Atomic beam diagnostics for characterization of edge plasma in TJ-II stellarator
Atomic beam diagnostics for characterization of edge plasma in TJ-II stellarator
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DOI：
10.1063/1.1319868
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发表时间：
2001-01-01
影响因子：
1.6
通讯作者：
Ortiz, P
中科院分区：
文献类型：
--
作者：
Brañas, B;Tafalla, D;Ortiz, P
氦束和锂束已安装在TJ-II星形仪上并投入运行，目的是测量等离子体边缘和刮离层区域的电子温度和密度分布。在典型的电子回旋加热等离子体中，热流Li束穿透到归一化有效半径Rho=0.6-0.7。从Li光束得到的密度分布比由汤姆逊散射测量的密度分布外推得到的分布更宽。氦束是一种脉冲超音速光束。用一组三个光电倍增管同时检测三条发射线(667.2、706.5和728.1 nm)。首先给出了TJ-II中N(E)和T-e的He束流测量结果，并讨论了不同等离子体边缘诊断结果之间的一致性。(C)2001年美国物理研究所。
He and Li beams have been installed and set into operation at the TJ-II stellarator with the aim of measuring electron temperature and density profiles in the edge and scrape-off layer regions of the plasma. The effusive thermal Li beam penetrates up to a normalized effective radius of rho = 0.6-0.7 in typical electron cyclotron heated plasmas. Density profiles deduced from the Li beam are wider than those obtained from extrapolation of the profile measured by Thomson scattering. The He beam is a pulsed supersonic one. Simultaneous detection of three emission lines (667.2, 706.5, and 728.1 nm) is made with a set of three photomultipliers. First He beam measurements of n(e) and T-e in TJ-II are presented and the agreement among results of different plasma edge diagnostics is discussed. (C) 2001 American Institute of Physics.