1. H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, UK.
2. Laboratoire National des Champs Magnétiques Intenses, CNRS-INSA-UJF-UPS, 31400 Toulouse, France.
3. AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, aleja Adama Mickiewicza 30, 30-059 Krakow, Poland.
4. High Field Magnet Laboratory (HFML-EMFL), Radboud University, Toernooiveld 7, 6525 ED Nijmegen, Netherlands.