国家球形托卡马克实验装置上的束发射光谱诊断系统概述。

Overview of the beam emission spectroscopy diagnostic system on the National Spherical Torus Experiment.

作者信息

Smith D R, Feder H, Feder R, Fonck R J, Labik G, McKee G R, Schoenbeck N, Stratton B C, Uzun-Kaymak I, Winz G

机构信息

Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.

出版信息

Rev Sci Instrum. 2010 Oct;81(10):10D717. doi: 10.1063/1.3478660.

DOI:10.1063/1.3478660

PMID:21033910

Abstract

A beam emission spectroscopy (BES) system has been installed on the National Spherical Torus Experiment (NSTX) to study ion gyroscale fluctuations. The BES system measures D(α) emission from a deuterium neutral heating beam. The system includes two optical views centered at r/a≈0.45 and 0.85 and aligned to magnetic field pitch angles at the neutral beam. f/1.5 collection optics produce 2-3 cm spot sizes at the neutral beam. The initial channel layout includes radial arrays, poloidal arrays, and two-dimensional grids. Radial arrays provide coverage from r/a≈0.1 to beyond the last-closed flux surface. Photodetectors and digital filters provide high-sensitivity, low-noise measurements at frequencies of up to 1 MHz. The BES system will be a valuable tool for investigating ion gyroscale turbulence and Alfvén/energetic particle modes on NSTX.

摘要

一个束发射光谱（BES）系统已安装在国家球形托卡马克实验（NSTX）上，用于研究离子陀螺尺度涨落。该BES系统测量来自氘中性加热束的D（α）发射。该系统包括两个以r/a≈0.45和0.85为中心的光学视场，并与中性束处的磁场俯仰角对齐。f/1.5收集光学器件在中性束处产生2 - 3厘米的光斑尺寸。初始通道布局包括径向阵列、极向阵列和二维网格。径向阵列提供从r/a≈0.1到最后封闭磁通面之外的覆盖范围。光电探测器和数字滤波器在高达1 MHz的频率下提供高灵敏度、低噪声测量。BES系统将成为研究NSTX上离子陀螺尺度湍流和阿尔文/高能粒子模式的宝贵工具。