On the scattering correction of fast-ion D-alpha signals on NSTX-U

被引：4
|
作者：
Hao, G. Z. [1 ]
Heidbrink, W. W. [1 ]
Liu, D. [1 ]
Stagner, L. [1 ]
Podesta, M. [2 ]
Bortolon, A. [2 ]
机构：
[1] Univ Calif Irvine, Irvine, CA 92697 USA
[2] Princeton Plasma Phys Lab, Princeton, NJ 08540 USA
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2018年 / 89卷 / 06期
关键词：
D O I：
10.1063/1.5031879
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Analysis of fast-ion D-alpha (FIDA) data on National Spherical Torus Experiment-Upgrade (NSTX-U) shows that the cold D-alpha line contaminates the FIDA baseline. The scattered light is comparable to the FIDA emission. A scattering correction is required to extract the FIDA signal. Two methods that relate the scattered light contamination to the intensity of the cold D-alpha line are employed. One method uses laboratory measurements with a calibration lamp; the other method uses data acquired during plasma operation and singular value decomposition analysis. After correction, both the FIDA spectra and spatial profile are in better agreement with theoretical predictions. Published by AIP Publishing.
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页数：12
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