HL-2A托卡马克上的高空间和时间分辨率电荷交换复合光谱学。

High spatial and temporal resolution charge exchange recombination spectroscopy on the HL-2A tokamak.

作者信息

Wei Y L, Yu D L, Liu L, Ida K, von Hellermann M, Cao J Y, Sun A P, Ma Q, Chen W J, Liu Yi, Yan L W, Yang Q W, Duan X R, Liu Yong

机构信息

Southwestern Institute of Physics, Chengdu 610041, China.

National Institute for Fusion Science, Toki 509-5292, Japan.

出版信息

Rev Sci Instrum. 2014 Oct;85(10):103503. doi: 10.1063/1.4897186.

DOI:10.1063/1.4897186

PMID:25362389

Abstract

A 32/64-channel charge exchange recombination spectroscopy (CXRS) diagnostic system is developed on the HL-2A tokamak (R = 1.65 m, a = 0.4 m), monitoring plasma ion temperature and toroidal rotation velocity simultaneously. A high throughput spectrometer (F/2.8) and a pitch-controlled fiber bundle enable the temporal resolution of the system up to 400 Hz. The observation geometry and an optimized optic system enable the highest radial resolution up to ∼1 cm at the plasma edge. The CXRS system monitors the carbon line emission (C VI, n = 8-7, 529.06 nm) whose Doppler broadening and Doppler shift provide ion temperature and plasma rotation velocity during the neutral beam injection. The composite CX spectral data are analyzed by the atomic data and analysis structure charge exchange spectroscopy fitting (ADAS CXSFIT) code. First experimental results are shown for the case of HL-2A plasmas with sawtooth oscillations, electron cyclotron resonance heating, and edge transport barrier during the high-confinement mode (H-mode).

摘要

在HL-2A托卡马克装置（R = 1.65米，a = 0.4米）上开发了一套32/64通道电荷交换复合光谱（CXRS）诊断系统，可同时监测等离子体离子温度和环向旋转速度。一台高通量光谱仪（F/2.8）和一束俯仰控制光纤束使该系统的时间分辨率高达400赫兹。观测几何结构和优化的光学系统使等离子体边缘处的最高径向分辨率达到约1厘米。CXRS系统监测碳线发射（C VI，n = 8 - 7，529.06纳米），其多普勒展宽和多普勒频移在中性束注入期间提供离子温度和等离子体旋转速度。复合CX光谱数据由原子数据与分析结构电荷交换光谱拟合（ADAS CXSFIT）代码进行分析。给出了HL-2A等离子体在高约束模式（H模式）下出现锯齿振荡、电子回旋共振加热和边缘输运垒情况时的首批实验结果。