Development of a compact electron-cyclotron-resonance ion source for high-energy carbon-ion therapy
Development of a compact electron-cyclotron-resonance ion source for high-energy carbon-ion therapy
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开发用于高能碳离子治疗的紧凑型电子回旋共振离子源
DOI：
10.1063/1.2132267
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发表时间：
2005
影响因子：
1.6
通讯作者：
A. Drentje
中科院分区：
文献类型：
--
作者：
M. Muramatsu;A. Kitagawa;Y. Sakamoto;S. Sato;Y. Sato;H. Ogawa;S. Yamada;H. Ogawa;Y. Yoshida;A. Drentje
用于医疗设施的离子源应具有易于维护、耗电量低、稳定性好、运行时间长（一年或更长）等特点。为此，研制了一台10 GHz全永磁电子回旋共振离子源（Kei 2源）。在束轴上的最大镜像磁场在引出侧为0.59 T，在气体注入侧为0.87 T，而最小B强度为0.25 T。这些参数已被优化的基础上的经验，在10 GHz的NIRS-ECR离子源和以前的原型紧凑型源（Kei源）的C4+的生产。Kei 2源的直径为320毫米，长度为295毫米。在40 kV的引出电压下，C4+的束流强度为530μA。在C4+电流为280μA时，在90小时内，不调整操作参数，束流稳定性优于6%。本文详细介绍了该源的设计和束流试验。
Ion sources for medical facilities should have characteristics of easy maintenance, low electric power consumption, good stability, and long operation time without problems (one year or longer). For this, a 10GHz compact electron-cyclotron-resonance ion source with all-permanent magnets (Kei2 source) was developed. The maximum mirror magnetic fields on the beam axis are 0.59T at the extraction side and 0.87T at the gas-injection side, while the minimum B strength is 0.25T. These parameters have been optimized for the production of C4+ based on the experience at the 10GHz NIRS-ECR ion source and a previous prototype compact source (Kei source). The Kei2 source has a diameter of 320mm and a length of 295mm. The beam intensity of C4+ was obtained to be 530μA under an extraction voltage of 40kV. The beam stability was better than 6% at C4+ of 280μA during 90h with no adjustment of the operation parameters. The details of the design and beam tests of the source are described in this paper.