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Circular accelerator and particle beam therapy apparatus

A circular accelerator and treatment device technology, which is used in magnetic resonance accelerators, therapy, X-ray/γ-ray/particle irradiation therapy, etc., and can solve the problem that the circular accelerator itself becomes larger, cannot fully ensure the width, and cannot be stably emitted by the beam, etc. problem, to achieve the effect of maintaining compactness

Active Publication Date: 2015-06-10
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, when it is desired to emit a beam with a large beam size and low energy, it is not possible to sufficiently secure the space between the constituent devices in the circular accelerator and the beam (hereinafter referred to as clearance (clearance)), Unable to stabilize the harness
Therefore, in order to reduce the number of wires that disappear due to the configuration of the equipment (i.e., for stable emission), it is conceivable to increase the clearance, but the problem of increasing the size of the circular accelerator itself will newly arise.

Method used

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  • Circular accelerator and particle beam therapy apparatus
  • Circular accelerator and particle beam therapy apparatus
  • Circular accelerator and particle beam therapy apparatus

Examples

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Effect test

no. 1 Embodiment approach

[0022] figure 1 It is a schematic plan view showing a first embodiment of a heavy ion therapy system (heavy ion therapy system), which is an example of particle beam therapy systems such as heavy particles and protons.

[0023] like figure 1 As shown, the heavy ion radiotherapy apparatus of this embodiment roughly includes a circular accelerator 1 , a beam injection system 20 , and a beam delivery system 30 . The circular accelerator 1 of this embodiment is installed in a horizontal plane.

[0024] The circular accelerator 1 is provided with six deflection electromagnets 2, six quadrupole electromagnets 3, two hexapole electromagnets 4, two adjustment electromagnets 5 as incident trajectory adjustment electromagnets, an incident deflector 7, A deflector 8 for emission, a high-frequency acceleration device 9 and a control device 14 .

[0025] Six deflection electromagnets 2 deflect the incident charged particle beam to form a orbit of the charged particle beam. Six quadrupo...

no. 2 Embodiment approach

[0058] Figure 7 It is a schematic plan view showing the second embodiment of the particle beam therapy apparatus. In addition, the same code|symbol is attached|subjected to the same structure as said 1st Embodiment, and repeated description is abbreviate|omitted. The same applies to other embodiments.

[0059] like Figure 7 As shown, in the second embodiment, in addition to the arrangement structure in the above-mentioned first embodiment, in the swirling direction of the charged particle beam, before and after the exit deflector 8, at least two or more deflectors are arranged as the exit track adjustment Electromagnet 6 for adjustment with electromagnet. These adjustment electromagnets 6 are excited when the charged particle beam is emitted. As a result, the beam track is displaced at the position of the deflector 8 for emission, that is, an emission convex track for bringing the charged particle beam closer to and taking it out is formed on the outside.

[0060] Thus,...

no. 3 Embodiment approach

[0063] In the above-mentioned first and second embodiments, the cyclotron beams in the circular accelerator 1 have a distribution such that beams with higher energy than the center are displaced toward the outer periphery and beams with energy smaller than the center are displaced toward the inner periphery. By setting the variance function of the kinetic energy of the charged particle beam incident on the circular accelerator 1 to a positive value, the charged particle beam with high energy is incident on the outside of the closed orbit, and the charged particle beam with low energy is incident on the inside, so that the energy variation can be suppressed. The amplitude of the incident beam produced by the deviation.

[0064] In addition, when the charged particle beam is incident from the inside in a state where the variance function of the motion amount is zero, the variance function of the motion amount becomes a positive value. On the other hand, the variance function of ...

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Abstract

One embodiment of a particle circular accelerator 1 includes: a beam deflector (7) for beam injections, bending electromagnets (2) that causes the beam injected from the beam deflector (7) for beam injections to circulate so as to form a circulation orbit, orbit adjusting electromagnets for injected beams (5) that shift the position of each injected beam relative to the center of the circulation orbit of the beam, quadrupole electromagnets (3) and sextupole electromagnets (4) that adjust their respective quantities of magnetic excitation at the time of a beam extraction so as to extract a beam in a resonant region off a stable reason of beams and a beam deflector (8) for beam extractions that takes out the beam extracted from the resonant region to the outside. The circular accelerator (1) injects beams from the inner side thereof and emits beams to the outer side thereof.

Description

technical field [0001] The present invention relates to a circular accelerator and an ion therapy system using the same. Background technique [0002] In general, in a particle beam therapy apparatus that irradiates a high-energy beam (beam) obtained by accelerating charged particles to perform treatment, it is necessary to adjust the intracorporeal range of the irradiated beam according to the irradiation site and depth. [0003] In such a particle beam therapy apparatus, a circular accelerator is mainly used. In this circular accelerator, a variable energy (variable energy) irradiation method that adjusts the internal range of a radiation beam (irradiation beam) by changing the emitted beam energy (beam energy) can be considered. [0004] For example, after separation from a circulating beam is achieved by an emission device, another emission device with a larger deflection angle, such as a septum magnet, is used to deflect in the opposite direction. [0005] Another con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H13/04A61N5/10
CPCA61N5/1077A61N2005/1087A61N2005/1095H01J37/1472H01J37/3007H01J2237/04732H01J2237/152H01J2237/30472H05H7/08H05H7/10H05H13/04H05H2007/005H05H2007/087
Inventor 长内昭宏
Owner KK TOSHIBA
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