Speaker
Syun'ichi Shiraiwa
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P4.1075.pdf
Development of RF wave simulation using the open source MFEM library
S. Shiraiwa1, J. C. Wright1, P. T. Bonoli1, T. Kolev2, J. Myra3 and M. Stowell2
1 MIT Plasma Science and Fusion Center, 190 Albany St Cambridge, 02139, USA
2 Center for Applied Scientific Computing, Lawrence Livermore National Laboratory,
Livermore, CA 94551, USA
3Lodestar Research Corporation, 2400 Central Avenue P-5, Boulder, CO 80301, USA
The finite element method (FEM) can handle complicated computational geometry and its
mathematical formulation is suitable for modeling cold plasma wave propagation, in which
the dielectric response to the RF electric field is local. Indeed, FEM has been widely used to
analyze the propagation of RF waves in antenna and edge regions [1]. One can readily
build such an RF wave simulation code nearly out-of-box, using the scalable open-source
FEM library MFEM (http://mfem.org) and Petra-M (Physics equation translator for
MFEM). This paper reports application of MFEM/Petra-M to model various types of RF
wave antennas including the field-aligned ICRF antenna on Alcator C-Mod, proposed DIII-
D HFS LHCD launcher, and capcacitivily coupled comb-line antenna for LHCD. MFEM/
Petra-M has been successfully coupled with the TORIC core spectrum solver to solve RF
wave problem in entire tokamak plasma poloidal cross-section self-consistently [2-4]. We
will also discuss including advanced physics models such as the mode-conversion to
Bernstein waves and RF rectified sheath BC [5].
[1] S. Shiraiwa et al., Physics of Plasmas 17, 056119 (2010)
[2] S. Shiraiwa, J. C. Wright, et al., Nucl. Fusion 57, 086048 (2017)
[3] J. Wright and S. Shiraiwa, EPJ Web of Conferences 157, 02011 (2017)
[4] S. Shiraiwa, J. C. Wright, et. al., EPJ Web of Conferences 157, 03048 (2017)
[5] H. Kohno and J.R. Myra Computer Physics Communications 220 (2017) 129–142
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 DE-SC0018090 under a Scientific Discovery
Through Advanced Computing Initiative. The work at Lawrence Livermore National
Laboratory was performed under the auspices of DoE under Contract DE-
AC52-07NA27344, LLNL-PROC-703397.
