1. Institute for Advanced Computational Science, Stony Brook University, Stony Brook, New York 11749-5250, USA
2. Department of Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
3. Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
4. School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, USA
5. Department of Mechanical and Nuclear Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA