1. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
2. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
3. University of California, Irvine, California 92697, USA
4. Plasma Science and Fusion Center, MIT, Massachusetts 02139, USA
5. University of Minnesota, Minnesota 55455, USA
6. General Atomics, San Diego, California 92186, USA
7. CompX, Del Mar, California 92014, USA