Microtearing Instabilities and Electron Transport in the NSTX Spherical Tokamak

Wong, K. L. ; Kaye, S. ; Mikkelsen, D. R. ; Krommes, J. A. ; Hill, K. ; Bell, R. ; LeBlanc, B

关键词: ELECTRON TEMPERATURE;    ELECTRONS;    FLUCTUATIONS;    INSTABILITY;    PLASMA;    THERMAL CONDUCTIVITY;    TRANSPORT Transport Phenomena;    Tokamaks;    NSTX' Tearing Instability;   

DOI  :  10.2172/961882
RP-ID  :  PPPL-4261
PID  :  OSTI ID: 961882
Others  :  TRN: US0903234

学科分类：原子、分子光学和等离子物理

美国|英语

来源: SciTech Connect

【 摘 要 】

We report a successful quantitative account of the experimentally determined electron thermal conductivity χe in a beam-heated H mode plasma by the magnetic fluctuations from microtearing instabilities. The calculated χe based on existing nonlinear theory agrees with the result from transport analysis of the experimental data. Without using any adjustable parameter, the good agreement spans the entire region where there is a steep electron temperature gradient to drive the instability.