M. J. V. Streeter^1,7, R. J. Shalloo^1,8, O. Vasilovici², C. Ballage², S. J. D. Dann⁹, C. D. Murphy⁴, Z. Najmudin¹, S. Dobosz Dufrénoy¹⁰, O. Lundh⁶, and B. Cros²

• ¹The John Adams Institute for Accelerator Science, Imperial College, London, SW7 2BZ, United Kingdom
• ²LPGP, CNRS, 91405, Orsay, France
• ³Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow, G1 1RD, United Kingdom
• ⁴York Plasma Institute, School of Physics, Engineering and Technology, University of York, Heslington, York, YO10 5DD, United Kingdom
• ⁵ENEA, Nuclear Department—C. R. Frascati, Via Enrico Fermi 45, 00044, Frascati, Italy
• ⁶Department of Physics, Lund University, Lund SE-221 00, Sweden
• ⁷School of Mathematics and Physics, Queen’s University Belfast, Belfast BT7 1NN, United Kingdom
• ⁸Deutsches Elektronen-Synchrotron DESY, D-22607 Hamburg, Germany
• ⁹Central Laser Facility, Rutherford Appleton Laboratory, Didcot, OX11 0QX, United Kingdom
• ¹⁰LIDYL, Université Paris Saclay, CEA, Saclay, France

• ^*Contact author: michael.backhouse13@imperial.ac.uk