Abstract Details
Abstracts
Author: Seung-Hoe Ku
Requested Type: Poster
Submitted: 2023-03-30 23:01:05
Co-authors: R. Hager, C.S. Chang, A.Y. Sharma, R.M. Churchill (PPPL), A. Scheinberg (Jubilee Development)
Contact Info:
Princeton Plasma Physics Laboratory
100 Stellarator Rd.
Princeton, NJ
USA
Abstract Text:
Understanding the underlying physics of the divertor heat-load width is crucial for the successful operation of ITER. Previous simulations using XGC agreed with the “Eich” formula but predicted a wider turbulence-enhanced heat-load width for ITER [1]. However, these simulations were electrostatic, and the effect of electromagnetic turbulence was unknown. Recently, an electromagnetic algorithm was added to XGC using the mixed-variable and pull-back transformation [2, 3]. XGC has been simulating electromagnetic physics while retaining all the total-f capabilities that self-consistently include neoclassical physics, turbulence physics, neutral particle recycling, heat and torque sources, nonlinear Fokker-Planck collisions, logical sheath, etc. We studied the heat-flux width for DIII-D and ITER H-mode plasmas and found that electromagnetic effects increase the heat-load width by 20-30% compared to electrostatic simulations.
This work is funded by DOE FES and ASCR to the SciDAC Partnership Center for High-Fidelity Boundary Plasma Simulation.
[1] C.S. Chang, S. Ku, R. Hager, R.M. Churchill et al., Phys. Plasmas 28, 022501 (2021); C.S. Chang, S. Ku, A. Loarte, V. Parail et al., Nucl. Fusion 57, 116023 (2017)
[2] M.D.J. Cole, A. Mishchenko, A. Bottino, and C.S. Chang, Phys. Plasmas 28, 034501 (2021)
[3] R. Hager, S. Ku, A.Y. Sharma, C.S. Chang et al., Phys. Plasmas 29, 112308 (2022)
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