1. Lawrence Livermore National Laboratory, Livermore, California 94550, USA
2. University of California at San Diego, La Jolla, California 92093, USA
3. General Atomics, La Jolla, California 92093, USA
4. University of Oxford, Oxford OX1 3PU, United Kingdom
5. Institute of Laser Engineering, Osaka University, Suita 565-0871, Osaka, Japan
6. Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
7. Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA