CN115397087A

CN115397087A - Coil adjusting device and cyclotron

Info

Publication number: CN115397087A
Application number: CN202211324833.4A
Authority: CN
Inventors: 卢禹; 张鑫; 陈根; 葛剑; 裴坤; 陈永华; 丁开忠
Original assignee: Hefei Cas Ion Medical and Technical Devices Co Ltd
Current assignee: Hefei Cas Ion Medical and Technical Devices Co Ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2022-11-25
Anticipated expiration: 2042-10-27
Also published as: CN115397087B

Abstract

The invention provides a coil adjusting device and a cyclotron. The coil adjusting device comprises a track, a sliding block assembly, a connecting rod, a driving assembly and a corrugated pipe. The slider assembly is slidably connected with the track for mounting the coil. The connecting rod is connected with the sliding block component. The driving component is connected with the connecting rod and used for driving the connecting rod to drive the sliding block component to move along the rail. The bellows is including vacuum side and the atmosphere side of carrying on the back mutually, and track, sliding block set spare and connecting rod are located the vacuum side, and drive assembly is located the atmosphere side, and the connecting rod is worn to establish the bellows and is connected with drive assembly. In the cyclotron and the coil adjusting device of the embodiment of the invention, the coil is arranged on the sliding block component which can move along the track, and the connecting rod can be driven by the driving component to move the sliding block component along the track so as to change the position of the coil arranged on the sliding block component.

Description

Coil adjusting device and circular accelerator

Technical Field

The invention relates to the technical field of accelerators, in particular to a coil adjusting device and a cyclotron.

Background

At present, the inside magnetic field control coil of common cyclotron often sets up in fixed position, surveys the debugging in-process at the restraint, if needs the adjustment coil position, then needs open the accelerator and carries out the dismouting, and the dismouting can make the inside vacuum environment of accelerator expose under the atmospheric environment, still need resume the vacuum environment in the accelerator after the dismouting again, and the operation is comparatively inconvenient.

Disclosure of Invention

The embodiment of the invention provides a coil adjusting device and a cyclotron.

The coil adjusting device provided by the embodiment of the invention comprises a track, a sliding block assembly, a connecting rod, a driving assembly and a corrugated pipe. The slider assembly is slidably connected with the track for mounting the coil. The connecting rod is connected with the sliding block component. The driving assembly is connected with the connecting rod and used for driving the connecting rod to drive the sliding block assembly to move along the track. The bellows includes vacuum side and the atmosphere side of back of the body mutually, the track the slider component reaches the connecting rod is located the vacuum side, drive assembly is located the atmosphere side, the connecting rod is worn to establish the bellows with drive assembly is connected.

In some embodiments, the rail includes a support and a bearing for carrying the slider assembly, the support being coupled to and for supporting the bearing.

In some embodiments, the carrier is curved along a direction of a particle beam of the cyclotron.

In some embodiments, the bearing component includes a body and a slide rail disposed on the body, the slider component includes a slider structure and a pulley structure, the slider structure is used for mounting the coil, and the pulley structure is connected with the slider structure and slidably engaged with the slide rail.

In some embodiments, the slider assembly includes a plurality of sliders, at least one of the sliders being connected to the connecting rod, and a connecting member for connecting two adjacent sliders.

In some embodiments, the slider includes a slider structure, a connecting structure, and a pulley structure, the slider structure is used for mounting the coil, the connecting structure is disposed on the slider structure, the pulley structure is connected with the slider structure and is engaged with the rail, and the connecting member is used for connecting the connecting structures of two adjacent sliders.

In some embodiments, the coil adjusting device further comprises a mounting member, the mounting member comprises a connecting portion and a mounting portion, the connecting portion is connected with the slider assembly, and the coil is wound on the mounting portion.

In some embodiments, the coil adjusting device further comprises a control circuit, the coil is electrically connected with the control circuit, and the control circuit is used for switching the current direction of the coil.

The embodiment of the invention provides a cyclotron which comprises a coil, a shell and a coil adjusting device. The coil adjusting device comprises a track, a sliding block assembly, a connecting rod, a driving assembly and a corrugated pipe. The slider assembly is slidably coupled to the track for mounting the coil. The connecting rod is connected with the sliding block component. The driving assembly is connected with the connecting rod and used for driving the connecting rod to drive the sliding block assembly to move along the track. The bellows includes vacuum side and the atmosphere side of back of the body mutually, the track the slider component reaches the connecting rod is located the vacuum side, drive assembly is located the atmosphere side, the connecting rod is worn to establish the bellows with drive assembly is connected. The coil, the track, the sliding block assembly and the connecting rod are arranged in the shell, and the driving assembly is arranged outside the shell.

In some embodiments, the cyclotron includes at least one coil set, each of the coil sets includes 4 of the coils, the cyclotron further includes a plurality of control circuits, each coil set is electrically connected to one of the control circuits, the control circuits include relays electrically connected to the coils, the relays being configured to switch an on state and an off state to adjust a field strength direction of a magnetic field generated by the coil set.

In the cyclotron and the coil adjusting device of the embodiment of the invention, the coil is arranged on the sliding block component which can move along the track, and the connecting rod can be driven by the driving component to move the sliding block component along the track so as to change the position of the coil arranged on the sliding block component. Therefore, under the condition that the position of the coil needs to be adjusted, the coil does not need to be disassembled again by opening the cyclotron, and only the driving component is controlled to drive the connecting rod to move the sliding component to the corresponding position along the track, so that the operation is convenient.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic perspective view of a coil adjustment device according to certain embodiments of the present invention;

FIG. 2 is a schematic diagram of the construction of a cyclotron in accordance with certain embodiments of the invention;

FIG. 3 is an enlarged schematic view of region I of FIG. 1;

FIG. 4 is a schematic diagram of the trajectory of a particle beam;

FIG. 5 is a schematic perspective view of a mount according to certain embodiments of the invention;

FIG. 6 is a schematic view of the magnetic field directions of the coils of some embodiments of the present invention;

FIG. 7 is a schematic diagram of a conditioning circuit according to some embodiments of the invention;

fig. 8 is a schematic view of the magnetic field direction of the coil of some embodiments of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "thickness," "upper," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings only for the convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements.

Referring to fig. 1 and 2, a cyclotron 1000 and a coil adjusting device 100 are provided according to an embodiment of the present invention. The cyclotron 1000 comprises a coil 200 and a coil adjustment device 100 is used to adjust the position of the coil 200 in the cyclotron 1000. The coil adjusting apparatus 100 includes a rail 10, a slider assembly 20, a connecting rod 30, a driving assembly 40, and a bellows 50. Wherein the slider assembly 20 is slidably coupled with the rail 10 for mounting the coil 200. The connecting rod 30 is connected to the slider assembly 20. A drive assembly 40 is coupled to the connecting rod 30, the drive assembly 40 being configured to drive the connecting rod 30 to move the slider assembly 20 along the track 10. The bellows 50 includes vacuum side and atmosphere side that back to back, and track 10, slider assembly 20 and connecting rod 30 are located the vacuum side, and drive assembly 40 is located the atmosphere side, and the connecting rod 30 wears to establish bellows 50 and is connected with drive assembly 40.

A fixed voltage applied within the cyclotron 1000 can produce a fixed magnetic field of fixed field strength for accelerating the particle beam. Under the condition that the coil 200 is supplied with current with preset intensity, the coil 200 generates a magnetic field, and under the condition that the fixed magnetic field has errors, the magnetic field generated by the coil 200 can compensate the fixed magnetic field, so that the total magnetic field acting on the particle beam current meets the application requirement. In an application scenario of tuning the particle beam of the cyclotron 1000, the position of the coil 200 may need to be adjusted multiple times to change the position of the compensation magnetic field generated by the coil 200, which acts on the particle beam, so as to obtain accelerated particle beams with various attributes until the particle beam meeting the application requirements can be obtained.

The coil of the traditional cyclotron is often installed at a fixed position of the cyclotron, the cyclotron and the coil need to be disassembled and assembled again when the position of the coil is adjusted every time, and the adjusting process is very complicated. In the cyclotron 1000 and the coil adjusting apparatus 100 according to the embodiment of the present invention, the coil 200 is mounted to the slider assembly 20 movable along the rail 10, and the link 30 is driven by the driving assembly 40 to move the slider assembly 20 along the rail 10, so as to change the position of the coil 200 mounted to the slider assembly 20. In this way, when the position of the coil 200 needs to be adjusted, the coil 200 does not need to be disassembled again by opening the cyclotron 1000, and only the driving assembly 40 needs to be controlled to drive the connecting rod 30 to move the sliding assembly to the corresponding position along the track 10, so that the operation is convenient.

The cyclotron 1000 and the coil adjustment device 100 are further described with reference to the drawings.

Referring to fig. 1 and 2, in some embodiments, the cyclotron 1000 includes a housing 300, a coil 200, a rail 10, a slider assembly 20, and a connecting rod 30 disposed in the housing 300, and a driving assembly 40 disposed outside the housing 300. In one embodiment, the bellows 50 is provided with a joint connected to the housing 300 for sealing the connection of the bellows 50 to the housing 300. One side of the connector connected to the housing 300 is a vacuum side, and the other side opposite to the vacuum side is an atmosphere side. When the position of the coil 200 is adjusted, the sealing structure of the cyclotron 1000 does not need to be disassembled, and the driving assembly 40 is controlled on the atmosphere side to drive the connecting rod 30 to move.

Referring to fig. 1 and 2, in some embodiments, the driving assembly 40 includes a motor, and an output shaft of the motor is connected to the connecting rod 30. In one embodiment, the motor is a stepping motor, and the corresponding relationship between the step change amount of the stepping motor and the change amount of the distance moved by the connecting rod 30 is easily measured, so that the step of the stepping motor can be precisely controlled to move a preset step length, so that the connecting rod 30 drives the slider assembly 20 to move a preset distance along the track 10, and the position of the coil 200 can be accurately adjusted.

Referring to fig. 3, in some embodiments, the rail 10 includes a supporting member 11 and a bearing member 12, the bearing member 12 is used for bearing the slider assembly 20, and the supporting member 11 is connected to the bearing member 12 and is used for supporting the bearing member 12. In one embodiment, the height of the support 11 in the vertical direction is adjustable to enable the height of the carriage 12 and the slider assembly 20 in the vertical direction to be changed and the height of the coil 200 in the vertical direction to be adjusted.

Referring to fig. 4, fig. 4 is a schematic top view of a moving trajectory of a particle beam in the cyclotron 1000. In some embodiments, the carrier 12 is curved in the direction of the particle beam of the cyclotron 1000. As shown in fig. 4, the moving trajectory of the particle beam is a plurality of semi-circles with different radii (e.g., radius r 1). Referring to fig. 3, the curved shape of the supporting member 12 corresponds to a semi-arc corresponding to the particle beam moving trajectory, so that the slider assembly 20 drives the coil 200 to move to positions corresponding to different radii of the particle beam trajectory, and the coil 200 compensates for the field strength at the position corresponding to the particle beam radius.

Referring to fig. 3, in some embodiments, the supporting member 12 includes a body 121 and a sliding rail 122 disposed on the body 121, the sliding block assembly 20 includes a sliding block structure 211 and a pulley structure 212, the sliding block structure 211 is used for mounting the coil 200, and the pulley structure 212 is connected to the sliding block structure 211 and slidably engaged with the sliding rail 122. In one embodiment, the pulley structure 212 is a unitary structure with the slider structure 211; in another embodiment, the pulley structure 212 is fixedly connected with the sliding block structure 211 by welding, gluing, or the like; in another embodiment, the pulley structure 212 and the slider structure 211 are detachably connected by screws, snaps, and the like, without limitation.

In one embodiment, the pulley structure 212 includes two sets of wheels 2121 side by side, each set of wheels 2121 includes two pulleys, and the two pulleys of each set of wheels 2121 are slidably engaged with the slide rail 122 on the left and right sides of the slide rail 122 respectively. In this way, the pulley structure 212 can ensure that the pulley structure 212 stably moves along the slide rail 122 by the two sets of wheel bodies 2121 sliding-fitting with the slide rail 122.

Referring to fig. 3, in some embodiments, the sliding block assembly 20 includes a plurality of sliding blocks 21 and connecting members 22, at least one sliding block 21 is connected to the connecting rod 30, and the connecting member 22 is used for connecting two adjacent sliding blocks 21. In this way, the plurality of sliding blocks 21 are connected end to end through the connecting members 22, and the connecting rod 30 can drive each sliding block 21 to move along the track 10 simultaneously.

In one embodiment, each slider 21 includes a slider structure 211, a connecting structure 213, and a pulley structure 212. The connecting member 22 is used to connect the connecting structures 213 of two adjacent sliders 21. In one embodiment, the connecting structure 213 extends from the front and rear sides of the slider structure 211, and the two pulleys of each wheel 2121 of the pulley structure 212 are respectively located at the left and right sides of the slider structure 211. The connecting structure 213 of the slider 21 closest to the link 30 is connected to the link 30.

At least one of the plurality of sliders 21 of the slider assembly 20 is mounted with the coil 200. For example, only 1 slider 21 is mounted with the coil 200; or 2, 3, 4 or more sliders 21 are mounted with the coil 200, which is not limited herein.

Referring to fig. 3 and 5, in some embodiments, the coil adjusting apparatus 100 further includes a mounting member 60, the mounting member 60 includes a connecting portion 62 and a mounting portion 61, the connecting portion 62 is connected to the slider assembly 20, and the coil 200 is mounted to the mounting portion 61. In some embodiments, the mounting portion 61 is provided with a plurality of openings, with different openings corresponding to different initial mounting angles of the coil 200. In some embodiments, the coil adjustment device 100 includes at least one mounting member 60, and at least one of the plurality of sliders 21 of the slider assembly 20 is coupled to the mounting member 60. For example, only 1 slider 21 is connected to the mount 60; or 2, 3, 4 or more sliders 21 may be connected to the mounting member 60, without limitation.

Referring to fig. 6, in some embodiments, the cyclotron 1000 includes at least one coil set, each coil set including 4 coils 200. Referring to fig. 2, the coil adjusting apparatus 100 further includes a control circuit 80, and each coil set is electrically connected to one control circuit 80. The control circuit 80 is used to power the coil assembly so that the energized coil 200 produces a magnetic field.

In some embodiments, two coils 200 are respectively disposed on one side of the radius of the particle beam trajectory in the first direction (Y1 direction, the same below) and the other side in the second direction (Y2 direction, the same below). The coils 200 on different sides are symmetrical about this radius. In some embodiments, the currents of each coil 200 are equal, such that the field strengths of the magnetic fields generated by each coil 200 are relative, facilitating calculation of the field strength of the vector superposition.

For example, in the embodiment illustrated in fig. 6, the coils 200 (Q1) and 200 (Q2) are provided on one side of the particle beam trajectory radius r1 in the first direction, and the coils 200 (Q3) and 200 (Q4) are provided on one side in the second direction. Wherein the magnetic field direction of coils 200 (Q1) and 200 (Q3) is in a first direction, the magnetic field direction of coils 200 (Q2) and 200 (Q4) is in a second direction, and the first direction and the second direction are opposite.

Referring to fig. 7, in some embodiments, the control circuit 80 includes a power source 81 and a plurality of relays 82. The power supply 81 is used to supply power to the coil 200. The relays 82 are electrically connected to the power source 81 and the coils 200, respectively, and the plurality of relays 82 can switch on and off states to change the direction of the current of the coils 200 to change the direction of the field intensity of the magnetic field generated by the coils 200, thereby changing the direction of the total field intensity of the coil group.

For example, in the embodiment illustrated in fig. 6, the directions of the currents of the coils 200 (Q2) and 200 (Q4) are reversed by adjusting the on and off states of the plurality of relays 82, and the directions of the magnetic fields of the coils 200 (Q2) and 200 (Q4) after adjustment are in the first direction, as shown in fig. 8.

In summary, in the cyclotron 1000 and the coil adjusting apparatus 100 of the present invention, the coil 200 is mounted on the slider assembly 20 that is movable along the rail 10, and the connecting rod 30 is driven by the driving assembly 40 to move the slider assembly 20 along the rail 10, so as to change the position of the coil 200 mounted on the slider assembly 20, and change the magnitude of the field intensity of the coil 200 acting on the particle beam. By switching the on and off states of relay 82 in control circuit 80, the direction of the current in coil 200 can be changed to adjust the direction of the magnetic field applied to the particle beam by coil 200. In this way, the direction and magnitude of the magnetic field generated by the coil 200 can be adjusted without detaching the cyclotron 1000, and the tuning of the particle beam can be facilitated.

In the description herein, references to the description of "certain embodiments," "one example," "exemplary," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention.

Claims

1. A coil adjustment device, wherein the coil is for a cyclotron, the coil adjustment device comprising:

a track;

a slider assembly slidably connected with the track for mounting the coil;

the connecting rod is connected with the sliding block assembly;

the driving assembly is connected with the connecting rod and used for driving the connecting rod to drive the sliding block assembly to move along the track; and

the bellows, including vacuum side and the atmosphere side of carrying on the back mutually, the track the slider component reaches the connecting rod is located the vacuum side, drive assembly is located the atmosphere side, the connecting rod is worn to establish the bellows with drive assembly is connected.

2. The coil adjustment device of claim 1, wherein the rail comprises a support and a carrier, the carrier being configured to carry the slider assembly, the support being coupled to the carrier and configured to support the carrier.

3. The coil adjustment device according to claim 2, wherein the carrier is curved in a particle beam direction of the cyclotron.

4. The coil adjusting device of claim 2, wherein the bearing member comprises a body and a slide rail disposed on the body, the slider assembly comprises a slider structure and a pulley structure, the slider structure is used for mounting the coil, and the pulley structure is connected with the slider structure and is in sliding fit with the slide rail.

5. The coil adjustment device of claim 1, wherein the slider assembly comprises a plurality of sliders and a connecting member, at least one of the sliders being connected to the connecting rod, the connecting member being used to connect two adjacent sliders.

6. The coil adjusting device according to claim 5, wherein the slider comprises a slider structure, a connecting structure and a pulley structure, the slider structure is used for mounting the coil, the connecting structure is arranged on the slider structure, the pulley structure is connected with the slider structure and is matched with the track, and the connecting member is used for connecting the connecting structures of two adjacent sliders.

7. The coil adjustment device of claim 1, further comprising a mounting member, the mounting member comprising a connecting portion and a mounting portion, the connecting portion being connected to the slider assembly, the coil being wound around the mounting portion.

8. The coil adjustment device of claim 1, further comprising a control circuit, the coil being electrically connected to the control circuit, the control circuit being configured to switch a direction of current flow through the coil.

9. A cyclotron, comprising:

a coil;

a housing; and

the coil adjustment device of any one of claims 1-7, wherein the coil, the track, the slider assembly, and the linkage are disposed within the housing, and the drive assembly is disposed outside the housing.

10. The cyclotron of claim 9, wherein the cyclotron includes at least one coil set, each of the coil sets including 4 of the coils, the cyclotron further including a plurality of control circuits, each of the coil sets being electrically connected to one of the control circuits, the control circuits including relays electrically connected to the coils, the relays being configured to switch the on-state and the off-state to adjust a field strength direction of a magnetic field generated by the coil set.