FLUCTUATION MEASUREMENTS IN THE PLASMA INTERIOR ON TFTR

被引：42

作者：

FONCK, RJ ^{[1
]}

BRETZ, N ^{[1
]}

COSBY, G ^{[1
]}

DURST, R ^{[1
]}

MAZZUCATO, E ^{[1
]}

NAZIKIAN, R ^{[1
]}

PAUL, S ^{[1
]}

SCOTT, S ^{[1
]}

TANG, W ^{[1
]}

ZARNSTORFF, M ^{[1
]}

机构：

[1] PRINCETON UNIV,PLASMA PHYS LAB,PRINCETON,NJ 08544

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 1992年 / 34卷 / 13期

关键词：

D O I：

10.1088/0741-3335/34/13/031

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：

New beam emission spectroscopy and correlation reflectometry density fluctuation diagnostics on TFTR allow examination of the crucial long wavelength (k(perpendicular-to rho i) < 0.1) region, where microwave scattering has indicated the bulk of the power density lies. The turbulent spectrum for low k is broadband and dominated by low frequencies (< 200 KHz), and the exact nature of the spectrum is dominated by Doppler effects. These core diagnostics show n/n rising as tau(E) decreases. Radial and poloidal correlation lengths from BES are comparable and are roughly 2-3 cm near the plasma edge and gradually drop to 1-2 cm in the region of r/a = 0.5-0.7. Values < 1.5 cm are indicated deeper in the com region, but precise values await further analysis which takes into account the effects of finite spatial resolution of the BES measurements. A strong anisotropy in the radial and poloidal wavenumber spectra is indicated from the shape of the correlation functions. The poloidal wavenumber spectrum does not increase indefinitely as k goes to 0 cm-1, but has a peak in the range of 1-2 cm-1.

引用

页码：1993 / 1999

页数：7

共 12 条

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