 91 to the fourth 50 ohm high impedance low noise amplifier 94 respectively, and connect the first beam downstream vacuum feedthrough 25 to the fourth beam downstream vacuum feedthrough 28 to the first 50 ohm load 81 to the fourth 50 ohm load 84 respectively.

[0061] In the beam position measurement mode of the high-current circular accelerator, the beam to be measured and the plate assembly 1 are electromagnetically coupled, and the signal sensed by the plate assembly 1 of the beam position detector is finally amplified by a 50-ohm high-resistance low-noise amplifier 9 and output to the beam position detector for electronic processing.

[0062] 3) The first beam upstream vacuum feedthrough 21 to the fourth beam upstream vacuum feedthrough 24 are respectively connected to the first 50 ohm high impedance low noise amplifier 91 to the fourth 50 ohm high impedance low noise amplifier 94, and the first beam downstream vacuum feedthrough 25 to the fourth beam downstream vacuum feedthrough 28 are respectively connected to the first 10K-100K ohm load to the fourth 10K-100K ohm load.

[0063] In the beam position measurement mode of the weak current circular accelerator, the measured beam and the plate assembly 1 are capacitively coupled, and the signal induced by the plate assembly 1 of the beam position detector is finally amplified by the high-resistance low-noise amplifier 9 and output to the beam position detector electronics for processing. The purpose of the 10K-100K ohm load is to absorb the beam induced static charge.

[0064] 4) directly remove the first beam downstream vacuum feedthrough 25 to the fourth beam downstream vacuum feedthrough 28, so that only the beam upstream feedthrough is retained on each electrode plate, and the first beam upstream vacuum feedthrough 21 to the fourth beam upstream vacuum feedthrough 24 are respectively connected to the first 50 ohm high-impedance low-noise amplifier 91 to the fourth 50 ohm high-impedance low-noise amplifier 94.

[0065] The above embodiments are only used to illustrate the present invention, wherein the structure, connection mode and manufacturing process of each component may be changed. Any equivalent transformations and improvements based on the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A beam position detector for a proton and heavy ion synchrotron, characterized in that: include: Plate assemblies, vacuum feedthrough assemblies, isolated ground assemblies, and vacuum ducts; The electrode plate assembly is fixedly arranged on the inner wall of the vacuum pipe through the support column assembly and is separated by the isolation ground assembly; The vacuum feedthrough assembly is arranged on the outer wall of the vacuum pipe, and the vacuum feedthrough assembly is respectively connected to the plate assembly, the amplifier and the corresponding load; Two vacuum pump ports are symmetrically opened on both sides of the vacuum pipeline, and the two vacuum pump ports are connected to the vacuum pump through the vacuum pump pipeline, so that the vacuum pipeline maintains a preset vacuum degree; The electrode plate assembly senses the beam to be measured entering from the upstream of the vacuum pipeline, and the sensing signal is sent to a subsequent processing device for processing via the vacuum feedthrough assembly and the amplifier; The electrode assembly includes arc-shaped first to fourth electrode plates symmetrically distributed on the inner wall of the vacuum pipe with the central axis of the vacuum pipe as the axis; The isolation ground assembly comprises first to fourth isolation grounds spaced between two electrode plates, and the first to fourth isolation grounds are all connected to the inner wall of the vacuum pipe; The support column assembly includes four groups of support columns, each of which includes a first support column arranged at the front end of the plate and a second support column and a third support column arranged at the rear end of the plate; The vacuum feedthrough assembly includes a first beam upstream vacuum feedthrough to a fourth beam upstream vacuum feedthrough and a first beam downstream vacuum feedthrough to a fourth beam downstream vacuum feedthrough; The first beam upstream vacuum feedthrough to the fourth beam upstream vacuum feedthrough are arranged at intervals upstream of the vacuum pipeline, and one end of the first beam upstream vacuum feedthrough to the fourth beam upstream vacuum feedthrough is respectively connected to the front end of the first electrode plate to the fourth electrode plate, and the other ends of the first beam upstream vacuum feedthrough to the fourth beam upstream vacuum feedthrough are respectively used to be connected to the amplifier; The first beam downstream vacuum feedthrough to the fourth beam downstream vacuum feedthrough are arranged at intervals downstream of the vacuum pipeline, and one ends of the first beam downstream vacuum feedthrough to the fourth beam downstream vacuum feedthrough are respectively connected to the rear ends of the first electrode plate to the fourth electrode plate, and the other ends of the first beam downstream vacuum feedthrough to the fourth beam downstream vacuum feedthrough are used to be connected to a load.

2. A beam position detector for a proton and heavy ion synchrotron according to claim 1, characterized in that: The distance between the first to fourth electrode plates and the inner wall of the vacuum pipe is 20-30 mm.

3. A beam position detector for a proton and heavy ion synchrotron according to claim 1, characterized in that: The thickness of the first to fourth pole plates is 1-2 mm, the longitudinal length is 200-400 mm, and the pole plate angle is 60°-75°.

4. A beam position detector for a proton and heavy ion synchrotron according to claim 1, characterized in that: The material of the support column assembly is insulating polyethyleneimine medium.

5. The beam position detector for a proton and heavy ion synchrotron according to claim 1, characterized in that: The characteristic impedance of the first beam upstream vacuum feedthrough to the fourth beam upstream vacuum feedthrough and the first beam downstream vacuum feedthrough to the fourth beam downstream vacuum feedthrough is 50 ohms.

6. A beam position detector for a proton and heavy ion synchrotron according to claim 1, characterized in that: The detector further comprises a metal wire mesh assembly, wherein the metal wire mesh assembly comprises a first metal wire mesh and a second metal wire mesh which fully cover the two vacuum pump ports.

7. A beam position detector for a proton and heavy ion synchrotron according to claim 6, characterized in that: The first metal wire mesh and the second metal wire mesh are made of stainless steel, the metal wire mesh size is 10mm*10mm or 20mm*20mm, the metal wire width is 3-6mm, and the metal wire thickness is 2-4mm.

8. A method for using the beam position detector for a proton and heavy ion synchrotron according to any one of claims 1 to 7, characterized in that The following steps are involved: 1) Determine the beam position measurement mode of the proton and heavy ion synchrotron. If it is the beam position measurement mode of the high-current circular accelerator, proceed to step 2); if it is the beam position measurement mode of the low-current circular accelerator, proceed to step 3); if it is the beam position measurement mode of the medical ion synchrotron, proceed to step 4); 2) connecting the first beam upstream vacuum feedthrough to the fourth beam upstream vacuum feedthrough to the first amplifier to the fourth amplifier, respectively, and connecting the first beam downstream vacuum feedthrough to the fourth beam downstream vacuum feedthrough to the first 50 ohm load to the fourth 50 ohm load, respectively; 3) Connecting the first beam upstream vacuum feedthrough to the fourth beam upstream vacuum feedthrough to the first to fourth amplifiers respectively, and connecting the first beam downstream vacuum feedthrough to the fourth beam downstream vacuum feedthrough to the first 10K-100K ohm load to the fourth 10K-100K ohm load respectively; 4) Remove the first beam downstream vacuum feedthrough to the fourth beam downstream vacuum feedthrough, and connect the first beam upstream vacuum feedthrough to the fourth beam upstream vacuum feedthrough to the first amplifier to the fourth amplifier, respectively.

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