1. ELI Beamlines facility, The Extreme Light Infrastructure ERIC, Za Radnicí 835, 252 41 Dolní Břežany, Czech Republic
2. Attohallen Facility, University of Gothenburg, Department of Physics, Origovgen 6B, SE-412 58 Gothenburg, Sweden
3. Technical University of Applied Sciences, Hochschulring 1, 15745 Wildau, Germany