1. Cavendish Laboratory, Physics Department, University of Cambridge, Cambridge CB3 0HE, United Kingdom
2. ISIS Facility, STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Oxon OX11 0QX, United Kingdom
3. Swiss Light Source, Paul Scherrer Institut, Villigen PSI 5232, Switzerland
4. Department of Engineering, University of Cambridge, Cambridge CB3 0FA, United Kingdom