Combination Doppler backscattering/cross-polarization scattering diagnostic for the C-2W field-reversed configuration

被引：4
|
作者：
Schmitz, L. [1 ,2 ]
Deng, B. [2 ]
Thompson, M. [2 ]
Gota, H. [2 ]
Lau, C. [2 ]
Fulton, D. P. [2 ]
Lin, Z. [3 ]
Tajima, T. [2 ,3 ]
Binderbauer, M. [2 ]
机构：
[1] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
[2] TAE Technol Inc, Foothill Ranch, CA 92610 USA
[3] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2018年 / 89卷 / 10期
关键词：
MAGNETIC FLUCTUATIONS; ELECTROMAGNETIC-WAVE; PLASMA; TURBULENCE; ION;
D O I：
10.1063/1.5038914
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A versatile combination Doppler backscattering and Cross-Polarization Scattering (CPS) diagnostic for the C-2W beam-driven field-reversed configuration is described. This system is capable of measuring density fluctuations and perpendicular magnetic field fluctuations across a wide wavenumber range ( 2.5 <= k theta rho(s) <= 50), with typical resolution Delta k(theta)/k(theta) <= 0.4-0.8. Four tunable frequencies (26 GHz <= f <= 60 GHz corresponding to plasma cut-off densities 0.8 x 10(19) <= n(e) <= 4.4 x 10(19) m(-3)) are launched via quasi-optical beam combiners/polarizers and an adjustable parabolic focusing mirror selecting the beam incidence angle. GENRAY ray tracing shows that the incident O-mode and backscattered CPS X-mode beam trajectories for C-2W plasma parameters nearly overlap, allowing simultaneous detection of (n) over tilde and (B) over tilde (r) or (B) over tilde (theta) from essentially the same scattering volume. Published by AIP Publishing.
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页数：5
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