Theoretical simulation of the picosecond runaway-electron beam in coaxial diode filled with SF6 at atmospheric pressureAndrey Kozyrev, Vasily Kozhevnikov, Mikhail Lomaev, Dmitry Sorokin, Natalia Semeniuk and Victor TarasenkoEPL, 114 4 (2016) 45001DOI: https://doi.org/10.1209/0295-5075/114/45001