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Träfflista för sökning "WFRF:(Kozulya M M) srt2:(2022)"

Sökning: WFRF:(Kozulya M M) > (2022)

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1.
  • Moiseyenko, Volodymyr, et al. (författare)
  • Plasma Production in ICRF in the Uragan-2M Stellarator in Hydrogen–Helium Gas Mixture
  • 2022
  • Ingår i: Journal of fusion energy. - : Springer. - 0164-0313 .- 1572-9591. ; 41:2
  • Tidskriftsartikel (refereegranskat)abstract
    • Plasma production experiments in helium at Uragan-2M have been performed to investigate the role of the hydrogen minority in helium. The experiments presented here were carried on with a controlled minority hydrogen concentration. The hydrogen minority allowed one to increase plasma density more than three times as compared with pure helium. The obtained plasma density is highest for whole time of Uragan-2M operation. The developed scenario allowed to decrease the neutral gas pressure at which the plasma production is possible. This is a requirement for achieving regimes of plasma production with full ionization. Although the initial gas mixture 14%H2 + 86%He can be treated as optimum, there is no sensitive dependence on hydrogen minority concentration, which makes the scenario robust. This study, together with initial LHD experiments, confirm the prospects of target plasma production by ICRF waves for stellarator type machines.
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2.
  • KOVTUN, Yurii V., et al. (författare)
  • ICRF Plasma Production with the W7-X Like Antenna in the Uragan-2M Stellarator
  • 2022
  • Ingår i: Plasma and Fusion Research. - : Japan Society of Plasma Science and Nuclear Fusion Research. - 1880-6821. ; 17:0
  • Tidskriftsartikel (refereegranskat)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 Ne ∼ 1013 cm−3 was observed at frequencies the fundamental harmonic of the hydrogen cyclotron frequency.
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