FAST-ELECTRON TRANSPORT AND LOWER-HYBRID ABSORBED POWER PROFILES FROM HARD X-RAY-IMAGING IN THE PRINCETON BETA-EXPERIMENT-MODIFIED

被引:19
|
作者
JONES, SE
KESNER, J
LUCKHARDT, S
PAOLETTI, F
VONGOELER, S
BERNABEI, S
KAITA, R
GIRUZZI, G
机构
[1] PRINCETON PLASMA PHYS LAB, PRINCETON, NJ 08543 USA
[2] CEN CADARACHE, TORE SUPRA, F-13108 ST PAUL LES DURANCE, FRANCE
关键词
D O I
10.1063/1.871484
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
Recent hardware improvements on the hard x-ray camera of the Princeton Beta Experiment-Modified (PBX-M) expand the capabilities for observing bremsstrahlung radiation from fast electrons during lower hybrid current drive (LHCD) experiments, thereby allowing accurate fast electron transport studies. Developed methods to directly invert two-dimensional x-ray images reveal radial profiles of the emitted intensity and isotropy. Such profiles extracted from lower hybrid (LH) modulation experiments permit computation of the lower hybrid power absorption profile. Results from application to the LH phase scans demonstrate the ability to control the peak location of the driven current. Incorporating these results into simulations using both a three-dimensional Fokker-Planck code and a simple modulation model provides lower and upper bound estimates for the hot electron diffusion coefficient D*. © 1995 American Institute of Physics.
引用
收藏
页码:1548 / 1560
页数:13
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