1. Institute
for Combustion Technology, RWTH, Templergraben 64, Aachen 52056, Germany
2. Department
of Mechanical Engineering, Carnegie Mellon University, 5000 Forbes
Avenue, Pittsburgh, Pennsylvania 15213, United States
3. SUNCAT, SLAC National Accelerator
Laboratory, 2575 Sand
Hill Road, Menlo
Park, California 94025-7015, United States