Development of a compact ECR ion source for various ion production.
Development of a compact ECR ion source for various ion production.
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开发用于各种离子产生的紧凑型 ECR 离子源。
DOI：
10.1063/1.4935221
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Atsushi Kitagawa
中科院分区：
文献类型：
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作者：
M. Muramatsu;S. Hojo;Yoshiyuki Iwata;K. Katagiri;Y. Sakamoto;Nobuaki Takahashi;N. Sasaki;K. Fukushima;K. Takahashi;T. Suzuki;T. Sasano;Takashi Uchida;Yoshikazu Yoshida;Shogo Hagino;T. Nishiokada;Y. Kato;Atsushi Kitagawa
期望碳离子放射治疗设施将产生用于基础研究的各种离子种类。虽然目前的Kei 2型离子源专用于碳离子生产，但预期未来的离子源可以提供：（1）用于医疗用途的碳离子生产，（2）用于现有直线加速器注入器的荷质比为1/3的各种离子，以及（3）用于修改的低成本。一个原型紧凑型电子回旋共振（ECR）离子源，命名为Kei 3，基于Kei系列已经开发出对应于Kei 2型，并在国立放射科学研究所（NIRS）产生这些不同的离子。Kei 3的外径为280 mm，长度为1120 mm。磁场由与Kei 2相同的永磁体形成。可移动的提取电极已被安装，以优化与各种电流密度的束流提取。真空室的气体注入侧有足够的空间用于烘箱系统。我们测量了微波频率，提取电压和拉晶位置的依赖性。还测量了氦、碳、氮、氧和氖的电荷态分布。
There is a desire that a carbon-ion radiotherapy facility will produce various ion species for fundamental research. Although the present Kei2-type ion sources are dedicated for the carbon-ion production, a future ion source is expected that could provide: (1) carbon-ion production for medical use, (2) various ions with a charge-to-mass ratio of 1/3 for the existing Linac injector, and (3) low cost for modification. A prototype compact electron cyclotron resonance (ECR) ion source, named Kei3, based on the Kei series has been developed to correspond to the Kei2 type and to produce these various ions at the National Institute of Radiological Sciences (NIRS). The Kei3 has an outer diameter of 280 mm and a length of 1120 mm. The magnetic field is formed by the same permanent magnet as Kei2. The movable extraction electrode has been installed in order to optimize the beam extraction with various current densities. The gas-injection side of the vacuum chamber has enough space for an oven system. We measured dependence of microwave frequency, extraction voltage, and puller position. Charge state distributions of helium, carbon, nitrogen, oxygen, and neon were also measured.