1. MIT - Plasma Science and Fusion Center 1 , Cambridge, Massachusetts 02139, USA
2. University of California, San Diego 2 , La Jolla, California 92093, USA
3. General Atomics 3 , P.O. Box 85608, San Diego, California 92186, USA
4. Proxima Fusion 4 , Munich 81671, Germany
5. University of Wisconsin, Madison 5 , Madison, Wisconsin 53715, USA
6. University of California, Los Angeles 6 , Los Angeles, California 90095, USA