1. Institute for Nuclear Research, Russian Academy of Sciences, 60-Letiya Oktiabria 7a, 117312 Moscow, Russia
2. Institute of High Pressure Physics, Russian Academy of Sciences, 142190 Troitsk, Russia
3. National University of Science and Technology MISiS, Leninsky prosp. 4, Moscow, 119049, Russia. E-mail: rsadykov@inr.ru
4. Faculty of Science, Delft University of Technology, Mekelweg 15, 2629 JB Delft, The Netherlands. E-mails: c.pappas@tudelft.nl, l.j.bannenberg@tudelft.nl
5. ISIS Facility, STFC, Rutherford Appleton Laboratory, Oxfordshire, Oxon OX11 OQX Didcot, UK. E-mails: robert.dalgliesh@stfc.ac.uk, chris.goodway@stfc.ac.uk
6. Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France. E-mails: falus@ill.eu, lelievre@ill.eu