1. Lawrence Livermore National Laboratory, Livermore, California 94550, USA
2. SLAC National Accelerator Laboratory, 2575 Sand Hill Road, MS 19, Menlo Park, California 94025, USA
3. General Atomics, San Diego, California 92186, USA
4. Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
5. Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA