1. Laboratory for Neutron and Muon Instrumentation (LIN), Paul Scherrer Institute, 5232 Villigen, PSI, Switzerland
2. NVision Imaging Technologies GmbH, 89081 Ulm, Germany
3. Francis Bitter Magnet Laboratory and Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
4. Quantum Technology Center, University of Maryland, College Park, Maryland 20742, United States