首页|Global gyrokinetic simulations of electrostatic microturbulent transport using kinetic electrons in LHD stellarator

Global gyrokinetic simulations of electrostatic microturbulent transport using kinetic electrons in LHD stellarator

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Global gyrokinetic simulations of ion temperature gradient (ITG) and trapped electron mode (TEM) in the LHD stellarator are carried out using the gyrokinetic toroidal code (GTC) with kinetic electrons. ITG simulations show that kinetic electron effects increase the growth rate by more than 50% and more than double the turbulent transport levels compared with simulations using adiabatic electrons. Zonal flow dominates the saturation mechanism in the ITG turbulence. Nonlinear simulations of the TEM turbulence show that the main saturation mechanism is not the zonal flow but the inverse cascade of high to low toroidal harmonics. Further nonlinear simulations with various pressure profiles indicate that the ITG turbulence is more effective in driving heat conductivity whereas the TEM turbulence is more effective for particle diffusivity.

simulationkinetic electronsstellaratormicroturbulencegyrokinetic

Tajinder Singh、Javier H. Nicolau、Zhihong Lin、Sarveshwar Sharma、Abhijit Sen、Animesh Kuley

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Department of Physics, Indian Institute of Science, Bangalore 560012, India

Department of Physics and Astronomy, University of California, Irvine, CA 92697, United States of America

Institute for Plasma Research, Bhat, Gandhinagar 382428, India, Homi Bhabha National Institute, Anushaktinagar, Mumbai, Maharashtra 400094, India

2022

10.1088/1741-4326/ac906d

Nuclear fusion

Nuclear fusion

SCI
ISSN：0029-5515
年,卷(期)：2022.62(12)
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