Radial transport of the nonthermal electrons in runaway discharges in the SINP tokamak from analysis of hard x-ray fluctuations

被引：2

作者：

Hui, A. K. ^{[1
]}

Saha, S. K. ^{[1
]}

Chowdhury, S. ^{[1
]}

Raychaudhuri, Santwana ^{[1
]}

Banik, D. ^{[1
]}

机构：

[1] Saha Inst Nucl Phys, Div Plasma Phys, Kolkata 700064, India

来源：

NUCLEAR FUSION | 2009年 / 49卷 / 11期

关键词：

MAGNETIC TURBULENCE; PARTICLE-TRANSPORT; MACROTOR TOKAMAK;

D O I：

10.1088/0029-5515/49/11/115025

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：

X-ray bursts from nonthermal electrons (similar to 10 keV to 1 MeV) emanating from the core plasma and the limiter are measured simultaneously in runaway dominated discharges in the SINP tokamak using a tangentially viewing NaI(Tl) detector and a detector that views the limiter areas. The radial transport coefficient of the nonthermal electrons has been derived from the cross-correlation function of the two x-ray intensities. Two phases of the plasma discharges with distinct transport of the nonthermal electrons are found in these experiments. The stochastic magnetic field fluctuations obtained from the transport coefficients are found to have a relationship with the autocorrelation functions of the x-ray emissivity signals.

引用

页数：7