Spatiotemporal oscillation of an ion beam extracted from a potential-oscillating plasma source
Spatiotemporal oscillation of an ion beam extracted from a potential-oscillating plasma source
复制标题
从电位振荡等离子体源提取的离子束的时空振荡
DOI：
10.1088/1367-2630/ab3f70
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发表时间：
2019
影响因子：
3.3
通讯作者：
Ikeda Katsunori
中科院分区：
文献类型：
--
作者：
Takahashi Kazunori;Imagi Tsuyoshi;Ishitomi Masashi;Nagaoka Kenichi;Haba Yasuaki;Nakano Haruhisa;Ando Akira;Kisaki Masashi;Tsumori Katsuyoshi;Ikeda Katsunori
在保持恒定等离子体密度的情况下，在离子束源中将射频振荡成功地叠加在丝状源等离子体的等离子体电势上，以研究振荡源等离子体电势对引出的离子束的影响。实验初步采用正极Ar离子束源进行。安装了一个在几十千赫到几兆赫的宽频率范围内工作的D类放大器；在被测试的频率范围内，导致等离子体源中的等离子体电位振荡。引出栅下游的束流分布显示出离子束外围区域束流的振荡，这意味着束晕的振荡是由源等离子体的电势振荡引起的。
A radiofrequency oscillation is successfully superimposed on a plasma potential of a filamented source plasma in an ion beam source while maintaining a constant plasma density, in order to investigate effects of oscillating source plasma potential on an extracted ion beam. The experiment is preliminarily performed with a positive argon ion beam source. A class-D amplifier operational over a wide range of a frequency from a few tens of kHz to several MHz is installed; leading the oscillation of the plasma potential in the plasma source for the frequency range being tested. The beam current profile downstream of the extraction grids shows an oscillation of the beam current at the peripheral region of the ion beam; implying that the oscillation of a beam halo is induced by the potential oscillation of the source plasma.