1. Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
2. Department of Mechanical Engineering, University of Rochester, Rochester, New York 14623, USA
3. Department of Physics and Astronomy, University of Rochester, Rochester, New York 14623, USA
4. Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
5. General Atomics, San Diego, California 92121, USA