1. Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
2. Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USA
3. Massachusetts Institute of Technology, 77 Massachusetts Avenue, NW16, Cambridge, Massachusetts 02139, USA
4. General Atomics, P.O. Box 85608, San Diego, California 93286-5608, USA
5. Diamond Materials GMBH, Hans-Bunte-Str. 19, 79108 Freiburg, Germany