1. Plasma Physics Department, Soreq NRC, Yavne 81800, Israel
2. Lawrence Livermore National Laboratory, Livermore, California 94551, USA
3. Clarendon Laboratory–University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
4. Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications (CELIA), UMR 5107, F-33405 Talence, France