Method and device for accumulating beams in synchrotron for cancer therapy with heavy ions
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A synchrotron and heavy ion beam technology, which is applied in the field of beam accumulation, can solve the problems of low ion beam intensity and clinical treatment requirements, and achieve the effects of high-precision tumor scanning treatment, reduced beam loss, and reduced size
Active Publication Date: 2010-10-13
INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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[0005] The purpose of the present invention is to avoid the deficiencies of the prior art and provide a heavy ion cancer treatment synchrotron beam accumulation method and its device, which overcomes the low intensity of the ion beam provided by the cyclotron once and cannot meet the clinical treatment requirements defects, increase the number of stored ions, and make it applicable to clinical treatment
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Embodiment 1
[0029] Embodiment 1: A method for heavy ion cancer treatment synchrotron beam accumulation, including the following steps:
[0030] 1) inject the heavy ion beam provided by the injector into the synchrotron;
[0031] 2) In the electron cooling device, the electron gun produces a hollow electron beam with a larger edge density and a smaller center density, and uses the cathode potential to accelerate the electron beam to have the same average speed as the heavy ion beam;
[0032] 3) deflect the electron beam to a straight segment (cooling segment) on the synchrotron ring;
[0033] 4) Heavy ions pass through the cooling section and collide with electrons to cool the heavy ion beam;
[0034] 5) Deflect the electrons after the action, and enter the collector of the electron cooling device to collect, and the heavy ions continue to circulate in the synchrotron;
[0035] 6) The heavy ion beam repeatedly passes through the cooling section and is continuously cooled by the constantl...
Embodiment 2
[0046] Example 2: see figure 1 , figure 2 , image 3 , a device for beam accumulation of a synchrotron for treating cancer with heavy ions, wherein the device for accumulating beams of a synchrotron for treating cancer with heavy ions is sequentially provided with four-stage magnets 4a, 4b in the upstream of the linear section of the synchrotron , 4c, 4d, 4e, 4f, compensation helical tubes 2a, 2b, correcting magnets 3a, 3b, 3c, 3d are provided upstream and downstream of the compensation helical tubes 2a, 2b; downstream and upstream of the linear section of the synchrotron The same and corresponding settings; a beam cooling device is set in the middle of the linear section of the synchrotron. The beam cooling device is U-shaped, and an electron gun 5 is arranged at one end of the U-shaped mouth, and an electron beam passage 6 is arranged at the outlet of the electron gun 5, and the electron beam passage 6 is connected with the cooling device 1 provided on the U-shaped straig...
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Abstract
The invention mainly relates to a method and a device for accumulating beams and increasing ion numbers in a synchrotron for cancer therapy with heavy ion beams. The method comprises the following steps: 1. implanting the ion beams provided by an implanting device into the synchrotron; 2. in an electronic cooling device, generating electron beams with the same average velocity as the cooled ion beams; 3. deflecting the electron beams to a cooling section on the synchrotron; 4. enabling the ions to pass through the cooling section to collide with the electrons to act so as to cool the heavy ion beams; 5. deflecting the electrons after acting out. The invention also provides the device. Quadrupolar magnets and helix compensating tubes are sequentially arranged at the upper part of the straight section of the synchrotron; correcting magnets are arranged at the upper parts and lower parts of the helix compensating tubes; the arrangement at the lower part and the upper part of the straightsection of the synchrotron is the same and corresponding; a beam cooling device is arranged in the middle section of the straight section of the synchrotron. The invention has the advantages that theion numbers are obviously increased, the emittance and momentum spread of the ion beams are reduced, the beam quality is improved and the beam life is lengthened.
Description
Technical field: [0001] The invention mainly relates to a beam current accumulating method and device for increasing the number of heavy ions in a synchrotron for treating cancer with heavy ion beams. Background technique: [0002] Due to the characteristics of inverted depth dose distribution (Bragg peak), small side scattering, high relative biological effect (RBE) and low oxygen enhancement ratio (OER) in proton and heavy ion beam irradiation, protons, heavy ions Beam cancer treatment has become an advanced and effective cancer radiotherapy method in the world today. At present, only a few developed countries and my country have carried out corresponding research. The results of preliminary clinical treatment trials have shown that proton and heavy ion beams have very significant curative effects in cancer treatment, and there are no obvious toxic and side effects. [0003] A synchrotron that supplies heavy ion beams is the most basic device in carrying out heavy ion bea...
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Patent Type & Authority Patents(China)
IPC IPC(8): H05H13/04A61N5/10
Inventor 夏佳文原有进杨晓东冒立军
Owner INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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