Development of a cross-polarization scattering system for the measurement of internal magnetic fluctuations in the DIII-D tokamak

被引：13
|
作者：
Rhodes, T. L. [1 ]
Peebles, W. A. [1 ]
Crocker, N. A. [1 ]
Nguyen, X. [1 ]
机构：
[1] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90098 USA
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2014年 / 85卷 / 11期
关键词：
MICROWAVE-SCATTERING; DENSITY; PLASMA; WAVES; FIELD;
D O I：
10.1063/1.4887276
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The design and performance of a new cross-polarization scattering (CPS) system for the localized measurement of internal magnetic fluctuations is presented. CPS is a process whereby magnetic fluctuations scatter incident electromagnetic radiation into a perpendicular polarization which is subsequently detected. A new CPS design that incorporates a unique scattering geometry was laboratory tested, optimized, and installed on the DIII-D tokamak. Plasma tests of signal-to-noise, polarization purity, and frequency response indicate proper functioning of the system. CPS data show interesting features related to internal MHD perturbations known as sawteeth that are not observed on density fluctuations. (C) 2014 AIP Publishing LLC.
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页数：4
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