Synchrotron injection and extraction electrostatic deflector for proton helium ion therapy

Abstract

The utility model relates to an injection and extraction static deflector for a proton helium ion therapy synchrotron, which comprises a cutting plate, a cathode, a first support plate, a second support plate and a vacuum cylinder, the first support plate and the second support plate are positioned on the same plane, the cutting plate is movably mounted in the vacuum cylinder through the first support plate, and the cathode is arranged in the vacuum cylinder. The cathode is a titanium electrode and is movably installed in the vacuum cylinder through a second supporting plate. According to the injection and extraction electrostatic deflector for the proton helium ion treatment synchrotron, the positions and deflection angles of the deflector can be respectively adjusted as required through the first supporting plate and the second supporting plate which can be independently adjusted, the cutting plate and the cathode; therefore, different precession distances, field intensities and deflection angles required by proton and helium ion injection and extraction are realized.

Description

Technical Field

[0001] The utility model relates to a synchrotron accelerator, and more specifically to an injection-extraction electrostatic deflector for a proton-helium ion therapy synchrotron accelerator. Background Art

[0002] The injection and extraction of particle beams in proton helium ion radiotherapy synchrotron accelerators are accomplished by electrostatic deflectors in conjunction with other components.

[0003] The electrostatic deflector includes a cutting plate mounted by a fixing mechanism (C-frame), and an electric field-free channel is provided between the cutting plate and the C-frame for the circulating beam to pass undisturbed, ensuring that the beam maintains its trajectory without deflection while circulating in the accelerator.

[0004] The electrostatic deflector generates high voltage between the cutting plate and the high voltage electrode (cathode) to provide a static electric field for beam deflection, that is, a high voltage channel is provided between the cutting plate and the cathode, and the injected or extracted beam passes through the high voltage channel, and the electric field provides the required deflection angle. The high voltage channel is actually two parallel electrode plates in a vacuum, one electrode is connected to a negative high voltage (i.e., the cathode), and the other electrode is a cutting plate with a zero potential.

[0005] In order to optimize the efficiency of injection and extraction, the electric field strength of the electrostatic deflector, the position and angle of the cutting plate need to be adjusted. The prior art lacks a mechanism that can adjust the switching of protons and helium ions. Utility Model Content

[0006] In order to solve the problems in the above-mentioned prior art that the switching between two ions cannot be adjusted, the utility model provides an electrostatic deflector for proton helium ion therapy synchrotron injection extraction.

[0007] According to the utility model, an electrostatic deflector for proton helium ion therapy synchrotron injection extraction comprises a cutting plate, a cathode, a first support plate, a second support plate and a vacuum cylinder, wherein the first support plate and the second support plate are located on the same plane, the cutting plate is movably mounted in the vacuum cylinder via the first support plate, and the cathode is a titanium pole and is movably mounted in the vacuum cylinder via the second support plate.

[0008] Preferably, the cutting board is composed of a plurality of cutting board strips arranged side by side, the edges of adjacent cutting board strips being mounted close to each other and all the cutting board strips being in the same plane.

[0009] Preferably, the electrostatic deflector for proton helium ion therapy synchrotron injection extraction further comprises a frame, which is fixedly mounted on the first supporting plate, and the cutting plate is fixedly mounted on the frame.

[0010] Preferably, the frame is a C-shaped frame.

[0011] Preferably, the electrostatic deflector for proton and helium ion therapy synchrotron injection and extraction further includes a first driving mechanism, which is connected to the first support plate to drive the movement of the first support plate, thereby driving the cutting plate.

[0012] Preferably, the first driving mechanism includes two linear motion vacuum feedthroughs, which extend into the vacuum cylinder from the outside and are connected to the side of the first support plate away from the second support plate, for feeding linear motion from the external atmospheric environment into the vacuum environment, and then driving the first support plate to translate and rotate.

[0013] Preferably, the electrostatic deflector for proton and helium ion therapy synchrotron injection and extraction further includes a support column, which is fixedly installed on the second support plate, and the cathode is fixedly installed on the support column.

[0014] Preferably, the electrostatic deflector for proton and helium ion therapy synchrotron injection and extraction further includes a second driving mechanism, which is connected to the second support plate to drive the movement of the second support plate, thereby driving the cathode.

[0015] Preferably, the second driving mechanism includes two linear motion vacuum feedthroughs, which extend into the vacuum cylinder from the outside and are connected to the side of the second support plate away from the first support plate, for feeding linear motion from the external atmospheric environment into the vacuum environment, and then driving the second support plate to translate and rotate.

[0016] Preferably, the vacuum cylinder is a vacuum steel cylinder.

[0017] According to the electrostatic deflector for proton and helium ion therapy synchrotron injection and extraction of the present invention, through the independently adjustable first support plate and second support plate, the cutting plate and the cathode can respectively adjust their positions and deflection angles as needed, so as to achieve different precession distances, field strengths and deflection angles required for proton and helium ion injection and extraction. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of an electrostatic deflector for proton and helium ion therapy synchrotron injection and extraction according to a preferred embodiment of the present invention. Detailed Embodiment

[0019] The following combines the drawings to give a preferred embodiment of the present invention and describes it in detail.

[0020] As Figure 1As shown, according to a preferred embodiment of the utility model, an electrostatic deflector for proton helium ion therapy synchrotron injection extraction includes a cutting plate 11, a cathode 12, a first support plate 21, a second support plate 22 and a vacuum cylinder 30, wherein the first support plate 21 and the second support plate 22 are located on the same plane, the cutting plate 11 is movably mounted in the vacuum cylinder 30 through the first support plate 21, and the cathode 12 is movably mounted in the vacuum cylinder 30 through the second support plate 22. In the vacuum cylinder 30, a part of the beam enters the high-voltage channel between the cutting plate 11 and the cathode 12, and is deflected relative to the original direction of movement by the force of the electric field, thereby realizing the injection or extraction of the beam. Through the independently adjustable first support plate 21 and the second support plate 22, the cutting plate 11 and the cathode 12 can adjust their positions and deflection angles respectively as needed, thereby realizing different precession distances, field strengths and deflection angles required for proton and helium ion injection extraction, that is, adjusting the precession distance, deflection angle and required electric field strength according to different ions switched.

[0021] In this embodiment, the cutting plate 11 is composed of a plurality of cutting plate strips arranged side by side, the edges of adjacent cutting plate strips are installed close to each other, and all the cutting plate strips are in the same plane. In addition, the cutting plate 11 is set to be as thin as possible to reduce beam loss as much as possible.

[0022] In this embodiment, the electrostatic deflector for proton helium ion therapy synchrotron injection extraction further includes a frame 41, which is fixedly mounted on the first support plate 21, and the cutting plate 11 is fixedly mounted on the frame 41. In the vacuum cylinder 30, a portion of the beam enters the field-free channel between the cutting plate 11 and the frame 41, and circulates along the original direction of movement without deflection.

[0023] In this embodiment, the frame 41 is a C-shaped frame.

[0024] In this embodiment, the cutting board strips of the cutting board 11 are mounted and fixed on the frame 41 by a tensioning mechanism.

[0025] In this embodiment, the electrostatic deflector for proton helium ion therapy synchrotron injection extraction further includes a first driving mechanism 51 , which is connected to the first support plate 21 to drive the movement of the first support plate 21 , thereby driving the cutting plate 11 .

[0026] In this embodiment, the first driving mechanism 51 includes two linear motion vacuum feeders which extend into the vacuum cylinder 30 from the outside and are connected to the left side surface of the first support plate 21, and are used for feeding linear motion from the external atmospheric environment into the vacuum environment, so as to drive the first support plate 21 to translate and rotate. The motion directions of the two linear motion vacuum feeders are in the same plane. When the motion directions and strokes of the two linear motion vacuum feeders are exactly the same, the translation of the first support plate 21 can be realized, and then the cutting plate 11 is driven to translate. When the motion directions or strokes of the two linear motion vacuum feeders are different, the rotation of the first support plate 21 can be realized, and then the cutting plate 11 is driven to rotate.

[0027] In this embodiment, the cathode 12 is a titanium electrode. Compared with a stainless steel cathode, the titanium electrode has an improved voltage withstand level, meeting the requirements of helium ion implantation extraction, so that the electrostatic deflector for proton-helium ion therapy synchrotron injection and extraction can have an increased electric field strength.

[0028] In this embodiment, the electrostatic deflector for proton-helium ion therapy synchrotron injection and extraction further includes a support column 42 which is fixedly installed on the second support plate 22, and the cathode 12 is fixedly installed on the support column 42.

[0029] In this embodiment, the electrostatic deflector for proton-helium ion therapy synchrotron injection and extraction further includes a second driving mechanism 52 which is connected to the second support plate 22 to drive the movement of the second support plate 22, so as to drive the cathode 12.

[0030] In this embodiment, the second driving mechanism 52 includes two linear motion vacuum feeders which extend into the vacuum cylinder 30 from the outside and are connected to the right side surface of the second support plate 22, and are used for feeding linear motion from the external atmospheric environment into the vacuum environment, so as to drive the second support plate 22 to translate and rotate. The motion directions of the two linear motion vacuum feeders are in the same plane. When the motion directions and strokes of the two linear motion vacuum feeders are exactly the same, the translation of the second support plate 22 can be realized, and then the cathode 12 is driven to translate. When the motion directions or strokes of the two linear motion vacuum feeders are different, the rotation of the second support plate 22 can be realized, and then the cathode 12 is driven to rotate.

[0031] In this embodiment, the vacuum cylinder 30 is a vacuum steel cylinder.

[0032] The above-mentioned are only the preferred embodiments of the present invention, and are not used to limit the scope of the present invention. Various changes can be made to the above embodiments of the present invention. That is, all simple, equivalent changes and modifications made according to the claims and the content of the specification of the present invention application shall fall within the scope of the claims of the present invention patent. Those not described in detail in the present invention are all conventional technical contents.

Claims

1. A synchrotron injection and extraction electrostatic deflector for proton and helium ion therapy, characterized in that, The electrostatic deflector for proton helium ion therapy synchrotron injection extraction comprises a cutting plate, a cathode, a first support plate, a second support plate and a vacuum cylinder, wherein the first support plate and the second support plate are located on the same plane, the cutting plate is movably mounted in the vacuum cylinder via the first support plate, and the cathode is a titanium pole and is movably mounted in the vacuum cylinder via the second support plate.

2. The electrostatic deflector for proton-helium ion therapy synchrotron injection and extraction according to claim 1, wherein The cutting board is composed of a plurality of cutting board strips arranged side by side, the edges of adjacent cutting board strips are installed close to each other, and all the cutting board strips are in the same plane.

3. The electrostatic deflector for proton and helium ion therapy synchrotron injection and extraction according to claim 1, characterized in that, The electrostatic deflector for proton helium ion therapy synchrotron injection extraction also includes a frame, which is fixedly mounted on the first supporting plate, and the cutting plate is fixedly mounted on the frame.

4. The electrostatic deflector for proton and helium ion therapy synchrotron injection and extraction according to claim 3, characterized in that, The frame is a C-frame.

5. The electrostatic deflector for proton-helium ion therapy synchrotron injection and extraction according to claim 1, characterized in that, The electrostatic deflector for proton helium ion therapy synchrotron injection extraction also includes a first driving mechanism, which is connected to the first supporting plate to drive the movement of the first supporting plate, thereby driving the cutting plate.

6. The electrostatic deflector for proton-helium ion therapy synchrotron injection and extraction according to claim 5, characterized in that, The first driving mechanism includes two linear motion vacuum feed-in parts, which extend from the outside into the vacuum cylinder and are connected to the side of the first support plate away from the second support plate, and are used to feed linear motion from the external atmospheric environment into the vacuum environment, thereby driving the first support plate to translate and rotate.

7. The electrostatic deflector for proton-helium ion therapy synchrotron injection and extraction according to claim 1, characterized in that The electrostatic deflector for proton helium ion therapy synchrotron injection extraction also includes a support column, which is fixedly mounted on the second support plate, and the cathode is fixedly mounted on the support column.

8. The electrostatic deflector for proton-helium ion therapy synchrotron injection and extraction according to claim 1, characterized in that, The electrostatic deflector for proton helium ion therapy synchrotron injection extraction also includes a second driving mechanism, which is connected to the second supporting plate to drive the movement of the second supporting plate, thereby driving the cathode.

9. The electrostatic deflector for proton-helium ion therapy synchrotron injection and extraction according to claim 8, characterized in that, The second driving mechanism includes two linear motion vacuum feed-in parts, which extend from the outside into the vacuum cylinder and are connected to the side of the second support plate away from the first support plate, and are used to feed linear motion from the external atmospheric environment into the vacuum environment, thereby driving the second support plate to translate and rotate.

10. The electrostatic deflector for proton-helium ion therapy synchrotron injection and extraction according to claim 1, wherein The vacuum cylinder is a vacuum steel cylinder.

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