Cyclotron, superconducting magnet debugging tool, and superconducting magnet debugging method

Abstract

Disclosed in the present application are a cyclotron, a superconducting magnet debugging tool, and a superconducting magnet debugging method. The superconducting magnet debugging tool comprises a first debugging section assembly and a second debugging section assembly. The first debugging section assembly comprises a first connecting unit and a first connecting end. The first connecting unit is used for being connected to a load belt of a low-temperature thermostat. The second debugging section assembly comprises a second connecting end and an adjusting unit. The second connecting end is detachably connected to the first connecting end. At least part of the adjusting unit is exposed to the outside, and the adjusting unit is used for driving the second connecting end to move so as to drive the first debugging section assembly to move and tension or loosen the load belt. The superconducting magnet debugging tool, the cyclotron, and the superconducting magnet debugging method of the present application are used for achieving flexible installation of the superconducting magnet debugging tool, and ensure the normal use of the cyclotron and the proton radiotherapy effect.

Description

Cyclotron, superconducting magnet debugging tool and superconducting magnet debugging method

[0001] This application claims priority to Chinese Patent Application No. 202410536342.9, filed on April 30, 2024, which is incorporated by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of proton therapy systems, for example to a cyclotron, a superconducting magnet debugging tool and a superconducting magnet debugging method. BACKGROUND

[0003] A proton therapy system is a system that provides a proton beam for radiotherapy and can be used to treat diseases such as tumors. One of the main components in the proton therapy system is a cyclotron, which is used to accelerate particles to a corresponding energy required for treatment and then emit a particle beam. After entering the human body, the particle beam releases energy in the tumor and other lesion areas to remove the tumor and other lesion areas. The cyclotron usually uses a superconducting magnet (superconducting magnet) to generate a magnetic field to rotate and focus the particles. The center positioning of the superconducting coil in the cyclotron affects the direction of the particle motion, and thus affects the beam quality of the particle beam and the treatment effect of the patient's tumor.

[0004] In the related art cyclotron, to achieve the center positioning of the superconducting coil position, the cryostat is provided with a plurality of support belts, which can be connected with the debugging tool to adjust the tension applied by the debugging tool to the support belt, so as to adjust the superconducting coil installed in the cryostat to ensure that the superconducting coil is located at the expected position. The debugging tool in the related art occupies a large space after installation, which may interfere with the connection of the cryostat 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 since the debugging tool is removed, the position of the superconducting coil cannot be adjusted. If the position of the superconducting coil needs to be adjusted, the components interfering with the debugging tool need to be removed and the debugging tool needs to be installed. After the debugging of the debugging tool is completed, the debugging tool needs to be removed and the components interfering with the debugging tool need to be installed. The process is complicated and affects the operation of the proton therapy system and the treatment effect. SUMMARY

[0005] The purpose of the present application is to provide a cyclotron, a superconducting magnet debugging tool and a superconducting magnet debugging method, which can realize flexible installation of the superconducting magnet debugging tool and reduce the risk of interference between the superconducting magnet debugging tool and other parts.

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

[0007] A superconducting magnet debugging tool, wherein the superconducting magnet comprises a cryostat and a superconducting coil installed in the cryostat, the superconducting magnet debugging tool comprises:

[0008] a first debugging section assembly comprising a first connecting unit and a first connecting end, the first connecting unit being used for connecting with a load belt of the cryostat;

[0009] a second debugging section assembly comprising a second connecting end and an adjusting unit, the second connecting end being detachably connected with the first connecting end, at least a part of the adjusting unit being exposed to the outside, and the adjusting unit being used for driving the second connecting end to move, so as to drive the first debugging section assembly to move and tension or loosen the load belt.

[0010] In some optional embodiments, the first connecting unit comprises a first threaded part, the load belt comprises a second threaded part, and the first threaded part is threadedly connected with the second threaded part.

[0011] In some optional embodiments, the first threaded part is a nut, and the second threaded part is a stud, or the first threaded part is a stud, and the second threaded part is a nut.

[0012] In some optional embodiments, the first connecting unit further comprises a connecting sleeve, and a connecting groove is formed in the connecting sleeve; the first threaded part is a nut, and the first threaded part is arranged in the connecting groove; wherein an inner contour of the connecting groove is matched with an outer contour of the first threaded part, and a depth of the connecting groove is greater than a thickness of the first threaded part.

[0013] In some optional embodiments, the first debugging section assembly comprises a first connecting rod, one end of the first connecting rod is connected with the first connecting unit, and the other end of the first connecting rod forms the first connecting end.

[0014] 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 with the adjusting unit.

[0015] In some optional embodiments, the first connecting end is provided with a key groove, and the second connecting end is provided with a key, or the first connecting end is provided with a key, and the second connecting end is provided with a key groove; the first connecting end is key-connected with the second connecting end.

[0016] In some optional embodiments, the adjusting unit comprises an adjusting handle, a scale disc, and a pointer; the adjusting handle is connected with the first connecting end to drive the second connecting rod to rotate; the scale disc is connected with the second connecting rod to enable the second connecting rod to drive the scale disc to rotate relative to the pointer, or the pointer is connected with the second connecting rod to enable the second connecting rod to drive the pointer to rotate relative to the scale disc.

[0017] In some optional embodiments, further comprising 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 on the shell, and the reaction plate is used to be fixedly connected with a plunger of the cyclotron.

[0018] A cyclotron comprises:

[0019] 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 a mounting space; the superconducting coil is installed in the mounting space of the cryostat.

[0020] At least one superconducting magnet debugging tool of any one of the above is connected with the load belt.

[0021] In some optional embodiments, a plurality of load belts are provided, and the plurality of load belts are connected with the superconducting magnet debugging tool.

[0022] Alternatively, the cyclotron further comprises an adaptive adjustment tool, a part of the load belts are connected with the superconducting magnet debugging tool, and a part of the load belts are connected with the adaptive adjustment tool.

[0023] In some optional embodiments, the adaptive adjustment tool comprises an adjusting assembly and a connecting pipe; the connecting pipe is provided with a threaded connecting hole which is threadedly connected with the second threaded part; and the adjusting assembly is connected with the connecting pipe and is used to drive the connecting pipe to rotate.

[0024] In some optional embodiments, the adaptive adjustment tool further comprises a potentiometer which is used to monitor the movement stroke of the adjusting assembly.

[0025] And / or, a plurality of adaptive adjustment tools are provided, and the plurality of adaptive adjustment tools are distributed at opposite ends of the cryostat along an X-axis direction; wherein the X-axis direction is the beam-out direction of the beam of the cyclotron when the cyclotron is installed in a rack.

[0026] In some optional embodiments, a Hall sensor is further included, the Hall sensor is installed at a middle position of the cryostat and is used to detect the magnetic field at the middle position of the cryostat.

[0027] A superconducting magnet debugging method applied to any one of the cyclotrons, the superconducting magnet debugging method comprising:

[0028] connecting the superconducting magnet debugging tool to the load belt of the cryostat, and preliminarily adjusting the position of the superconducting coil;

[0029] removing part of the superconducting magnet debugging tool, and removing 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;

[0030] operating the cyclotron with the superconducting magnet, and the adaptive adjustment tool applies tension to the load belt to overcome the shift of the beam along the X-axis direction of the superconducting coil due to gravity.

[0031] In some optional embodiments, the adaptive adjustment tool applies tension to the load belt to overcome the shift of the beam along the X-axis direction of the superconducting coil due to gravity specifically comprises:

[0032] detecting the center position of the cryostat by using a Hall sensor and feeding back a voltage value, detecting the actual magnetic field of the superconducting magnet by using a magnetic field tester and feeding 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, adjusting the position of the superconducting coil by using the adaptive adjustment tool, and making the difference between the voltage value fed back by the Hall sensor and the voltage value detected by the magnetic field tester less than the predetermined threshold.

[0033] In some optional embodiments, further comprising:

[0034] installing a test instrument 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 shift of the beam in the X-axis direction and the Y-axis direction, if the shift of the beam in the X-axis direction and / or the Y-axis direction exceeds a shift threshold, adjusting the shift of the superconducting coil in the Y-axis direction by using the superconducting magnet debugging tool, and / or adjusting the shift of the superconducting coil in the X-axis direction by using the adaptive adjustment tool, wherein the X-axis direction intersects the Y-axis direction.

[0035] In some optional embodiments, the superconducting magnet debugging tool is connected to the load belt of the cryostat, and the position of the superconducting coil is preliminarily adjusted specifically comprises:

[0036] The superconducting magnet debugging tool comprises a pointer and a dial, the superconducting magnet debugging tool is connected to the load belt, and when further movement of the superconducting magnet debugging tool is resisted by the resistance provided by the load belt, the dial indicated by the recording pointer is recorded as an initial reading for indicating the amount of adjustment of the superconducting magnet debugging tool.

[0037] The cyclotron, the superconducting magnet debugging tool and the superconducting magnet debugging method have at least the following advantages:

[0038] By adopting the first debugging section assembly and the second debugging section assembly, and the first connecting end in the first debugging section assembly and the second connecting end in the second debugging section assembly can be detachably connected, so that the second debugging section assembly can be separated from the first debugging section assembly when needed, and the risk of interference between the superconducting magnet debugging tool and other components during installation is reduced; and the first debugging section assembly and the second debugging section assembly which can be separated make the installation of the superconducting magnet debugging tool more flexible. BRIEF DESCRIPTION OF DRAWINGS

[0039] Fig. 1 is a structural schematic diagram of a cyclotron according to an embodiment of the present application;

[0040] Fig. 2 is a sectional view of the cyclotron according to an embodiment of the present application;

[0041] Fig. 3 is a partial sectional view of the cyclotron according to an embodiment of the present application;

[0042] Fig. 4 is a structural schematic diagram of a superconducting magnet debugging tool according to an embodiment of the present application;

[0043] Fig. 5 is another partial sectional view of the cyclotron according to an embodiment of the present application.

[0044] In the drawings: 1, superconducting magnet debugging tool; 11, first debugging section assembly; 111, first connecting unit; 1111, first threaded part; 1112, connecting sleeve; 1113, connecting groove; 1114, first connecting slot; 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, adjusting sleeve; 123, second connecting rod; 1231, second connecting slot; 1232, clamp; 124, reaction plate; 125, shell; 2, cryostat; 21, load belt; 211, second threaded part; 22, installation space; 3, self-adaptive adjusting tool; 31, adjusting 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

[0045] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations can be implemented in any

[0046] The words expressing position and direction described in this application are described with reference to the drawings, but changes can be made according to needs, and the changes are included in the protection scope of this application.

[0047] As shown in FIG. 3 and FIG. 4, the present application 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 exert adjustable tension on the load belt 21, thereby realizing the adjustment of the position of the superconducting magnet, specifically, the adjustment of 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 segment assembly 11 and a second debugging segment assembly 12, and can further include a shell 125 and a reaction plate 124.

[0048] The first debugging segment assembly 11 is used to connect with the load belt 21 of the cryostat 2. The first debugging segment assembly 11 includes a first connecting unit 111 and a first connecting rod 113. One end of the first connecting rod 113 is connected with the first connecting unit 111, and the other end forms a first connecting end 112 connected with the second debugging segment assembly 12. The first connecting end 112 can receive power transmitted from the second debugging segment assembly 12 and drive the first connecting unit 111 connected with the first connecting rod 113 to move.

[0049] The first connecting unit 111 is connected with the load belt 21 of the cryostat 2 and can realize the tensioning or loosening of the load belt 21 through its own movement. Specifically, the first connecting unit 111 includes a first threaded part 1111, and the load belt 21 includes a second threaded part 211. The first threaded part 1111 and the second threaded part 211 are threadedly connected, and when the first threaded part 1111 in the first connecting unit 111 rotates, the fitting depth of the second threaded part 211 with the first threaded part 1111 will change. Among them, the position of the first connecting unit 111 can be kept relatively fixed, that is, the first connecting unit 111 only rotates without moving, at this time, the change of the fitting depth of the second threaded part 211 with the first threaded part 1111 will drive the load belt 21 to move, thereby realizing the adjustment of the position of the superconducting coil in the superconducting magnet.

[0050] In some embodiments, the first threaded part 1111 is a nut, and the second threaded part 211 is a stud. The first connecting unit 111 further comprises a connecting sleeve 1112. The connecting sleeve 1112 is sleeved on the first threaded part 1111 and connected with the first connecting rod 113. Specifically, the connecting sleeve 1112 is provided with a connecting groove 1113 with an opening facing the first threaded part 1111, and the inner contour of the connecting groove 1113 is adapted to the outer contour of the first threaded part 1111, i.e., the shape and size of the inner contour of the connecting groove 1113 are the same as or similar to those of the outer contour of the first threaded part 1111. Wherein, the outer contour of the first threaded part 1111 is a non-circular contour, so when the connecting sleeve 1112 is sleeved on the first threaded part 1111, the connecting sleeve 1112 can drive the first threaded part 1111 to rotate synchronously, thereby changing the fitting depth of the first threaded part 1111 and the second threaded part 211.

[0051] The end of the connecting sleeve 1112 facing the first connecting rod 113 can be provided with a first connecting groove 1114, and the first connecting groove 1114 is adapted to the first connecting rod 113, i.e., the shape and size of the inner contour of the first connecting groove 1114 are the same as or similar to those of the outer contour of the part of the first connecting rod 113 for insertion into the first connecting groove 1114. Wherein, at least one part of the outer side of the first connecting rod 113 for insertion into the first connecting groove 1114 is a plane, so that the first connecting rod 113 can drive the connecting sleeve 1112 to rotate when the first connecting rod 113 rotates. Specifically, the part of the first connecting rod 113 for insertion 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 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.

[0052] When the first threaded part 1111 is fitted with the second threaded part 211, the end of the second threaded part 211 can exceed the end face of the first threaded part 1111 and extend into the connecting groove 1113. In order to avoid interference between the part of the second threaded part 211 exceeding the first threaded part 1111 and the connecting sleeve 1112, the depth of the connecting sleeve 1112 is greater than the thickness of the first threaded part 1111, so that after the connecting sleeve 1112 is sleeved on the first threaded part 1111, a certain space can still be reserved in the depth direction of the connecting sleeve 1112. This space can be used to accommodate the part of the second threaded part 211 exceeding the first threaded part 1111, so as to avoid interference between the second threaded part 211 and the first sleeve. Wherein, the depth direction of the connecting sleeve 1112 and the thickness direction of the first threaded part 1111 can be parallel to the moving direction of the second threaded part 211.

[0053] In yet some embodiments, the first threaded part 1111 can also be a stud, and the second threaded part 211 can also be a nut. The first connecting rod 113 can be inserted into the first threaded part 1111 and connected with the first connecting rod 113 in an interference fit. As a preferred embodiment, the first threaded part 1111 is specifically a nut, and the second threaded part 211 is specifically a stud.

[0054] At least a part of the second debugging section assembly 12 is exposed to the outside world for receiving external power to drive the first debugging section assembly 11 to move. The second debugging section assembly 12 comprises an adjusting 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 for detachable connection with the first connecting end 112 of the first connecting rod 113, and the other end of the second connecting rod 123 is connected with the adjusting unit 122. The second connecting rod 123 can be keyed with the first connecting rod 113. Specifically, the second connecting end 121 of the second connecting rod 123 is formed with one or more keys, and when the keys are provided in multiple, the multiple keys can be distributed equidistantly 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 groove matched with the second connecting end 121. When the first connecting rod 113 is matched with the second connecting rod 123, due to the matching of the key and the key groove, 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 it is needed to separate the first debugging section assembly 11 from the second debugging section assembly 12, the second connecting rod 123 of the second debugging section assembly 12 can be pulled out of the key groove to realize the separation of the first debugging section assembly 11 from the second debugging section assembly 12. It should be noted that in other embodiments, the second connecting end 121 of the second connecting rod 123 can be formed with a key groove, and the first connecting end 112 of the first connecting rod 113 can be formed with a key to realize the key connection of the second connecting rod 123 with the first connecting rod 113.

[0055] At least part of the adjusting unit 122 is exposed to the outside, and specifically, an adjusting end of the adjusting unit 122 is exposed to the outside, so that the user can apply a force to the adjusting unit 122, thereby driving the first debugging segment assembly 11 to move. The adjusting unit 122 can include an adjusting handle 1221, a connecting column 1224, and an adjusting sleeve 1225. The connecting column 1224 is connected with 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 matched with the connecting column 1224, that is, the shape and size of the outer contour of the second connecting groove 1231 are the same as or similar to those 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.

[0056] The adjusting sleeve 1225 is sleeved on the connecting column 1224 and can drive the connecting column 1224 to rotate. To improve the stability of the connection between the adjusting sleeve 1225 and the connecting column 1224, the adjusting 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 adjusting sleeve 1225 and abut against the connecting column 1224, so as to press the connecting column 1224, thereby improving the stability of the connection between the adjusting sleeve 1225 and the connecting column 1224. The adjusting end of the adjusting sleeve 1225 is exposed to the outside.

[0057] The adjusting handle 1221 can be sleeved on the adjusting end of the adjusting sleeve 1225, so as to be connected with the first connecting end 112 through the adjusting sleeve 1225 and the connecting column 1224, thereby enabling the adjusting handle 1221 to drive the second connecting rod 123 to rotate, and the second connecting end 121 of the second connecting rod 123 drives the first debugging segment assembly 11 to rotate, so as to tension or loosen the load belt 21. The adjusting end of the adjusting sleeve 1225 can be a hexagonal column, and the adjusting handle 1221 can be provided with a hexagonal hole matched with the hexagonal column.

[0058] In order to facilitate the observation of the adjustment angle of the first adjustment segment assembly 11, the adjustment unit 122 can further include a dial 1222 and a pointer 1223. The dial 1222 is provided with a plurality of uniformly distributed scales. The dial 1222 can be connected with 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 with a clamp 1232 which is tightly fixed to the second connecting rod 123, and the dial 1222 is installed on the clamp 1232 by means of screws or other fasteners; the pointer 1223 can be fixed relative to the second connecting rod 123, for example, the pointer 1223 is installed on the shell 125 or the reaction plate 124, and is preferably arranged on the shell 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 adjustment segment assembly 11 of the handle can be determined by the change amount of the scale value of the dial 1222. Alternatively, the pointer 1223 can be connected with 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 with a clamp 1232 which is tightly fixed to the second connecting rod 123, and the pointer 1223 is installed on the clamp 1232 by means of screws or other fasteners; the dial 1222 can be fixed relative to the second connecting rod 123, for example, the dial 1222 is installed on the shell 125 or the reaction plate 124, and is preferably arranged on the shell 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 adjustment segment assembly 11 of the handle can be determined by the change amount of the scale value of the dial 1222.

[0059] The shell 125 is hollow inside, and can be sleeved on the first adjustment segment assembly 11 and at least part of the second adjustment segment assembly. The reaction plate 124 is sleeved on the shell 125, and can be fixedly connected with the plunger 5 for installing the superconducting magnet adjustment tool 1 in the cyclotron, for example, the reaction plate 124 is fixedly installed on the plunger 5 by means of screws or other fasteners.

[0060] Referring to FIGS. 1 and 2, the present application further provides a cyclotron, which comprises a superconducting magnet and the above-mentioned superconducting magnet adjustment tool 1, and can further comprise a Hall sensor 4, an adaptive adjustment tool 3, an iron yoke 6 and a plunger 5. The superconducting magnet comprises a cryostat 2 and a superconducting coil located in the cryostat.

[0061] The iron yoke 6 and the plunger 5 are arranged at the outer periphery of the cryostat 2. The plunger 5 is used to mount the superconducting magnet commissioning tool 1 and the adaptive tuning tool 3. Specifically, the plunger 5 can be provided with a mounting hole 51, which can extend to the load belt 21 of the cryostat 2. The superconducting magnet commissioning tool 1 and the adaptive tuning tool 3 can be mounted in the mounting hole 51, so that the superconducting magnet commissioning tool 1 and the adaptive tuning tool 3 can be connected with the load belt 21 of the cryostat 2.

[0062] The cryostat 2 comprises at least one load belt 21, and is provided with a mounting space 22. The coil of the superconducting magnet (superconducting coil) can be mounted in the mounting space 22 of the cryostat 2, and the cryostat 2 is used to keep the temperature in the mounting space 22 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 tensioned or relaxed, it can drive the superconducting coil to move, thereby adjusting the position of the superconducting coil; the other end of the load belt 21 can be connected with the superconducting magnet commissioning tool 1 or the adaptive tuning tool 3, so that the superconducting magnet commissioning tool 1 or the adaptive tuning tool 3 can tension or relax the load belt 21.

[0063] The load belt 21 can be provided in plurality, and the load belt 21 is preferably provided in even number, and the even number of load belts 21 are symmetrically distributed along the central position of the superconducting magnet. The plurality of load belts 21 can all be connected with the superconducting magnet commissioning tool 1, or only a part of the plurality of load belts 21 are connected with the superconducting magnet commissioning tool 1. For example, when the position of the superconducting coil is initially adjusted, the plurality of load belts 21 are all connected with the superconducting magnet commissioning tool 1. When the cyclotron is running, a part of the plurality of load belts 21 are connected with the superconducting magnet commissioning tool 1, and the other part of the plurality of load belts 21 are connected with the adaptive tuning tool 3; specifically, a part of the plurality of load belts 21 are distributed on the opposite sides of the cryostat 2 along the X-axis direction, and the other part of the plurality of load belts 21 are distributed on the opposite sides of the cryostat 2 along the Y-axis direction, wherein the load belts 21 distributed along the X-axis direction are connected with the adaptive tuning tool 3, and the load belts 21 distributed along the Y-axis direction are connected with the superconducting magnet commissioning tool 1. The X-axis direction can be the beam-out direction of the beam of the cyclotron when the cyclotron is installed in the gantry, and the Y-axis direction intersects the X-axis direction.

[0064] Referring to FIG. 5, the adaptive adjustment tool 3 is used to tighten or loosen the load belt 21. The adaptive adjustment tool 3 comprises an adjustment assembly 31 and a connecting pipe 32. The connecting pipe 32 is provided with a threaded connection hole 321 which is threadedly connected with the second threaded part 211, so that when the connecting pipe 32 rotates, the depth of the connection between the connecting pipe 32 and the second threaded part 211 can be changed, thereby tightening or loosening the load belt 21. The adjustment assembly 31 is connected with the connecting pipe 32 and is used to drive the connecting pipe 32 to rotate. The adjustment assembly 31 can comprise a driving motor, a ball screw 311, a gear transmission chain, a control device and the like. The ball screw 311 is connected with the connecting pipe 32 and is used to drive the connecting pipe 32 to rotate. The transmission shaft of the driving motor is connected with the ball screw 311 through the gear transmission chain, so as to drive the ball screw 311 to rotate. The control device is used to control the operation of the driving motor, so as to control the rotation amount of the ball screw 311 and the connecting pipe 32.

[0065] In some embodiments, the adaptive adjustment tool 3 further comprises a potentiometer 33 which is used to monitor the movement stroke of the adjustment assembly 31. For example, the potentiometer 33 can be connected with the ball screw 311 through an elastic coupling, and the potentiometer 33 can convert the rotational movement of the ball screw 311 into a direct current voltage signal which can be displayed on a display screen connected with the cyclotron, so as to facilitate the user to observe.

[0066] The Hall sensor 4 can be installed at the middle position of the cryostat 2, so as to detect the magnetic field at the middle position of the cryostat 2.

[0067] The present application also provides a particle therapy device comprising the aforementioned cyclotron, wherein the particles can be protons or heavy ions, and the cyclotron can provide a proton beam or a heavy ion beam for tumor treatment.

[0068] The present application also provides a debugging method of the superconducting magnet which can be applied to the aforementioned cyclotron, comprising steps S01 to S03, and can further comprise step S04.

[0069] Step S01: connecting the superconducting magnet debugging tool 1 to the load belt 21 of the cryostat 2, and preliminarily adjusting the position of the superconducting coil;

[0070] Step S02: removing part of the superconducting magnet debugging tool 1, removing part of the second debugging section assembly 12 of the superconducting magnet debugging tool 1, installing the adaptive adjustment tool 3, and reinstalling the removed second debugging section assembly 12;

[0071] Step S03: operating the cyclotron provided with the superconducting magnet to provide a particle beam, and the adaptive adjustment tool 3 applies tension to the load belt 21 to overcome the deviation of the beam along the X-axis direction caused by the gravity of the superconducting coil.

[0072] Step S04: The test instrument is installed at the isocenter of the treatment room and 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 direction and the Y-axis direction. If the offset of the beam in the X-axis direction and / or the Y-axis direction exceeds the offset threshold, the superconducting magnet adjustment tool 1 is used to adjust the offset of the superconducting coil in the Y-axis direction, and / or the adaptive adjustment tool 3 is used to adjust the offset of the superconducting coil in the X-axis direction. The X-axis direction intersects the Y-axis direction. The offset threshold can be 3-5 mm, preferably 4 mm.

[0073] In step S01, the plurality of load belts 21 of the cryostat 2 are connected to the superconducting magnet adjustment tool 1. The superconducting magnet adjustment tool 1 connected to the load belt 21 in the Y-axis direction is tightened or loosened to adjust the superconducting coil in the Y-axis direction. The superconducting magnet adjustment tool 1 connected to the load belt 21 in the X-axis direction is tightened or loosened to adjust the superconducting coil in the X-axis direction. The superconducting magnet adjustment tool 1 can specifically 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 of the superconducting coil coincides with the center of the cryostat 2, or a position where the offset of the center of the superconducting coil from the center of the cryostat 2 in the X-axis direction and the Y-axis direction is less than 0.25 mm. The position offset of the superconducting coil can be measured by using a metric gauge pin and a depth gauge.

[0074] In some embodiments, after the superconducting magnet adjustment tool 1 is connected to the load belt 21, the adjustment handle 1221 in the superconducting magnet adjustment tool 1 is rotated. When the load belt 21 is not tightened, the resistance of the adjustment handle 1221 is small when it is rotated. When the load belt 21 is about to be tightened, further rotation of the adjustment handle 1221 will be resisted by the load belt 21. At this time, further rotation of the adjustment handle 1221 can tighten 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 resisted by the load belt 21, the scale value indicated by the pointer 1223 on the scale disc 1222 is recorded, and the scale value is set as the initial scale. The above adjustment is performed on each superconducting magnet adjustment tool 1 to obtain an initial reading for each superconducting magnet adjustment tool 1, which is used to indicate the adjustment of the superconducting magnet adjustment 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 adjustment tool 1 can be obtained according to the difference between the actual reading and the initial reading indicated by the pointer 1223 and the scale disc 1222. According to the relationship between the change of the adjustment amount of the superconducting magnet adjustment tool 1 and the change of the position of the superconducting coil in the superconducting magnet, the rotation angle of the adjustment handle 1221 is adjusted, and then the superconducting coil in the superconducting magnet is located at the specified position.

[0075] When adjusting the superconducting magnet adjustment tool 1 connected with the load belt 21 located in the X-axis direction, if the superconducting coil is offset towards the positive X-axis direction, the corresponding superconducting magnet adjustment tool 1 can be used to tighten the load belt 21 located in the negative X-axis direction, and the adjustment amount of the superconducting magnet adjustment tool 1 adjusting the load belt 21 located in the negative X-axis direction is observed; the corresponding superconducting magnet adjustment tool 1 is used to loosen the load belt 21 located in the positive X-axis direction, and the adjustment amount of the superconducting magnet adjustment tool 1 adjusting the load belt 21 located in the positive X-axis direction is the same as the adjustment amount of the superconducting magnet adjustment tool 1 adjusting the load belt 21 located in the negative X-axis direction. If the superconducting coil is offset towards the negative X-axis direction, the corresponding superconducting magnet adjustment tool 1 can be used to tighten the load belt 21 located in the positive X-axis direction, and the adjustment amount of the superconducting magnet adjustment tool 1 adjusting the load belt 21 located in the positive X-axis direction is observed; the corresponding superconducting magnet adjustment tool 1 is used to loosen the load belt 21 located in the negative X-axis direction, and the adjustment amount of the superconducting magnet adjustment tool 1 adjusting the load belt 21 located in the negative X-axis direction is the same as the adjustment amount of the superconducting magnet adjustment tool 1 adjusting the load belt 21 located in the positive X-axis direction.

[0076] When adjusting the superconducting magnet adjustment tool 1 connected with the load belt 21 located in the Y-axis direction, the adjustment method of the superconducting magnet adjustment tool 1 is the same as that when adjusting the load belt 21 located in the X-axis direction, and thus will not be described here.

[0077] When the cyclotron performs the adjustment of step S01, it will be installed on the gantry in 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, thereby causing the beam to be offset in the X-axis direction. At this time, step S02 can be performed.

[0078] Step S02 specifically includes: the removed part of the superconducting magnet adjustment tool 1 is the superconducting magnet adjustment tool 1 connected with the load belt 21 located in the X-axis direction, and the load belt 21 located in the X-axis direction is connected with the adaptive adjustment tool 3. When the superconducting magnet adjustment tool 1 is removed, the reaction plate 124 can be separated from the plunger 5, and the superconducting magnet adjustment tool 1 is 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 with the first threaded portion 1111.

[0079] When the adaptive adjustment tool 3 is installed, the superconducting magnet commissioning tool 1 connected with the load band 21 in the Y-axis direction can interfere with the adaptive adjustment tool 3. At this time, the second commissioning section assembly 12 of the superconducting magnet commissioning tool 1 connected with the load band 21 in the Y-axis direction can be disassembled, and then the adaptive adjustment tool 3 is installed to avoid interference between the adaptive adjustment tool 3 and the superconducting magnet commissioning tool 1. After the installation of the adaptive adjustment tool 3 is completed, the second commissioning section assembly 12 is reconnected with the first commissioning section assembly 11.

[0080] The step S03 can specifically include: detecting the center position of the cryostat 2 by using the Hall sensor 4, and the Hall sensor 4 can generate a corresponding voltage value according to the magnetic field strength, and then the Hall sensor 4 can feed back the voltage value. And the actual magnetic field of the superconducting magnet can be measured by using a magnetic field tester, and the magnetic field tester can generate a corresponding voltage value according to the magnetic field strength, and then the magnetic field tester can feed back the 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 basically 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 value, it indicates that the position of the superconducting coil exceeds the specified position, at this time the control device in the adaptive adjustment tool 3 controls the driving motor to run to adjust the position of the superconducting coil, 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 the predetermined threshold value, it indicates that the position of the superconducting coil is in the predetermined position, and the adaptive adjustment tool 3 stops running. The predetermined threshold value can be determined according to the acceptable superconducting coil offset in the cyclotron, for example, in this embodiment, the predetermined threshold value is 0.003V.

[0081] The adjustment amount of the adaptive adjustment tool 3 is obtained 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 operates, the potentiometer 33 measures the rotation amount of the ball screw 311 and feeds back 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, the difference between the voltage value fed back by the Hall sensor 4 and the voltage value fed back by the magnetic field tester has a linear relationship with the voltage value fed back by the potentiometer 33 after the rotation of the ball screw 311, and the algorithm can obtain multiple points according to the voltage value fed back by the potentiometer 33 at different rotation amounts of the ball screw 311 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. The x-coordinate of each point can be the voltage value fed back by the potentiometer 33 after the rotation of the ball screw 311, 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 has a linear relationship with the voltage value fed back by the potentiometer 33 after the rotation of the ball screw 311, i.e., the x value has a linear relationship with the y value, therefore, according to the measured multiple point data, the linear interpolation method can be used to obtain the y value corresponding to different x values; and then 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 the predetermined threshold, i.e., the y value is less than the predetermined threshold, the corresponding x value, i.e., the voltage value fed back by the potentiometer 33 according to the rotation amount of the ball screw 311, is obtained, and then the rotation amount required by the ball screw 311 is obtained to obtain the adjustment amount of the adaptive adjustment tool 3. The time interval obtained by the adjacent points and the number of 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 quickly adjusted to adjust the superconducting coil to the specified position within 10 seconds or less.

[0082] In step S04, the tester can use a registered trademark Octavius instrument for measuring dose distribution, and the predetermined center point of the treatment instrument can correspond to the isocenter point in the treatment room. When the superconducting coil is located at the center position of the thermostat, the particle beam formed by the particles emitted by the cyclotron will irradiate the isocenter point in the treatment room. When the superconducting coil is offset, the beam formed by the particles emitted by the cyclotron will be offset, and will cause the beam to be offset relative to the predetermined center point of the tester. The beam can be a proton beam or a heavy ion beam.

Claims

1. A superconducting magnet commissioning tool, wherein, The superconducting magnet comprises a cryostat (2) and a superconducting coil installed in the cryostat (2), wherein the superconducting magnet debugging tool comprises: A first debugging section assembly (11) comprising a first connecting unit (111) and a first connecting end (112), the first connecting unit (111) being used for connecting with a load belt (21) of the cryostat (2); A second debugging section assembly (12) comprising a second connecting end (121) and an adjusting unit (122), the second connecting end (121) being detachably connected with the first connecting end (112), at least a part of the adjusting unit (122) being exposed to the outside, and the adjusting unit (122) being used for driving the second connecting end (121) to move, so as to drive the first debugging section assembly (11) to move and tension or loosen the load belt (21).

2. The superconducting magnet commissioning tool of claim 1, wherein, The first connecting unit (111) comprises a first threaded part (1111), and the load belt (21) comprises a second threaded part (211), the first threaded part (1111) being threadedly connected with the second threaded part (211); In the first threaded part (1111) is a nut, and the second threaded part (211) is a stud, or the first threaded part (1111) is a stud, and the second threaded part (211) is a nut.

3. The superconducting magnet commissioning tool of claim 2, wherein, The first connecting unit (111) further comprises a connecting sleeve (1112) with a connecting groove (1113) formed therein; the first threaded part (1111) is a nut, and the first threaded part (1111) is arranged in the connecting groove (1113); wherein an inner contour of the connecting groove (1113) is adapted to an outer contour of the first threaded part (1111), and a depth of the connecting groove (1113) is greater than a thickness of the first threaded part (1111).

4. The superconducting magnet commissioning tool of claim 1, wherein, The first debugging section assembly (11) comprises a first connecting rod (113), one end of the first connecting rod (113) being connected with the first connecting unit (111), and the other end of the first connecting rod (113) forming the first connecting end (112); The second debugging section assembly (12) comprises a second connecting rod (123), one end of the second connecting rod (123) forming the second connecting end (121), and the other end of the second connecting rod (123) being connected with the adjusting unit (122); In the first connecting end (112) is formed with a key groove, and the second connecting end (121) is provided with a key, or the first connecting end (112) is provided with a key, and the second connecting end (121) is formed with a key groove; the first connecting end (112) and the second connecting end (121) are key-connected.

5. The superconducting magnet commissioning tool of claim 4, wherein, The adjusting unit (122) comprises an adjusting handle (1221), a scale disc (1222), and a pointer (1223); the adjusting handle (1221) is connected with the first connecting end (112) to drive the second connecting rod (123) to rotate; the scale disc (1222) is connected with the second connecting rod (123) to enable the second connecting rod (123) to drive the scale disc (1222) to rotate relative to the pointer (1223), or the pointer (1223) is connected with the second connecting rod (123) to enable the second connecting rod (123) to drive the pointer (1223) to rotate relative to the scale disc (1222).

6. The superconducting magnet commissioning tool of claim 1, wherein, Further comprising a reaction plate (124) and a shell (125), at least a part of the second connecting rod (123) is installed in the shell (125), and the reaction plate (124) is sleeved on the shell (125), and the reaction plate (124) is used for fixedly connecting with the plunger (5) of the cyclotron.

7. A cyclotron, wherein, Comprise: A superconducting magnet comprising 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 a mounting space (22); the superconducting coil is installed in the mounting space (22) of the cryostat (2); At least one superconducting magnet debugging tool (1) according to any one of claims 1 to 6 is connected with the load belt (21).

8. The cyclotron of claim 7, wherein, The load belt (21) is provided with a plurality of load belts (21), and the plurality of load belts (21) are connected with the superconducting magnet debugging tool (1); Or, the cyclotron further comprises an adaptive adjustment tool (3), a part of the load belts (21) are connected with the superconducting magnet debugging tool (1), and a part of the load belts (21) are connected with the adaptive adjustment tool (3).

9. The cyclotron of claim 8, wherein, The adaptive adjustment tool (3) comprises an adjusting assembly (31) and a connecting pipe (32); the connecting pipe (32) is provided with a threaded connection hole (321) which is threadedly connected with the second threaded part (211); the adjusting assembly (31) is connected with the connecting pipe (32) and is used to drive the connecting pipe (32) to rotate.

10. The cyclotron of claim 9, wherein, The adaptive adjustment tool (3) further comprises a potentiometer (33) which is used to monitor the movement stroke of the adjusting assembly (31); And / or, the adaptive adjustment tool (3) is provided with a plurality of adaptive adjustment tools (3), and the plurality of adaptive adjustment tools (3) are distributed at opposite ends of the cryostat (2) along an X-axis direction; wherein the X-axis direction is the direction of the beam out of the beam when the cyclotron is installed in a rack.

11. The cyclotron of claim 8, wherein, Further comprising a Hall sensor (4) which is installed at a middle position of the cryostat (2) and is used to detect the magnetic field at the middle position of the cryostat (2).

12. A method of commissioning a superconducting magnet for use in a cyclotron as claimed in any one of claims 7 to 11, wherein, The superconducting magnet debugging method comprises: Connecting the superconducting magnet debugging tool (1) to the load belt (21) of the cryostat (2) and preliminarily adjusting the position of the superconducting coil; The superconducting magnet debugging tool (1) is removed, and the second debugging section assembly (12) of the superconducting magnet debugging tool (1) is removed, the adaptive adjustment tool (3) is installed, and the removed second debugging section assembly (12) is reinstalled; The adaptive adjustment tool (3) applies tension to the load belt (21) to overcome the beam deflection of the superconducting coil in the X-axis direction due to gravity.

13. The method of claim 12, wherein, The adaptive adjustment tool (3) applies tension to the load belt (21) to overcome the beam deflection of the superconducting coil in the X-axis direction due to gravity. The Hall sensor (4) is used to detect the center position of the cryostat (2) and feed back the voltage value, and the magnetic field tester is used to detect the actual magnetic field of the superconducting magnet and feed back the 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 the predetermined threshold value, 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 less than the predetermined threshold value.

14. The method of claim 12, wherein, Also includes: The test instrument is installed at the isocenter of the treatment room, and the test instrument receives the beam emitted by the cyclotron, and the test instrument compares the position of the received beam with the predetermined center point of the test instrument to obtain the deflection of the beam in the X-axis direction and the Y-axis direction, if the deflection of the beam in the X-axis direction and / or the Y-axis direction exceeds the deflection threshold, the superconducting magnet debugging tool (1) is used to adjust the deflection of the superconducting coil in the Y-axis direction, and / or the adaptive adjustment tool (3) is used to adjust the deflection of the superconducting coil in the X-axis direction, wherein the X-axis direction intersects the Y-axis direction.

15. The method of claim 12, wherein the magnetic field is applied in a direction that is substantially parallel to the axis of the superconducting magnet. The superconducting magnet debugging tool (1) is connected to the load belt (21) of the cryostat (2), and the position of the superconducting coil is preliminarily adjusted. The superconducting magnet debugging tool (1) includes a pointer (1223) and a scale disc (1222), the superconducting magnet debugging tool (1) is connected to the load belt (21), when the further movement of the superconducting magnet debugging tool (1) is resisted by the resistance provided by the load belt (21), the scale indicated by the recording pointer (1223) is recorded as an initial reading, which is used to indicate the adjustment amount of the superconducting magnet debugging tool (1).

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