Doppler reflectometer system in the stellarator TJ-II

被引：90
作者：
Happel, T. [1 ]
Estrada, T. [1 ]
Blanco, E. [1 ]
Tribaldos, V. [1 ]
Cappa, A. [1 ]
Bustos, A. [1 ]
机构：
[1] Asociac Euratom CIEMAT, Lab Nacl Fus, Madrid 28040, Spain
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2009年 / 80卷 / 07期
关键词：
Doppler measurement; plasma confinement; plasma density; plasma diagnostics; stellarators; PROPAGATING DENSITY PERTURBATIONS; VELOCITY SHEAR-LAYER; FULL-WAVE CODE; PROFILE MEASUREMENTS; PLASMA; TURBULENCE; BEAM; FLUCTUATIONS; FLOW;
D O I：
10.1063/1.3160106
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A Doppler reflectometer system has recently been installed in the stellarator TJ-II. The system is optimized for the Q-band (33-50 GHz) and the high-curvature plasmas produced in TJ-II. The launch angle of the microwave beam can be controlled by a steerable mirror to obtain angles between +/- 20 degrees enabling the measurement of perpendicular wave numbers in the range of 3-15 cm(-1). The available angular range allows for comparisons between positive and negative values and additionally for calibration of the system. Localization and k(perpendicular to)-estimation is done via the three-dimensional ray/beam-tracing code TRUBA. First measured spectra and radial profiles of the perpendicular velocity of plasma density fluctuations are presented.
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页数：8
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