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

被引：33
|
作者：
Smith, D. R. [1 ]
Feder, H. [2 ]
Feder, R. [2 ]
Fonck, R. J. [1 ]
Labik, G. [2 ]
McKee, G. R. [1 ]
Schoenbeck, N. [1 ]
Stratton, B. C. [2 ]
Uzun-Kaymak, I. [1 ]
Winz, G. [1 ]
机构：
[1] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA
[2] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2010年 / 81卷 / 10期
关键词：
D O I：
10.1063/1.3478660
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
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-alpha emission from a deuterium neutral heating beam. The system includes two optical views centered at r/a approximate to 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 approximate to 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 Alfven/energetic particle modes on NSTX. (C) 2010 American Institute of Physics. [doi:10.1063/1.3478660]
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页数：3
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