Performance of a compact injector for heavy-ion medical accelerators
Performance of a compact injector for heavy-ion medical accelerators
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DOI：
10.1016/j.nima.2007.01.012
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发表时间：
2007-03
影响因子：
1.4
通讯作者：
Y. Iwata;S. Yamada;T. Murakami;T. Fujimoto;T. Fujisawa;H. Ogawa;N. Miyahara;K. Yamamoto;S. Hojo;Y. Sakamoto;M. Muramatsu;T. Takeuchi;T. Mitsumoto;H. Tsutsui;T. Watanabe;T. Ueda
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文献类型：
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作者：
Y. Iwata;S. Yamada;T. Murakami;T. Fujimoto;T. Fujisawa;H. Ogawa;N. Miyahara;K. Yamamoto;S. Hojo;Y. Sakamoto;M. Muramatsu;T. Takeuchi;T. Mitsumoto;H. Tsutsui;T. Watanabe;T. Ueda
建造了专为重离子医疗加速器综合体设计的紧凑型注射器。它由一个电子回旋共振离子源（ECRIS）和两个直线加速器组成，即射频四极直线加速器和叉指H模式漂移管直线加速器（IH-DTL），其工作频率相同为200MHz。对于 IH-DTL 的光束聚焦，采用了交替相位聚焦（APF）方法。紧凑型注入器可将荷质比为 qm=13 的重离子加速至 4.0MeV/u。使用 APF IH-DTL 和 200MHz 的工作频率使我们能够设计紧凑的直线加速器；两台直线加速器的总长度小于6m。对紧凑型喷射器系统进行了束加速测试。使用紧凑型注射器测得的加速 C4+12 光束强度为 380eμA。 APF IH-DTL 的光束传输率估计高达 96%，与仿真代码计算的值相当。测量了加速光束的横向相空间和能量分布，并将其与仿真代码计算的结果进行比较，发现它们非常吻合。
A compact injector, designed for a heavy-ion medical accelerator complex, was constructed. It consists of an Electron-Cyclotron-Resonance Ion-Source (ECRIS) and two linacs, which are a Radio-Frequency-Quadrupole linac and an Interdigital H-mode Drift-Tube-Linac (IH-DTL) having the same operating frequency of 200MHz. For beam focusing of the IH-DTL, the method of Alternating-Phase-Focusing (APF) was employed. The compact injector can accelerate heavy ions having a charge-to-mass ratio of qm=13 up to 4.0MeV/u. Use of the APF IH-DTL and operating frequency of 200MHz allowed us to design compact linacs; the total length of the two linacs is less than 6m. Beam-acceleration tests of the compact injector system were performed. The measured intensity of accelerated C4+12 beams with the compact injector was 380eμA. Beam transmission of the APF IH-DTL was estimated to be as high as 96%, which is comparable to the value calculated by a simulation code. Transverse phase-space and energy distributions of accelerated beams were measured and compared with those calculated by the simulation code, and we found that they were agreed well with each other.