Escaping fast ion diagnostics in compact helical system heliotron/torsatron
Escaping fast ion diagnostics in compact helical system heliotron/torsatron
复制标题
在紧凑型螺旋系统日光管/托萨管中逃避快离子诊断
DOI：
10.1063/1.1149404
复制
发表时间：
1999
影响因子：
1.6
通讯作者：
K. Matsuoka
中科院分区：
文献类型：
--
作者：
M. Isobe;D. Darrow;T. Kondo;M. Sasao;K. Toi;M. Osakabe;H. Shimizu;Y. Yoshimura;C. Takahashi;S. Murakami;S. Okamura;K. Matsuoka
用基于闪烁体的探头测量了逃逸的高能离子，该探头可以提供紧凑螺旋系统中被探测离子的俯仰角和回转半径信息。这项测量始于1997年2月。证实了输出信号是由中性束注入的快离子产生的。开发了Lorentz轨道程序，计算了到达探测器的快离子轨道，以了解被探测离子的损失过程。用蒙特卡罗束流沉积程序HFREYA计算了快离子的出生地和初始俯仰角。从计算的快离子轨道的俯仰角变化与诞生快离子的俯仰角分布的比较中可以看出，诞生在核心区的快离子不能直接到达检测点。
Escaping energetic ions have been measured with a scintillator-based probe which can provide both information of pitch angle and gyroradius of detected ions in compact helical system. The measurement was started in February 1997. It was confirmed that output signals are due to neutral beam-injected fast ions. A Lorentz orbit code was developed and fast ion orbits reaching the probe were computed to understand the loss process of detected ions. Birthplace and initial pitch angle of fast ions were calculated by a Monte Carlo beam deposition code HFREYA. From the comparison between pitch angle variation of computed fast ion orbits and pitch angle distribution of birth fast ions, it turns out that fast ions whose birthplace is in the core region cannot reach the detection point directly.