1. Department of Mechanical Engineering, University of Rochester 1 , Rochester, New York 14620, USA
2. Laboratory for Laser Energetics 2 , 250 East River Rd., Rochester, New York 14623, USA
3. Department of Chemistry, University of Rochester 3 , Rochester, New York 14611, USA
4. Department of Earth and Planetary Science, University of California Berkeley 4 , Berkeley, California 94720, USA
5. Lawrence Livermore National Laboratory 5 , 7000 East Avenue, Livermore, California 94550, USA