BROAD-BAND DENSITY FLUCTUATION MEASUREMENTS USING A HEAVY-ION BEAM PROBE ON THE TEXAS EXPERIMENTAL TOKAMAK

被引：8

作者：

HEARD, JW ^{[1
]}

CROWLEY, TP ^{[1
]}

SCHOCH, PM ^{[1
]}

HICKOCK, RL ^{[1
]}

ROSS, DW ^{[1
]}

ZHANG, BZ ^{[1
]}

YANG, XZ ^{[1
]}

机构：

[1] UNIV TEXAS, FUS RES CTR, AUSTIN, TX 78712 USA

来源：

PHYSICS OF PLASMAS | 1995年 / 2卷 / 09期

关键词：

D O I：

10.1063/1.871170

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：

Broad bandwidth (60 kHz less than or equal to f less than or equal to 500 kHz), long wavelength ((k) over bar(theta)less than or equal to 2 cm(-1)) density fluctuation measurements were made using a heavy ion beam probe on the Texas Experimental Tokamak (TEXT) [K. W. Gentle, Nucl. Technol./Fusion 1, 479 (1981)]. Fluctuation amplitudes and correlation length scalings do not correspond to linear or quasilinear drift wave theory. Power-weighted root-mean-square (rms) wave number estimates are much lower ([(k) over bar(theta)](rms)rho(s) less than or equal to 0.1, rho(s)=[m(i)T(e)](1/2)/eB) than quasilinear theoretical expectations ((k) over bar(perpendicular to)rho(s) similar to 0.3). Core results indicate strong turbulence with a wave number spread, Delta k similar to (k) over bar at fixed frequency f, consistent with strong turbulence predictions, while edge results can be considered consistent with weak turbulence. In between the core and edge (0.6 less than or equal to r/a less than or equal to 0.8) is a transition region. (C) 1995 American Institute of Physics.

引用

页码：3360 / 3367

页数：8

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