OPTICAL FLUCTUATION MEASUREMENTS OF TURBULENCE USING A DIAGNOSTIC BEAM ON PHAEDRUS-T

被引：15

作者：

EVENSEN, H

BROUCHOUS, D

DIEBOLD, D

DOCZY, M

FONCK, RJ

NOLAN, D

机构：

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1992年 / 63卷 / 10期

关键词：

D O I：

10.1063/1.1143552

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Plasma density turbulence has been measured with the beam emission spectroscopy (BES) diagnostic system, using a low-power neutral beam with He-0 and H-0 as beam species. In general, He-0 (588 nm) provided the best signal-to-noise ratio due to its lower edge plasma background interference. Simultaneous measurements of edge density fluctuations have been made with BES and Langmuir probes; the spectra are seen to be essentially identical, and the fluctuation amplitudes from both diagnostics are in close agreement. A poloidal coherence length of about 2-4 cm was observed. Radial propagation of modes was not seen, but a lab-frame poloidal phase velocity at r/a = 0.77 of about 7 X 10(5) cm/s in the electron diamagnetic direction was observed, corresponding to m = 8-75 kHz.

引用

页码：4928 / 4930

页数：3

共 11 条

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