May 8-10

Abstract Details

files Add files

Abstracts

Author: Wenhao Wang
Requested Type: Poster
Submitted: 2023-03-30 16:44:54

Co-authors: W.H. Wang, X. S. Wei, Z. Lin, S. Dettrick, C. Lau, T. Tajima

Contact Info:
University of California, Irvine
4155A Frederick Reines Hall, U
Irvine, California   92697-4575
United States

Abstract Text:
The electrostatic presheath potential in the SOL of FRC could affect the turbulent transport in the SOL and the penetration of divertor biasing to the FRC confinement region. A full-f gyrokinetic simulation is used to find the SOL equilibrium including presheath potential, which is intrinsically 2D resulting from the balance between radial and parallel transport. We have formulated an electrostatic simulation model for the SOL pre-sheath and implemented in the GTC-X code. The model has first been verified in a 1D presheath simulation on a single flux surface by recovering the parallel force balance and continuity equation. To capture the penetration of the divertor biasing, a resistive radial current model is proposed to determine a more realistic 2D structure of the presheath potential. This fluid electron model can provide insights for understanding the current distribution with a biasing potential at the divertor and explain the formation of electrostatic potential profile in the SOL region.

Comments: