1. A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Vavilova Street 38, Moscow 119991, Russian Federation
2. National Research Nuclear University MEPhI, Kashirskoe shosse 31, Moscow 115409, Russian Federation
3. M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russian Federation
4. 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Stuttgart D-70550, Germany