Spectroscopic method to directly measure electric field distribution in tokamak plasma edge
Spectroscopic method to directly measure electric field distribution in tokamak plasma edge
复制标题
直接测量托卡马克等离子体边缘电场分布的光谱法
DOI：
10.1063/1.1147778
复制
发表时间：
1997
影响因子：
1.6
通讯作者：
K. Mizuno
中科院分区：
文献类型：
--
作者：
K. Takiyama;T. Katsuta;M. Watanabe;S. Li;T. Oda;T. Ogawa;K. Mizuno
为了利用激光诱导荧光（LIF）技术直接测量托卡马克等离子体边缘区的电场分布，研制了一台脉冲工作的超声氦束源。在该技术中，仅必须观察由于斯塔克效应和电四极而由激光激发的禁戒跃迁产生的LIF的极化，以确定电场强度。不需要校准LIF和可调谐激光器的绝对强度。在距脉冲喷嘴7 cm处获得氦原子束密度（约1020个He原子cm-2 s-1）。一个模型型的实验，以明确的磁场对LIF的影响的报告。并对在中型托卡马克装置上安装超声束流和光谱测量系统进行了设计研究。
A supersonic helium beam source operated in pulse mode was constructed for direct measurement of electric field distribution in the tokamak plasma edge region with the aid of laser-induced fluorescence (LIF) technique. In this technique only the polarization has to be observed of a LIF resulting from a laser-excited forbidden transition due to the Stark effect and the electric quadrupole to determine the electric field strength. No calibration is needed of the absolute intensity of LIF and tunable laser used. The helium atom beam density was obtained (about 1020 He atoms cm−2 s−1) at a distance of 7 cm from the pulsed nozzle. A model-type experiment to make clear the influence of a magnetic field on the LIF is reported. Design study was also made to install the supersonic beam and spectroscopic measurement system on a medium size tokamak.