Abstract Details
Abstracts
Author: Rhea L Barnett
Requested Type: Poster
Submitted: 2023-04-02 17:25:55
Co-authors: J. D. Lore, C. Hauck, C. J. Vogl, M. Stowell, O. Burkovska, S. Schnake, L. Mu, B. Dudson
Contact Info:
ORNL
1 Bethel Valley Road
Oak Ridge, 37831
USA
Abstract Text:
Ion cyclotron resonance heating (ICRH) will play a critical role in both plasma heating and current drive in magnetically confined fusion devices. Robust delivery of power from the radio-frequency (RF) actuator core is essential, consequently requiring careful consideration of the coupled, nonlinear dynamics between the launched RF waves and the equilibrium transport profiles in the far scrape off layer (far-SOL). The high degree of anisotropy in the equilibrium transport properties of a magnetized plasma generally leads to using a background field aligned mesh to reduce numerical pollution. However, to accurately determine the RF fields close to the antenna requires a mesh with high geometric fidelity, which is at odds with the desired plasma meshing. Here we describe a new code to bridge this gap, MAPS. MAPS leverages the flexible meshing capabilities of MFEM to provide a mesh that describes both the plasma transport and the RF actuator, while mitigating numerical pollution using high order finite element methods. This work will show previous benchmarking and verification efforts for the diffusion dominated anisotropic heat transport, as well as introduce new verification efforts for the advection dominated regime. We also include discussion on future applications and code improvements.
This work was supported by the U.S. Department of Energy Scientific Discovery through Advanced Computing Initiative, Contract Number DE-AC05-00OR22725.
Comments: