On the role of runaway electrons in stimulating the RF breakdown and plasma formation in torsatrons Uragan-3M, Uragan-2M - I. K. Tarasov; M. I. Tarasov; V. B. Korovin; D. A. Sitnikov; E. L. Sorokovoy; A. V. Lozin; V. S. Romanov; R. O. Pavlichenko; N. V. Zamanov (Ukrainian Journal of Physics, 2022)