1. Intense Laser Irradiation Laboratory at INO, CNR, Pisa, Italy
2. Physics Department, University of York, York, United Kingdom
3. Lawrence Livermore National Laboratory, Livermore, California 94550, USA
4. Imperial College London, London, United Kingdom
5. Physics Department, University of Oxford, Oxford, United Kingdom
6. INFN, Sezione di Pisa, Pisa, Italy
7. University of Rome Tor Vergata, Rome, Italy
8. Physics Department, Queens University Belfast, Belfast, United Kingdom
9. Rutherford Appleton Laboratory, STFC, Didcot, United Kingdom