Potential Profile Measurements Inside a Gridded Cathode at High Potential in a Spherical Inertial Electrostatic Confinement Device
Potential Profile Measurements Inside a Gridded Cathode at High Potential in a Spherical Inertial Electrostatic Confinement Device
复制标题
球形惯性静电约束装置中高电势栅格阴极内部的电势分布测量
DOI：
10.1080/15361055.2019.1610292
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发表时间：
2019
影响因子：
0.9
通讯作者：
and Mahmoud A. Bakr
中科院分区：
文献类型：
--
作者：
Kai Masuda;Ryosuke Kashima;and Mahmoud A. Bakr
提出了一种基于Langmuir探针的惯性静电约束装置中栅格阴极内高偏置电位等离子体参数诊断方法。作为概念验证的第一步，在辉光放电模式下测量了氘和氦等离子体中的浮动电位分布。成功地进行了熔合相关阴极电压高达55kv的测量。结果表明，在阴极电压低于5 kV的情况下，栅极中心的正电位积累在外加偏置电压的5% ~ 8%之间，远小于前人的研究。氘和氦放电等离子体的浮动电位分布也有显著差异。
This paper proposes a Langmuir probe–based diagnostics for plasma parameters inside gridded cathodes at high bias potentials in inertial electrostatic confinement devices. As the first step for the proof of concept, floating potential profiles were measured in deuterium and helium plasmas in a glow-discharge mode. The measurements with fusion-relevant cathode voltages up to 55 kV were carried out successfully. The results revealed that the positive potential buildup at the center ranges from 5% to 8% of the applied bias voltage to the gridded cathode, which is found to be much smaller than those in earlier works under cathode voltages lower than 5 kV. It was also shown that the floating potential profile is different significantly between deuterium and helium discharge plasmas.