ICRF Plasma Production with the W7-X Like Antenna in the Uragan-2M Stellarator

Abstract

The results of the plasma start-up with ICRH of U-2M RF discharges in H₂+He mixture with newly implemented controlled gas H₂ concentration are presented. The W7-X like ICRH antenna operated in monopole phasing with applied RF power of ∼ 100 kW. We investigated plasma start-up in the pressure range p = 6×10⁻⁴ - 9 × 10⁻² Pa. Plasma production with an average density of up to N_e ∼ 10¹³ cm⁻³ was observed at frequencies the fundamental harmonic of the hydrogen cyclotron frequency.