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approvedposter.pdf2017-05-12 12:01:45Syun'ichi Shiraiwa

Abstracts

Author: Syun'ichi Shiraiwa
Requested Type: Poster
Submitted: 2017-03-17 14:46:59

Co-authors: J. C. Wright

Contact Info:
PSFC, MIT
77 Massachusett ave.
Cambridge, MA   02139
USA

Abstract Text:
Extending core ICRF wave simulation to include realistic SOL plasmas using FEM*
S. Shiraiwa, and J. C. Wright

TORIC core spectral ICRF solver was extended to include realistic SOL plasmas and a complicated antenna structure. The edge region is represented using the finite element discretization (TORIC x Triangulation of Outer Region for IC waves: TORIC2 ). In order to incorporate the physically correct connection between core spectral representation of RF electric field to the edge FEM, we partition the entire computation domain into two sub-domains: a core and an edge region. Simulations in each domain are performed separately with appropriate numerical solvers. The domains are then joined together using the continuity boundary condition for the tangential electric and magnetic fields at their interfaces . The model developed here was tested using an ICRH H minority heating scenario on the Alcator C-Mod tokamak in 2D axisymmetric geometry, and the simulated pattern of core wave propagation agrees well with a standard TORIC simulation. An effort to extend the present work to include 3D RF antenna using MFEM (Modular FEM library)[3] will be presented.
[1] J. C. Wright and S. Shiraiwa, “Coupling an ICRF core spectral solver to an edge FEM code”, AIP Conference Proceedings number 1689, AIP Conference Proceedings, New York (2015)
[2] S. Shiraiwa et. al., “Integration of core/edge plasmas in fullwave RF simulation”, in Proc of 26th IAEA Fusion Energy Conference (Kyoto, 2016), TH/P4-27.
[3] http://mfem.org/
* Work supported by the U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences, using User Facility Alcator C-Mod, under Award Number DE-FC02-99ER54512 and by US DoE Contract No. DE-FC02-01ER54648 under a Scientific Discovery Through Advanced Computing Initiative.

Comments:
Computer Simulation of Plasmas