Gas breakdown by a focused beam of THz waves A.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. Glyavin EPJ Web Conf., 149 (2017) 02031 Published online: 04 August 2017 DOI: 10.1051/epjconf/201714902031