Cyclotron and superconducting magnet debugging method

Abstract

The invention discloses a cyclotron and a superconducting magnet debugging method, and the cyclotron comprises a superconducting magnet and a first debugging segment assembly. The first debugging section assembly comprises a first connecting unit and a first connecting end, and the first connecting unit is used for being in threaded connection with a load belt of the cryostat and used for tensioning or loosening the load belt; the first connecting end is used for being detachably connected with a second debugging section assembly, and the first connecting end is used for receiving power to drive the first connecting unit to move. The cyclotron and the superconducting magnet debugging method are used for realizing flexible installation of a superconducting magnet debugging tool, and ensuring normal use of the cyclotron and proton radiotherapy effect.

Description

[0001] This application is a divisional application of the Chinese invention patent application with application number 202410536342.9, application date April 30, 2024, and invention name "Cyclotron, superconducting magnet debugging tool and superconducting magnet debugging method". This divisional application was submitted to the State Intellectual Property Office on December 19, 2024. Technical Field

[0002] The invention relates to the technical field of proton therapy systems, and in particular to a cyclotron accelerator and a superconducting magnet debugging method. Background Art

[0003] A proton therapy system is a system that provides proton beams for radiotherapy and can be used to treat diseases such as tumors. One of the main components of a proton mass system is a cyclotron, which is used to accelerate particles to the energy required for treatment and then emit a particle beam. After the particle beam enters the human body, it releases energy in tumors and other lesions to remove tumors and other lesions. Cyclotrons usually use superconducting magnets (superconducting magnets) to generate magnetic fields, which rotate and focus particles. The central positioning of the superconducting coils in the cyclotron will affect the direction of particle movement, and thus affect the beam quality of the particle beam and the therapeutic effect of the patient's tumor.

[0004] In the existing cyclotron, in order to achieve the center positioning of the superconducting coil, the cryostat will be provided with several support belts, which can be connected to the debugging tool, so as to adjust the tension applied to the support belt by the debugging tool, so as to adjust the superconducting coil installed in the cryostat, so as to ensure that the superconducting coil is in the expected position. The existing debugging tool will take up a large space after installation, resulting in interference when the cryostat needs to be connected with other components during operation. At this time, the debugging tool needs to be removed. However, the superconducting coil may be found to be offset during operation, and the position of the superconducting coil cannot be adjusted because the debugging tool is removed. If the position of the superconducting coil needs to be adjusted, it is necessary to remove the components that interfere with the debugging tool and install the debugging tool. After the debugging of the debugging tool is completed, the debugging tool needs to be removed and the components that interfere with the debugging tool need to be installed. The process is relatively cumbersome and will affect the operation of the proton therapy system and the treatment effect. Summary of the invention

[0005] The object of the present invention is to provide a cyclotron accelerator and a superconducting magnet debugging method, which is used to realize flexible installation of a superconducting magnet debugging tool and reduce the risk of the superconducting magnet debugging tool interfering with other parts and failing to install.

[0006] The purpose of the present invention is achieved by the following technical solutions:

[0007] A cyclotron, comprising:

[0008] A superconducting magnet comprises a cryostat and a superconducting coil, wherein the cryostat comprises at least one load belt and the cryostat is provided with an installation space; the superconducting coil is installed in the installation space of the cryostat;

[0009] A superconducting magnet debugging tool includes a first debugging section assembly, wherein the first debugging section assembly includes a first connecting unit and a first connecting end, wherein the first connecting end is used for detachably connecting with a second debugging section assembly, and the first connecting end is used for receiving power to drive the first connecting unit to move, and the first connecting unit is threadedly connected to the load belt of the cryostat and is used for tightening or loosening the load belt.

[0010] Preferably, the first connection unit includes a first threaded portion, the load belt includes a second threaded portion, and the first threaded portion is threadedly connected to the second threaded portion;

[0011] Wherein, the first threaded portion is a nut and the second threaded portion is a stud, or the first threaded portion is a stud and the second threaded portion is a nut.

[0012] Preferably, the first connecting unit also includes a connecting sleeve, in which a connecting groove is provided; the first threaded portion is a nut, and the first threaded portion is arranged in the connecting groove; wherein the inner contour of the connecting groove is adapted to the outer contour of the first threaded portion, and the depth of the connecting groove is greater than the thickness of the first threaded portion.

[0013] Preferably, the first debugging section assembly comprises a first connecting rod, one end of the first connecting rod is connected to the first connecting unit, and the other end of the first connecting rod forms the first connecting end;

[0014] Wherein, the first connecting end is provided with a key slot, or the first connecting end is provided with a key.

[0015] Preferably, a plurality of load belts are provided, and the plurality of load belts are all connected to the superconducting magnet debugging tool;

[0016] Alternatively, the cyclotron further comprises an adaptive adjustment tool, a part of the load belts are connected to the superconducting magnet debugging tool, and a part of the load belts are connected to the adaptive adjustment tool.

[0017] Preferably, the adaptive adjustment tool comprises an adjustment component and a connecting pipe; the connecting pipe is provided with a threaded connection hole threadedly connected to the second threaded portion; the adjustment component is connected to the connecting pipe and is used to drive the connecting pipe to rotate.

[0018] Preferably, the adaptive adjustment tool further comprises a potentiometer, and the potentiometer is used to monitor the movement stroke of the adjustment component;

[0019] And / or, the adaptive adjustment tools are provided in plurality, and the plurality of adaptive adjustment tools are distributed at opposite ends of the cryostat along the X-axis direction; wherein the X-axis direction is the beam-out direction when the cyclotron is installed on the rack.

[0020] Preferably, a Hall sensor is further included, wherein the Hall sensor is installed at the middle position of the cryostat and is used to detect the magnetic field at the middle position of the cryostat.

[0021] Preferably, the superconducting magnet debugging tool also includes a second debugging section assembly, the second debugging section assembly includes a second connecting end and an adjusting unit, the second connecting end is detachably connected to the first connecting end, at least a portion of the adjusting unit is exposed to the outside, and the adjusting unit is used to drive the second connecting end to move, so as to drive the first debugging section assembly to move and tighten or relax the load belt.

[0022] Preferably, the second debugging section assembly comprises a second connecting rod, one end of the second connecting rod forms the second connecting end, and the other end of the second connecting rod is connected to the adjusting unit;

[0023] Wherein, when the first connection end is provided with a key slot, the second connection end is provided with a key; when the first connection end is provided with a key, the second connection end is provided with a key slot; the first connection end is key-connected to the second connection end.

[0024] Preferably, the adjustment unit includes an adjustment handle, a dial and a pointer; the adjustment handle is connected to the first connecting end to drive the second connecting rod to rotate; the dial is connected to the second connecting rod so that the second connecting rod can drive the dial to rotate relative to the pointer, or the pointer is connected to the second connecting rod so that the second connecting rod can drive the pointer to rotate relative to the dial.

[0025] Preferably, it further comprises a reaction plate and a shell, at least a part of the second connecting rod is installed in the shell, the reaction plate is sleeved in the shell, and the reaction plate is used to be fixedly connected to the plunger of the cyclotron.

[0026] A superconducting magnet debugging method, which is applied to any one of the above-mentioned cyclotron accelerators, the superconducting magnet debugging method comprising:

[0027] Connect the superconducting magnet commissioning tool to the load strap of the cryostat and make preliminary adjustments to the position of the superconducting coils;

[0028] Removing part of the superconducting magnet debugging tool and part of the second debugging section assembly of the superconducting magnet debugging tool, installing the adaptive adjustment tool, and reinstalling the removed second debugging section assembly;

[0029] The cyclotron equipped with a superconducting magnet is in operation, and the adaptive adjustment tool applies tension to the load belt to overcome the beam deviation along the X-axis direction caused by gravity on the superconducting coil.

[0030] Preferably, the adaptive adjustment tool applies tension to the load belt to overcome the beam deviation along the X-axis direction caused by gravity of the superconducting coil, specifically comprising:

[0031] A Hall sensor is used to detect the center position of the cryostat and feed back a voltage value, and a magnetic field tester is used to detect the actual magnetic field of the superconducting magnet and feed back a voltage value. When the difference between the voltage value fed back by the Hall sensor and the voltage value detected by the magnetic field tester exceeds a predetermined threshold, the adaptive adjustment tool is used to adjust the position of the superconducting coil, and the difference between the voltage value fed back by the Hall sensor and the voltage value detected by the magnetic field tester is made smaller than the predetermined threshold.

[0032] Preferably, it also includes:

[0033] A test instrument is installed at the isocenter of the treatment room, and the test instrument receives the beam emitted by the cyclotron. The test instrument compares the position where the beam is received with the predetermined center point of the test instrument to obtain the offset of the beam in the X-axis and Y-axis directions. If the offset of the beam in the X-axis and / or Y-axis directions exceeds the offset threshold, the offset of the superconducting coil in the Y-axis direction is adjusted by a superconducting magnet debugging tool, and / or an adaptive adjustment tool is used to adjust the offset of the superconducting coil in the X-axis direction, wherein the X-axis direction intersects with the Y-axis direction.

[0034] Preferably, the step of connecting the superconducting magnet debugging tool to the load belt of the cryostat and preliminarily adjusting the position of the superconducting coil specifically includes:

[0035] The superconducting magnet debugging tool comprises a pointer and a dial. The superconducting magnet debugging tool is connected to the load belt. When further movement of the superconducting magnet debugging tool is subject to resistance provided by the load belt, the scale indicated by the pointer is recorded as an initial reading to indicate the adjustment amount of the superconducting magnet debugging tool.

[0036] Compared with the prior art, the beneficial effects of the present invention include at least:

[0037] By adopting a first debugging section assembly having a first connecting end, and the second debugging section assembly being detachably connected to the first connecting end of the first debugging section assembly, the second debugging section assembly can be connected to the first debugging section assembly to apply a driving force to the first debugging section assembly to thereby tighten or loosen the load belt, and can be separated from the first debugging section assembly when necessary, thereby reducing the risk of interference between the superconducting magnet debugging tool and other components during installation; and the detachable first debugging section assembly and second debugging section assembly make the installation of the superconducting magnet debugging tool more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic structural diagram of a cyclotron accelerator according to an embodiment of the present invention;

[0039] Figure 2 is a cross-sectional view of a cyclotron according to an embodiment of the present invention;

[0040] Figure 3 is a partial cross-sectional view of a cyclotron according to an embodiment of the present invention;

[0041] Figure 4 is a structural schematic diagram of a superconducting magnet debugging tool according to an embodiment of the present invention;

[0042] Figure 5 It is another partial cross-sectional view of the cyclotron according to the embodiment of the present invention.

[0043] In the figure: 1. superconducting magnet debugging tool; 11. first debugging section assembly; 111. first connecting unit; 1111. first threaded portion; 1112. connecting sleeve; 1113. connecting groove; 1114. first connecting groove; 112. first connecting end; 113. first connecting rod; 12. second debugging section assembly; 121. second connecting end; 122. adjusting unit; 1221. adjusting handle; 1222. dial; 1223. pointer; 1224. connecting column ; 1225, adjustment sleeve; 123, second connecting rod; 1231, second connecting groove; 1232, clamp; 124, reaction plate; 125, shell; 2, low-temperature thermostat; 21, load belt; 211, second threaded portion; 22, installation space; 3, adaptive adjustment tool; 31, adjustment assembly; 311, ball screw; 32, connecting pipe; 321, threaded connection hole; 33, potentiometer; 4, Hall sensor; 5, plunger; 51, mounting hole; 6, iron yoke. DETAILED DESCRIPTION

[0044] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of 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 concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0045] The words expressing position and direction described in the present invention are all explained by taking the accompanying drawings as examples, but they can be changed as needed, and all changes are included in the protection scope of the present invention.

[0046] like Figure 3 and Figure 4 As shown, the present invention provides a superconducting magnet debugging tool 1, which includes a cryostat 2 and a superconducting coil. The superconducting magnet debugging tool 1 is used to connect with the load belt 21 of the cryostat 2, and can apply an adjustable tension to the load belt 21, thereby adjusting the position of the superconducting magnet, specifically, adjusting the position of the superconducting coil installed in the cryostat 2 in the superconducting magnet. The superconducting magnet debugging tool 1 includes a first debugging section assembly 11 and a second debugging section assembly 12, and can also include a shell 125 and a reaction plate 124.

[0047] The first debugging section assembly 11 is used to connect with the load belt 21 of the cryostat 2. The first debugging section assembly 11 includes a first connecting unit 111 and a first connecting rod 113. One end of the first connecting rod 113 is connected to the first connecting unit 111, and the other end forms a first connecting end 112 connected to the second debugging section assembly 12. The first connecting end 112 can receive power transmitted from the second debugging section assembly 12, and drive the first connecting unit 111 connected to the first connecting rod 113 to move.

[0048] The first connection unit 111 is connected to the load belt 21 of the cryostat 2, and can realize the tension or relaxation of the load belt 21 through its own movement. Specifically, the first connection unit 111 includes a first threaded portion 1111, and the load belt 21 includes a second threaded portion 211. The first threaded portion 1111 and the second threaded portion 211 are threadedly connected, and when the first threaded portion 1111 in the first connection unit 111 rotates, the matching depth of the second threaded portion 211 and the first threaded portion 1111 will change. Among them, the position of the first connection unit 111 can remain relatively fixed, that is, the first connection unit 111 only rotates without moving. At this time, the change in the matching depth of the second threaded portion 211 and the first threaded portion 1111 will drive the load belt 21 to move, thereby realizing the adjustment of the position of the superconducting coil in the superconducting magnet.

[0049] In some specific embodiments, the first threaded portion 1111 is specifically a nut, and the second threaded portion 211 is specifically a stud. The first connection unit 111 also includes a connection sleeve 1112. The connection sleeve 1112 is sleeved on the first threaded portion 1111 and connected to the first connecting rod 113. Specifically, the connection sleeve 1112 is provided with a connection groove 1113 with an opening toward the first threaded portion 1111, and the inner contour of the connection groove 1113 is adapted to the outer contour of the first threaded portion 1111, that is, the shape and size of the inner contour of the connection groove 1113 are the same or similar to the shape and size of the outer contour of the first threaded portion 1111. Among them, the outer peripheral contour of the first threaded portion 1111 is a non-circular contour, so when the connection sleeve 1112 is sleeved on the first threaded portion 1111, the connection sleeve 1112 can drive the first threaded portion 1111 to rotate synchronously, thereby changing the matching depth of the first threaded portion 1111 and the second threaded portion 211.

[0050] The end of the connecting sleeve 1112 facing the first connecting rod 113 may be provided with a first connecting groove 1114, and the first connecting groove 1114 is adapted to the first connecting rod 113, that is, the shape and size of the inner contour of the first connecting groove 1114 are the same or similar to the shape and size of the outer contour of the first connecting rod 113 used to insert into the first connecting groove 1114. Among them, at least a part of the outer side surface of the first connecting rod 113 used to insert into the first connecting groove 1114 is a plane, so that when the first connecting rod 113 rotates, it can drive the connecting sleeve 1112 to rotate together. Specifically, the part of the first connecting rod 113 used to insert into the first connecting groove 1114 can be a rectangular column structure, and the first connecting groove 1114 can be a rectangular groove. In addition, in order to keep the connecting sleeve 1112 and the first connecting rod 113 stably connected during the disassembly and assembly process of the superconducting magnet debugging tool 1, the first connecting rod 113 can form an interference fit with the first connecting groove 1114 of the connecting sleeve 1112.

[0051] When the first threaded portion 1111 is matched with the second threaded portion 211, the end of the second threaded portion 211 may exceed the end surface of the first threaded portion 1111 and extend into the connecting groove 1113. To prevent the portion of the second threaded portion 211 that exceeds the first threaded portion 1111 from interfering with the connecting sleeve 1112, the depth of the connecting sleeve 1112 is greater than the thickness of the first threaded portion 1111, so that after the connecting sleeve 1112 is sleeved on the first threaded portion 1111, a certain space can still be reserved in the depth direction of the connecting sleeve 1112, and the space can be used to accommodate the portion of the second threaded portion 211 that exceeds the first threaded portion 1111, so as to prevent the second threaded portion 211 from interfering with the first sleeve. The depth direction of the connecting sleeve 1112 and the thickness direction of the first threaded portion 1111 can be parallel to the moving direction of the second threaded portion 211.

[0052] In some other specific embodiments, the first threaded portion 1111 may also be a stud, and the second threaded portion 211 may also be a nut. The first connecting rod 113 may be inserted into the first threaded portion 1111 and connected to the first connecting rod 113 by interference fit. As a preferred embodiment, the first threaded portion 1111 is specifically a nut, and the second threaded portion 211 is specifically a stud.

[0053] At least a portion of the second debugging section assembly 12 is exposed to the outside world for receiving external power, thereby driving the first debugging section assembly 11 to move. The second debugging section assembly 12 includes an adjustment unit 122 and a second connecting rod 123. One end of the second connecting rod 123 forms a second connecting end 121, and is used to be detachably connected to the first connecting end 112 of the first connecting rod 113, and the other end of the second connecting rod 123 is connected to the adjustment unit 122. The second connecting rod 123 can be key-connected to the first connecting rod 113. Specifically, the second connecting end 121 of the second connecting rod 123 is formed with one or more keys. When the keys are set to multiple, the multiple keys can be evenly spaced along the circumference of the second connecting rod 123; the first connecting end 112 of the first connecting rod 113 is formed with a key slot that cooperates with the second connecting end 121. When the first connecting rod 113 cooperates with the second connecting rod 123, due to the cooperation of the key and the key slot, the first connecting rod 113 and the second connecting rod 123 will not produce relative rotation but will produce relative movement along the axial direction of the first connecting rod 113. Therefore, the first connecting rod 113 can drive the second connecting rod 123 to rotate synchronously, and when the first debugging section assembly 11 and the second debugging section assembly 12 need to be separated, the second connecting rod 123 of the second debugging section assembly 12 can be pulled out of the key slot to achieve the separation of the first debugging section assembly 11 and the second debugging section assembly 12. It should be noted that in other embodiments, a keyway may be formed at the second connecting end 121 of the second connecting rod 123 , and a key may be formed at the first connecting end 112 of the first connecting rod 113 , so as to achieve a key connection between the second connecting rod 123 and the first connecting rod 113 .

[0054] The adjustment unit 122 includes at least a portion exposed to the outside, specifically, the adjustment end of the adjustment unit 122 is exposed to the outside, so that the user can apply force to the adjustment unit 122, thereby driving the first debugging section assembly 11 to move. The adjustment unit 122 may include an adjustment handle 1221, a connecting column 1224, and an adjustment sleeve 1225. The connecting column 1224 is connected to the second connecting rod 123 and can drive the second connecting rod 123 to rotate. Specifically, the second connecting rod 123 is provided with a second connecting groove 1231 adapted to the connecting column 1224, that is, the shape and size of the contour of the second connecting groove 1231 are the same or similar to the shape and size of the outer contour of the connecting column 1224. The connecting column 1224 is inserted into the second connecting groove 1231 of the second connecting rod 123, and at least one outer side surface of the connecting column 1224 is a plane, so that the connecting column 1224 can drive the second connecting rod 123 to rotate; for example, the connecting column 1224 is a rectangular column, and the second connecting groove 1231 is a rectangular groove.

[0055] The adjustment sleeve 1225 is sleeved on the connecting column 1224 and can drive the connecting column 1224 to rotate. In order to improve the stability of the connection between the adjustment sleeve 1225 and the connecting column 1224, the adjustment sleeve 1225 is provided with a threaded hole, and a threaded column is installed in the threaded hole. The threaded column can pass through the adjustment sleeve 1225 and abut against the connecting column 1224 to press the connecting column 1224, thereby improving the stability of the connection between the adjustment sleeve 1225 and the connecting column 1224. Among them, the adjustment end of the adjustment sleeve 1225 is exposed to the outside.

[0056] The adjustment handle 1221 can be sleeved on the adjustment end of the adjustment sleeve 1225, so as to be connected to the first connection end 112 through the adjustment sleeve 1225 and the connection column 1224, so that the adjustment handle 1221 can drive the second connection rod 123 to rotate, and the second connection end 121 of the second connection rod 123 drives the first debugging section assembly 11 to rotate, so as to tighten or loosen the load belt 21. The adjustment end of the adjustment sleeve 1225 can be a hexagonal column, and the adjustment handle 1221 can be provided with a hexagonal hole matched with the hexagonal column.

[0057] In order to facilitate observation of the adjustment angle of the first debugging section assembly 11, the adjustment unit 122 may further include a dial 1222 and a pointer 1223. The dial 1222 is provided with a plurality of evenly distributed scales. The dial 1222 may be connected to the second connecting rod 123 so that the second connecting rod 123 can drive the dial 1222 to rotate. For example, the second connecting rod 123 is connected to a clamp 1232, the clamp 1232 is clamped and fixed to the second connecting rod 123, and the dial 1222 is mounted on the clamp 1232 by fasteners such as screws; the pointer 1223 may remain fixed relative to the second connecting rod 123, for example, the pointer 1223 is mounted on the housing 125 or the reaction plate 124, preferably, it is arranged on the housing 125. Therefore, when the second connecting rod 123 can drive the dial 1222 installed on the clamp 1232 to rotate relative to the pointer 1223, the adjustment angle of the first debugging section assembly 11 of the handle can be determined by the change in the scale value of the rotating dial 1222. Alternatively, the pointer 1223 can be connected to the second connecting rod 123 so that the second connecting rod 123 can drive the pointer 1223 to rotate, for example, the second connecting rod 123 is connected to the clamp 1232, the clamp 1232 is clamped and fixed to the second connecting rod 123, and the pointer 1223 is installed on the clamp 1232 by fasteners such as screws; the dial 1222 can remain fixed relative to the second connecting rod 123, for example, the dial 1222 is installed on the housing 125 or the reaction plate 124, preferably installed on the housing 125. Therefore, when the second connecting rod 123 can drive the pointer 1223 to rotate relative to the dial 1222, the adjustment angle of the first debugging section assembly 11 of the handle can be determined by the change in the scale value of the rotation of the dial 1222.

[0058] The interior of the housing 125 is hollow, and the housing 125 can be sleeved on the first debugging section assembly 11 and at least part of the second debugging section assembly. The reaction plate 124 is sleeved on the housing 125, and the reaction plate 124 can be fixedly connected to the plunger 5 used to install the superconducting magnet debugging tool 1 in the cyclotron, for example, the reaction plate 124 is fixedly installed on the plunger 5 by fasteners such as screws.

[0059] Reference Figure 1 and Figure 2 The present invention also provides a cyclotron, including a superconducting magnet and the superconducting magnet debugging tool 1, and may also include a Hall sensor 4, an adaptive adjustment tool 3, an iron yoke 6 and a plunger 5. The superconducting magnet includes a cryostat 2 and a superconducting coil located in the cryostat.

[0060] The iron yoke 6 and the plunger 5 are arranged on the outer periphery of the cryostat 2. The plunger 5 is used to install the superconducting magnet debugging tool 1 and the adaptive adjustment tool 3. Specifically, the plunger 5 can be provided with a mounting hole 51, and the mounting hole 51 can extend to the load belt 21 of the cryostat 2. The superconducting magnet debugging tool 1 and the adaptive adjustment tool 3 can be installed in the mounting hole 51, so that the superconducting magnet debugging tool 1 and the adaptive adjustment tool 3 can be connected to the load belt 21 of the cryostat 2.

[0061] The cryostat 2 includes at least one load belt 21, and the cryostat 2 is provided with an installation space 22. The coil of the superconducting magnet (superconducting coil) can be installed in the installation space 22 of the cryostat 2, and the cryostat 2 is used to maintain the temperature in the installation space 22 to meet the working requirements of the superconducting magnet. One end of the load belt 21 can be directly or indirectly connected to the superconducting coil, so that when the load belt 21 is tightened or loosened, the superconducting coil can be driven to move, thereby adjusting the position of the superconducting coil; the other end of the load belt 21 can be connected to the superconducting magnet debugging tool 1 or the adaptive adjustment tool 3, so that the superconducting magnet debugging tool 1 or the adaptive adjustment tool 3 can tighten or loosen the load belt 21.

[0062] The load belt 21 may be provided in plurality, and the load belt 21 is preferably provided in an even number, and the even number of load belts 21 are symmetrically distributed along the center position of the superconducting magnet. The plurality of load belts 21 may all be connected to the superconducting magnet debugging tool 1, or only a part of the load belts 21 may be connected to the superconducting magnet debugging tool 1. For example, when the position of the superconducting coil is initially debugged, the plurality of load belts 21 may all be connected to the superconducting magnet debugging tool 1. When the cyclotron is running, a part of the load belts 21 may be connected to the superconducting magnet debugging tool 1, and another part of the load belts 21 may be connected to the adaptive adjustment tool 3; specifically, part of the plurality of load belts 21 may be distributed on opposite sides of the cryostat 2 along the X-axis, and another part may be distributed on opposite sides of the cryostat 2 along the Y-axis, wherein the load belts 21 distributed in the X-axis direction may be connected to the adaptive adjustment tool 3, and the load belts 21 distributed in the Y-axis direction may be connected to the superconducting magnet debugging tool 1. The X-axis direction may be the beam-out direction of the beam when the cyclotron is installed on the frame, and the Y-axis direction may intersect with the X-axis direction.

[0063] Reference Figure 5, the adaptive adjustment tool 3 is used to tighten or loosen the load belt 21. The adaptive adjustment tool 3 includes an adjustment component 31 and a connecting pipe 32. The connecting pipe 32 is provided with a threaded connection hole 321 that is threadedly matched with the second threaded portion 211, so that when the connecting pipe 32 rotates, the matching depth between the connecting pipe 32 and the second threaded portion 211 can be changed, thereby tightening or loosening the load belt 21. The adjustment component 31 is connected to the connecting pipe 32 and is used to drive the connecting pipe 32 to rotate. The adjustment component 31 may include a drive motor, a ball screw 311, a gear transmission chain, a control device and other structures. The ball screw 311 is connected to the connecting pipe 32 and is used to drive the connecting pipe 32 to rotate. The transmission shaft of the drive motor is connected to the ball screw 311 through the gear transmission chain to drive the ball screw 311 to rotate. The control device is used to control the operation of the drive motor to control the rotation amount of the ball screw 311 and the connecting pipe 32.

[0064] In some specific embodiments, the adaptive adjustment tool 3 further includes a potentiometer 33, which is used to monitor the movement stroke of the adjustment component 31. For example, the potentiometer 33 can be connected to the ball screw 311 through an elastic coupling, and the potentiometer 33 can convert the rotational motion of the ball screw 311 into a DC voltage signal, which can then be displayed on a display screen connected to the cyclotron for easy observation by the user.

[0065] The Hall sensor 4 may be installed at a middle position of the cryostat 2 to detect the magnetic field at the middle position of the cryostat 2 .

[0066] The present invention also provides a particle therapy device, comprising the aforementioned cyclotron, wherein the particles may be protons or heavy ions, and the cyclotron may provide a proton beam or a heavy ion beam for treating tumors.

[0067] The present application also provides a method for debugging a superconducting magnet that can be applied to the above-mentioned cyclotron accelerator, including steps S01 to S03, and may also include step S04.

[0068] Step S01: Connect the superconducting magnet debugging tool 1 to the load belt 21 of the cryostat 2, and make a preliminary adjustment to the position of the superconducting coil;

[0069] Step S02: dismantle part of the superconducting magnet debugging tool 1 and part of the second debugging section assembly 12 of the superconducting magnet debugging tool 1, install the adaptive adjustment tool 3, and reinstall the dismantled second debugging section assembly 12;

[0070] Step S03: The cyclotron equipped with the superconducting magnet operates to provide a particle beam, and the adaptive adjustment tool 3 applies tension to the load belt 21 to overcome the beam deviation along the X-axis direction caused by gravity of the superconducting coil.

[0071] Step S04: A test instrument is installed at the isocenter of the treatment room, and the test instrument receives the beam emitted by the cyclotron. The test instrument compares the position of the received beam with the predetermined center point of the test instrument to obtain the offset of the beam in the X-axis and Y-axis directions. If the offset of the beam in the X-axis and / or Y-axis directions exceeds the offset threshold, the offset of the superconducting coil in the Y-axis direction is adjusted by the superconducting magnet debugging tool 1, and / or the adaptive adjustment tool 3 is used to adjust the offset of the superconducting coil in the X-axis direction, wherein the X-axis direction intersects the Y-axis direction. The offset threshold can be 3-5 mm, preferably 4 mm.

[0072] In step S01, multiple load belts 21 of the cryostat 2 are connected to the superconducting magnet debugging tool 1, and the superconducting magnet debugging tool 1 connected to the load belt 21 located in the Y-axis direction is tightened or loosened to achieve the adjustment of the superconducting coil in the Y-axis direction, and the superconducting magnet debugging tool 1 connected to the load belt 21 located in the X-axis direction is tightened or loosened to achieve the adjustment of the superconducting coil in the X-axis direction. Among them, the superconducting magnet debugging tool 1 can specifically be used to adjust the position of the superconducting coil in the superconducting magnet so that the superconducting coil is located at a specified position. The specified position of the superconducting coil can be a position where the center position of the superconducting coil coincides with the center position of the cryostat 2, and the offset from the center position of the cryostat 2 in the X-axis and Y-axis directions is less than 0.25mm. Among them, the position offset of the superconducting coil can be measured using a metric gauge pin and a depth gauge.

[0073] In some specific embodiments, step S01 may also include: after the superconducting magnet debugging tool 1 is connected to the load belt 21, the adjustment handle 1221 in the superconducting magnet debugging tool 1 is rotated, when the load belt 21 is not tensioned, the resistance of the adjustment handle 1221 during rotation is small, when the load belt 21 is about to be tensioned, the further rotation of the adjustment handle 1221 will be subject to the resistance from the load belt 21, and at this time, the adjustment handle 1221 is continued to be rotated to tension the load belt 21 and adjust the position of the superconducting coil. When the further movement of the adjustment handle 1221 is about to be subject to the resistance provided by the load belt 21, the scale value indicated by the pointer 1223 on the dial 1222 is recorded, and the scale value here is positioned as the initial scale, and the above-mentioned adjustment is performed on multiple superconducting magnet debugging tools 1, so that each superconducting magnet debugging tool 1 obtains a corresponding initial reading, which is used to indicate the adjustment of the superconducting magnet debugging tool 1. For example, when the position of the superconducting coil in the superconducting magnet needs to be adjusted, the adjustment amount of the superconducting magnet debugging tool 1 can be obtained according to the difference between the actual reading indicated by the pointer 1223 and the dial 1222 and the initial reading. According to the relationship between the change in the adjustment amount of the superconducting magnet debugging tool 1 and the change in the position of the superconducting coil in the superconducting magnet, the rotation angle of the adjustment handle 1221 is adjusted, so that the superconducting coil in the superconducting magnet is located at the specified position.

[0074] When adjusting the superconducting magnet debugging tool 1 connected to the load belt 21 located in the X-axis direction, if the superconducting coil is offset toward the positive X-axis direction, the corresponding superconducting magnet debugging tool 1 can be used to tighten the load belt 21 located in the negative direction of the X-axis, and observe the adjustment amount of the superconducting magnet debugging tool 1 when adjusting the load belt 21 located in the negative direction of the X-axis; the corresponding superconducting magnet debugging tool 1 is made to relax the load belt 21 located in the positive direction of the X-axis, and the adjustment amount of the superconducting magnet debugging tool 1 when adjusting the load belt 21 located in the positive direction of the X-axis is the same as the adjustment amount of the superconducting magnet debugging tool 1 when adjusting the load belt 21 located in the negative direction of the X-axis. If the superconducting coil is offset toward the negative X-axis direction, the corresponding superconducting magnet debugging tool 1 can be used to tighten the load belt 21 located in the positive direction of the X-axis, and the adjustment amount of the superconducting magnet debugging tool 1 when adjusting the load belt 21 located in the positive direction of the X-axis is observed; the corresponding superconducting magnet debugging tool 1 is made to relax the load belt 21 located in the negative direction of the X-axis, and the adjustment amount of the superconducting magnet debugging tool 1 when adjusting the load belt 21 located in the negative direction of the X-axis is the same as the adjustment amount of the superconducting magnet debugging tool 1 when adjusting the load belt 21 located in the positive direction of the X-axis.

[0075] When adjusting the superconducting magnet debugging tool 1 connected to the load belt 21 located in the Y-axis direction, the debugging method of the superconducting magnet debugging tool 1 is the same as that of adjusting the load belt 21 located in the X-axis direction, so it will not be repeated here.

[0076] After the cyclotron is adjusted in step S01, it will be installed on the rack of the treatment room and used for subsequent treatment operations. When the cyclotron is working, the superconducting coil may be offset in the X-axis direction due to the influence of gravity, which may cause the beam to be offset in the X-axis direction. At this time, step S02 can be executed.

[0077] Step S02 specifically includes: the part of the superconducting magnet debugging tool 1 removed is the superconducting magnet debugging tool 1 connected to the load belt 21 located in the X-axis direction, and the load belt 21 located in the X-axis direction is connected to the adaptive adjustment tool 3. When the superconducting magnet debugging tool 1 is removed, the reaction plate 124 can be separated from the plunger 5, and the superconducting magnet debugging tool 1 can be pulled out of the mounting hole 51 of the plunger 5. The adaptive adjustment tool 3 is installed on the plunger 5, and the connecting pipe 32 of the adaptive adjustment tool 3 is threadedly connected to the first threaded portion 1111.

[0078] When installing the adaptive adjustment tool 3, the superconducting magnet debugging tool 1 connected to the load belt 21 in the Y-axis direction may interfere with the adaptive adjustment tool 3. In this case, the second debugging section assembly 12 of the superconducting magnet debugging tool 1 connected to the load belt 21 in the Y-axis direction may be removed, and then the adaptive adjustment tool 3 is installed to avoid interference between the adaptive adjustment tool 3 and the superconducting magnet debugging tool 1. After the adaptive adjustment tool 3 is installed, the second debugging section assembly 12 is reconnected to the first debugging section assembly 11.

[0079] Step S03 may specifically include: using the Hall sensor 4 to detect the center position of the cryostat 2, and the Hall sensor 4 will generate a corresponding voltage value according to the magnetic field strength, and then the Hall sensor 4 can feed back its voltage value. In addition, a magnetic field tester can be used to measure the actual magnetic field of the superconducting magnet, and the magnetic field tester will generate a corresponding voltage value according to the magnetic field strength, and then the magnetic field tester can feed back its voltage value. When the superconducting coil is located at the center position of the cryostat 2, the voltage value fed back by the Hall sensor 4 is substantially the same as the voltage value fed back by the magnetic field tester, and when the difference between the voltage value fed back by the Hall sensor 4 and the voltage value fed back by the magnetic field tester exceeds a predetermined threshold, it indicates that the position of the superconducting coil exceeds the specified position, at which time the control device in the adaptive adjustment tool 3 will control the drive motor to operate to adjust the position of the superconducting coil, and when the difference between the voltage value fed back by the Hall sensor 4 and the voltage value fed back by the magnetic field tester is less than a predetermined threshold, it indicates that the position of the superconducting coil is at a predetermined position, and the adaptive adjustment tool 3 stops running. The predetermined threshold value may be determined according to the acceptable offset of the superconducting coil in the cyclotron. For example, in this embodiment, the predetermined threshold value is 0.003V.

[0080] The adjustment amount of the adaptive adjustment tool 3 is obtained by calculation according to the algorithm. Specifically, when the difference between the voltage value fed back by the Hall sensor 4 and the voltage value fed back by the magnetic field tester exceeds a predetermined threshold, the driving motor in the adaptive adjustment tool 3 runs, the potentiometer 33 measures the rotation amount of the ball screw 311 and will feedback the corresponding voltage value according to the rotation amount of the ball screw 311; the rate of change of the difference between the voltage value fed back by the Hall sensor 4 and the voltage value fed back by the magnetic field tester after the ball screw 311 rotates a certain amount is obtained, and the difference between the voltage value fed back by the Hall sensor 4 and the voltage value fed back by the magnetic field tester is linearly related to the voltage value fed back by the potentiometer 33 after the ball screw 311 rotates, and the algorithm can obtain multiple points according to the voltage value fed back by the potentiometer 33 for different rotation amounts of the ball screw 311, and the difference between the voltage value fed back by the corresponding Hall sensor 4 and the voltage value fed back by the magnetic field tester, and the x coordinate of each point can be the voltage value fed back by the potentiometer 33 after the ball screw 311 rotates, and the y coordinate can be the difference between the voltage value fed back by the Hall sensor 4 and the voltage value fed back by the magnetic field tester. Since the difference between the voltage value fed back by the Hall sensor 4 and the voltage value fed back by the magnetic field tester is linearly related to the voltage value fed back by the potentiometer 33 after the ball screw 311 rotates, that is, the x value and the y value are linearly related, therefore, according to the existing measured multiple point data, a linear interpolation method can be used to obtain the y value corresponding to different x values; and then the difference between the voltage value fed back by the Hall sensor 4 and the voltage value fed back by the magnetic field tester is less than the predetermined threshold value, that is, when the y value is less than the predetermined threshold value, the corresponding x value, that is, the potentiometer 33 feeds back the corresponding voltage value according to the rotation amount of the ball screw 311, and then the amount of rotation required by the ball screw 311 is obtained, so as to obtain the adjustment amount of the adaptive adjustment tool 3. Among them, the time interval and the number of points obtained by obtaining adjacent points can be adjusted, so that the gain or speed of the algorithm can be adjusted, so that the adaptive adjustment tool 3 can be adjusted quickly to adjust the superconducting coil to the specified position within 10 seconds or less.

[0081] In step S04, the test instrument may be an instrument for measuring dose distribution with a registered trademark of Octavius, and the predetermined center point of the treatment instrument may correspond to the isocenter in the treatment room. When the superconducting coil is located at the center of the thermostat, the particle beam formed by the particles emitted by the cyclotron, i.e., the beam, will irradiate the isocenter of the treatment room. When the superconducting coil is offset, the beam formed by the particles emitted by the cyclotron will be offset, and the beam will be offset relative to the predetermined center point of the test instrument. The beam may be a proton beam or a heavy ion beam.

[0082] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and modify the above embodiments within the scope of the invention without departing from the principles and purpose of the present invention. All such changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A cyclotron, characterized in that: include: A superconducting magnet comprises a cryostat (2) and a superconducting coil, wherein the cryostat (2) comprises at least one load belt (21), and the cryostat (2) is provided with an installation space (22); the superconducting coil is installed in the installation space (22) of the cryostat (2); A superconducting magnet debugging tool (1) comprises a first debugging section assembly (11), wherein the first debugging section assembly (11) comprises a first connection unit (111) and a first connection end (112), wherein the first connection end (112) is used for being detachably connected to a second debugging section assembly (12), and the first connection end (112) is used for receiving power to drive the first connection unit (111) to move, and the first connection unit (111) is threadedly connected to a load belt (21) of a cryostat (2) and is used for tightening or loosening the load belt (21).

2. The cyclotron according to claim 1, characterized in that: The first connection unit (111) includes a first threaded portion (1111), the load belt (21) includes a second threaded portion (211), and the first threaded portion (1111) is threadedly connected to the second threaded portion (211); Wherein, the first threaded portion (1111) is a nut and the second threaded portion (211) is a stud, or the first threaded portion (1111) is a stud and the second threaded portion (211) is a nut.

3. The cyclotron according to claim 2, characterized in that: The first connecting unit (111) further comprises a connecting sleeve (1112), wherein a connecting groove (1113) is provided in the connecting sleeve (1112); the first threaded portion (1111) is a nut, and the first threaded portion (1111) is arranged in the connecting groove (1113); wherein the inner contour of the connecting groove (1113) is adapted to the outer contour of the first threaded portion (1111), and the depth of the connecting groove (1113) is greater than the thickness of the first threaded portion (1111).

4. The cyclotron according to claim 2, characterized in that: The first debugging section assembly (11) comprises a first connecting rod (113), one end of the first connecting rod (113) is connected to the first connecting unit (111), and the other end of the first connecting rod (113) forms the first connecting end (112); Wherein, the first connection end (112) is provided with a key slot, or the first connection end (112) is provided with a key.

5. The cyclotron according to claim 4, characterized in that: A plurality of the load belts (21) are provided, and the plurality of load belts (21) are all connected to the superconducting magnet debugging tool (1); Alternatively, the cyclotron further comprises an adaptive adjustment tool (3), a portion of the load belts (21) are connected to the superconducting magnet debugging tool (1), and a portion of the load belts (21) are connected to the adaptive adjustment tool (3).

6. The cyclotron according to claim 5, characterized in that: The adaptive adjustment tool (3) comprises an adjustment component (31) and a connecting pipe (32); the connecting pipe (32) is provided with a threaded connection hole (321) threadedly connected to the second threaded portion (211); the adjustment component (31) is connected to the connecting pipe (32) and is used to drive the connecting pipe (32) to rotate.

7. The cyclotron according to claim 6, characterized in that The adaptive adjustment tool (3) further comprises a potentiometer (33), wherein the potentiometer (33) is used to monitor the movement stroke of the adjustment component (31); And / or, the adaptive adjustment tool (3) is provided in plurality, and the plurality of adaptive adjustment tools (3) are distributed at two opposite ends of the cryostat (2) along the X-axis direction; wherein the X-axis direction is the direction in which the beam is emitted when the cyclotron is installed on a frame.

8. The cyclotron according to claim 6, characterized in that: It also comprises a Hall sensor (4), which is installed at the middle position of the cryostat (2) and is used to detect the magnetic field at the middle position of the cryostat (2).

9. The cyclotron according to claim 8, characterized in that: The superconducting magnet debugging tool further comprises a second debugging section component (12), the second debugging section component (12) comprising a second connecting end (121) and an adjusting unit (122), the second connecting end (121) being detachably connected to the first connecting end (112), at least a portion of the adjusting unit (122) being exposed to the outside, and the adjusting unit (122) being used to drive the second connecting end (121) to move, so as to drive the first debugging section component (11) to move and to tighten or loosen the load belt (21).

10. The cyclotron according to claim 9, characterized in that: The second debugging section assembly (12) comprises a second connecting rod (123), one end of the second connecting rod (123) forms the second connecting end (121), and the other end of the second connecting rod (123) is connected to the adjusting unit (122); When the first connection end (112) is provided with a key slot, the second connection end (121) is provided with a key; when the first connection end (112) is provided with a key, the second connection end (121) is provided with a key slot; the first connection end (112) and the second connection end (121) are connected by a key.

11. The cyclotron according to claim 10, characterized in that: The adjusting unit (122) comprises an adjusting handle (1221), a dial (1222) and a pointer (1223); the adjusting handle (1221) is connected to the first connecting end (112) to drive the second connecting rod (123) to rotate; the dial (1222) is connected to the second connecting rod (123) so that the second connecting rod (123) can drive the dial (1222) to rotate relative to the pointer (1223), or the pointer (1223) is connected to the second connecting rod (123) so that the second connecting rod (123) can drive the pointer (1223) to rotate relative to the dial (1222).

12. The cyclotron according to claim 9, characterized in that: It also includes a reaction plate (124) and a shell (125), wherein at least a portion of the second connecting rod (123) is installed in the shell (125), the reaction plate (124) is sleeved in the shell (125), and the reaction plate (124) is used to be fixedly connected to the plunger (5) of the cyclotron.

13. A superconducting magnet debugging method, applied to the cyclotron accelerator according to any one of claims 1 to 12, characterized in that: The superconducting magnet debugging method comprises: Connecting the superconducting magnet debugging tool (1) to the load belt (21) of the cryostat (2) and making preliminary adjustments to the position of the superconducting coil; Removing part of the superconducting magnet debugging tool (1) and part of the second debugging section component (12) of the superconducting magnet debugging tool (1), installing the adaptive adjustment tool (3), and reinstalling the removed second debugging section component (12); When a cyclotron equipped with a superconducting magnet is in operation, the adaptive adjustment tool (3) applies tension to the load belt (21) to overcome the beam deviation along the X-axis direction caused by gravity of the superconducting coil.

14. The superconducting magnet debugging method according to claim 13, characterized in that: The adaptive adjustment tool (3) applies tension to the load belt (21) to overcome the beam deviation along the X-axis direction caused by gravity of the superconducting coil, specifically comprising: A Hall sensor (4) is used to detect the center position of the cryostat (2) and feed back a voltage value, and a magnetic field tester is used to detect the actual magnetic field of the superconducting magnet and feed back a voltage value. When the difference between the voltage value fed back by the Hall sensor (4) and the voltage value detected by the magnetic field tester exceeds a predetermined threshold, the adaptive adjustment tool (3) is used to adjust the position of the superconducting coil, and the difference between the voltage value fed back by the Hall sensor (4) and the voltage value detected by the magnetic field tester is made smaller than the predetermined threshold.

15. The superconducting magnet debugging method according to claim 13, characterized in that: Also includes: A test instrument is installed at the isocenter of a treatment room and receives a beam emitted by a cyclotron. The test instrument compares the position where the beam is received with a predetermined center point of the test instrument to obtain an offset of the beam in an X-axis direction and a Y-axis direction. If the offset of the beam in an X-axis direction and / or a Y-axis direction exceeds an offset threshold, a superconducting magnet debugging tool (1) is used to adjust the offset of the superconducting coil in the Y-axis direction, and / or an adaptive adjustment tool (3) is used to adjust the offset of the superconducting coil in the X-axis direction, wherein the X-axis direction intersects with the Y-axis direction.

16. The superconducting magnet debugging method according to claim 13, characterized in that: The step of connecting the superconducting magnet debugging tool (1) to the load belt (21) of the cryostat (2) and making a preliminary adjustment on the position of the superconducting coil specifically includes: The superconducting magnet debugging tool (1) comprises a pointer (1223) and a dial (1222). The superconducting magnet debugging tool (1) is connected to the load belt (21). When further movement of the superconducting magnet debugging tool (1) is subject to resistance provided by the load belt (21), the scale indicated by the pointer (1223) is recorded as an initial reading to indicate the adjustment amount of the superconducting magnet debugging tool (1).

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