A differential-spectrum ion-energy analyzer with electrostatic slanted grids
A differential-spectrum ion-energy analyzer with electrostatic slanted grids
复制标题
具有静电倾斜网格的差分谱离子能量分析仪
DOI：
10.1063/1.1146177
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发表时间：
1995
影响因子：
1.6
通讯作者：
S. Miyoshi
中科院分区：
文献类型：
--
作者：
Y. Sakamoto;T. Cho;M. Hirata;T. Yoshimura;K. Makino;Y. Nakashima;K. Yatsu;T. Tamano;S. Miyoshi
一种新型端损离子能谱仪设计用于开放式等离子体约束装置中的等离子体离子诊断。该分析仪显着升级了以前的倾斜栅极端损分析仪（SELA），除了网格离子能量分析仪通常的积分谱操作之外，还可以从根本上消除二次电子电流，并提供差分谱操作模式。升级后的 SELA 由于采用静电操作，不会干扰环境磁场。微分或积分光谱是通过栅极电压的时间扫描获得的，收集单通道板上的离子电流。由于 SELA 的角度对准并不重要，因此它可以用作离子能量分布和等离子体电势的空间可扫描诊断。它的特征是通过计算机模拟来自世界上最大的串联镜 GAMMA 10 的离子轨迹、单能离子束和端损等离子体。
A novel end‐loss ion‐energy spectrometer is designed for plasma‐ion diagnostics in open‐ended plasma‐confinement devices. This analyzer significantly upgrades a previous slanted grid end‐loss analyzer (SELA) to essentially eliminate secondary‐electron current, and to provide a differential‐spectrum mode of operation, in addition to the usual integral‐spectrum operation of gridded ion‐energy analyzers. The upgraded SELA does not perturb the ambient magnetic field due to its electrostatic operation. Either the differential or integral spectra are obtained by a time sweep of grid voltages, collecting the ion current on a single‐channel plate. Because the angular alignment of the SELA is not critical, it can be used as a spatially scannable diagnostic of ion‐energy distributions and plasma potentials. It is characterized using computer simulations of ion trajectories, monoenergetic ion beams, and end‐loss plasma from the world’s largest tandem mirror—GAMMA 10.