Understanding extraction and beam transport in the ISIS H(-) Penning surface plasma ion source.
Understanding extraction and beam transport in the ISIS H(-) Penning surface plasma ion source.
复制标题
了解 ISIS H(-) Penning 表面等离子体离子源中的提取和束流传输。
DOI：
10.1063/1.2821506
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
M. Woods
中科院分区：
文献类型：
--
作者：
D. Faircloth;A. Letchford;C. Gabor;M. Whitehead;T. Wood;S. Jolly;J. Pozimski;P. Savage;M. Woods
ISIS H(-)Penning表面等离子体源已研制成功，可在50赫兹产生高达70 mA的束流和1.5ms的脉冲长度。本文对束流引出和束流输运进行了详细的研究，以期了解束流发射度和提高束流发射度。开发了一种闪烁体轮廓测量技术，以评估不同等离子体电极孔径、引出电极几何形状和引出后加速配置的性能。这项工作表明，目前的引出、束流传输和后加速系统是次优的，需要进一步的工作来改进。
The ISIS H(-) Penning surface plasma source has been developed to produce beam currents up to 70 mA and pulse lengths up to 1.5 ms at 50 Hz. This paper details the investigation into beam extraction and beam transport in an attempt to understand the beam emittance and to try to improve the emittance. A scintillator profile measurement technique has been developed to assess the performance of different plasma electrode apertures, extraction electrode geometries, and postextraction acceleration configurations. This work shows that the present extraction, beam transport, and postacceleration system are suboptimal and further work is required to improve it.