Fluctuation reflectometry of azimuthally symmetric plasmas

被引:19
作者
Bruskin, LG
Mase, A
Oyama, N
Miura, Y
机构
[1] Japan Atom Energy Res Inst, Naka Fus Res Estab, Naka, Ibaraki 3110193, Japan
[2] Kyushu Univ, Adv Sci & Technol Ctr Cooperat Res, Kasuga, Fukuoka 8168580, Japan
关键词
D O I
10.1088/0741-3335/44/11/302
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
The results of analytical solution of time-dependent two-dimensional full-wave equation are presented here for the case of fluctuation reflectometry. We consider a family of plasma density profiles with cylindrical symmetry, which allow for an integration of the microwave scattering equation. Based on the results of analytical modelling, Doppler reflectometry as a method of plasma velocity measurements is investigated. It is shown that the accuracy of Doppler shift measurements is sensitive to the spectral content of the broadband turbulence, as well as to the curvature of the plasma cutoff layer. Addressing the problem of fluctuation amplitude measurements, it is suggested that a power-related parameter of the microwave signal, called fluctuation index, is suitable to quantify the plasma turbulence level provided that the fluctuation spectrum is a priori estimated. As an illustration, we apply our model to estimate the density fluctuation level in the edge plasma of the JT-60U tokamak.
引用
收藏
页码:2305 / 2325
页数:21
相关论文
共 45 条
[1]  
ASAKURA N, 2002, COMMUNICATION
[2]   ONE-DIMENSIONAL MODELING OF THE WAVELENGTH SENSITIVITY, LOCALIZATION, AND CORRELATION IN REFLECTOMETRY MEASUREMENTS OF PLASMA FLUCTUATIONS [J].
BRETZ, N .
PHYSICS OF FLUIDS B-PLASMA PHYSICS, 1992, 4 (08) :2414-2422
[3]   Diagnostic instrumentation for microturbulence in tokamaks [J].
Bretz, N .
REVIEW OF SCIENTIFIC INSTRUMENTS, 1997, 68 (08) :2927-2964
[4]   Effect of plasma profile curvature on microwave scattering in reflectometry [J].
Bruskin, LG ;
Mase, A .
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2002, 71 (05) :1274-1279
[5]   Analytical study of ultra-short pulse reflectometry [J].
Bruskin, LG ;
Mase, A ;
Yamamoto, A ;
Kogi, Y .
PLASMA PHYSICS AND CONTROLLED FUSION, 2001, 43 (10) :1333-1349
[6]   2-DIMENSIONAL MICROWAVE-SCATTERING BY FLUCTUATIONS OF PLASMA-DENSITY AND MAGNETIC-FIELD [J].
BRUSKIN, LG ;
MASE, A ;
TAMANO, T .
PLASMA PHYSICS AND CONTROLLED FUSION, 1995, 37 (03) :255-269
[7]   Study of plasma fluctuations in the Tuman-3M tokamak using microwave reflectometry with an obliquely incident probing beam [J].
Bulanin, VV ;
Lebedev, SV ;
Levin, LS ;
Roytershteyn, VS .
PLASMA PHYSICS REPORTS, 2000, 26 (10) :813-819
[8]  
CHANG K, 1989, HDB MICROWAVE ELECTR, V1, P345
[9]   Edge density profile measurements by X-mode reflectometry on Tore Supra [J].
Clairet, F ;
Bottereau, C ;
Chareau, JM ;
Paume, M ;
Sabot, R .
PLASMA PHYSICS AND CONTROLLED FUSION, 2001, 43 (04) :429-441
[10]   Plasma density fluctuation measurements from coherent and incoherent microwave reflection [J].
Conway, GD ;
Schott, L ;
Hirose, A .
PLASMA PHYSICS AND CONTROLLED FUSION, 1996, 38 (04) :451-466