Design of ERD diagnostic system on EAST tokamak

doi:10.16568/j.0254-6086.201504003

Abstract

Abstract:

A new edge rotation diagnostic system (ERD) was developed to measure the edge plasma rotation velocities and ion temperature profiles toroidally and poloidally. The collective optics adopts the ‘plug-in’ concept and is very flexible for additional system adjustment and maintenance after installation. For the spectrometer, a multi-slit entrance is used to effectively improve the capacity of the spectrometer and accommodate more optical fibers. A back-illuminated EMCCD is adopted as the photon detector for its high sensitivity and wide dynamic range. The high OH-radical concentration fused silica fibers are adopted to resist the neutron radiation. The system is in the visible wavelength range (350~800nm), the achieved temporal and spatial resolution is 15ms and 1cm respectively. Experimental results during the LHW phase are consistent with the collaborative experimental results from the XCS and fast reciprocating probe.

Key words: EAST tokamak, ERD diagnostic, Ion temperature, Rotation velocity

摘要：

在EAST 装置上研制了一套边界旋转测量系统(ERD)用于测量边界等离子体环向/极向旋转速度和离子温度分布。前置收光系统采用了嵌入式(plug-in)结构，便于系统调试与维护。光谱仪设计成多入射狭缝结构，可容纳更多的光纤，提高了其利用率。探测器选用了高灵敏度和高动态范围的电子倍增CCD(EMCCD)探测器。使用了含高OH 基浓度的石英光纤，可以承受一定剂量的中子辐射。系统设计的测量波段为350~800nm，最高时间分辨为15ms，空间分辨为1cm。低杂波注入下的实验结果与早期EAST 上二维弯晶谱仪与快速往复探针联合实验的结论一致。

关键词: EAST装置, ERD诊断, 离子温度, 旋转速度

CLC Number:

TL65+1

LI Ying-ying1, YIN Xiang-hui2, ZHANG Yi2, FENG Shuang-yuan2, FU Jia1, Lü Bo1. Design of ERD diagnostic system on EAST tokamak[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2015, 35(4): 302-307.

李颖颖1，尹相辉2，张镱2，冯双圆2，符佳1，吕波1. EAST 装置上ERD 光谱诊断系统设计[J]. 核聚变与等离子体物理, 2015, 35(4): 302-307.

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