1. AWE plc, Aldermaston, Reading RG7 4PR, United Kingdom
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
3. Kentech Instruments Ltd., Wallingford OX10 8BD, United Kingdom
4. Photek Ltd., St Leonards-on-Sea TN38 9NS, United Kingdom
5. General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA