Gas breakdown by a focused beam of THz wavesA.V. Sidorov, S.V. Razin, A.G. Luchinin, A.I. Tsvetkov, A.P. Fokin, D.S. Sidorov, A.P. Veselov, A.V. Vodopyanov and M.Yu. GlyavinEPJ Web Conf., 149 (2017) 02031DOI: https://doi.org/10.1051/epjconf/201714902031