1. Department of Mechanical Engineering, Texas A&M University, College Station, Texas 77843-3123, United States
2. Institute
of Physics, Polish Academy of Sciences,
al. Lotników32/46,
02-668, Warsaw, Poland
3. Advanced
Light Source, Lawrence Berkeley National Laboratory, Berkeley, California
94720, United States
4. Lawrence Livermore National Laboratory, Physical & Life Sciences Directorate, Condensed Matter & Materials Division, Livermore, California 94550, United States