1. Centre for Plasma Physics, School of Mathematics and Physics, Queen’s University Belfast, BT7 1NN, Belfast, UK
2. National Centre for Plasma Science and Technology, School of Physical Sciences, Dublin City University, Dublin, Republic of Ireland
3. School of Biological Sciences, Queen’s University Belfast, BT9 7BL, Belfast, UK
4. Department of Physics, Swansea University, SA2 8PP, Swansea, UK
5. STFC Rutherford Appleton Laboratory, OX11 0QX, Didcot, Oxon, UK
6. Center for Free‐Electron Laser Science, DESY, Notkestrasse 85, 22607, Hamburg, Germany