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ICRF production of plasma with hydrogen minority in Uragan-2M stellarator by two-strap antenna
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- Kovtun, Yurii (författare)
- Kharkiv Inst Phys & Technol, Inst Plasma Phys, Natl Sci Ctr, UA-61108 Kharkiv, Ukraine.
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- Moiseenko, Vladimir (författare)
- Uppsala universitet,Elektricitetslära,Kharkiv Inst Phys & Technol, Inst Plasma Phys, Natl Sci Ctr, UA-61108 Kharkiv, Ukraine
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- Lozin, Oleksiy (författare)
- Kharkiv Inst Phys & Technol, Inst Plasma Phys, Natl Sci Ctr, UA-61108 Kharkiv, Ukraine.
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- Kharkiv Inst Phys & Technol, Inst Plasma Phys, Natl Sci Ctr, UA-61108 Kharkiv, Ukraine Elektricitetslära (creator_code:org_t)
- American Institute of Physics (AIP), 2024
- 2024
- Engelska.
- Ingår i: Physics of Plasmas. - : American Institute of Physics (AIP). - 1070-664X .- 1089-7674. ; 31:4
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- The experiments on medium-size stellarator Uragan-2M (U-2M) in Kharkiv, Ukraine, are carried on in support of the Wendelstein 7-X (W7-X) experimental program. The scenario ion cyclotron frequency range (ICRF) plasma production at the hydrogen minority regime had been experimentally tested on U-2M and was qualified at the Large Helical Device (LHD). The paper presents the results of further research on the ICRF plasma production. The ICRF discharge studies were carried out in a H2 + He mixture with a controlled hydrogen concentration ranging from few percents to 75%. The two-strap like antenna mimicks the W7-X antenna operated in monopole phasing. The applied RF power was in the range of ∼100 kW. Relatively dense plasma of up to Ne ∼ 1019 m−3 was produced near the first harmonic of the hydrogen cyclotron frequency. The maximum temperature of the electrons and ions was not more than a few tens of electron volt. The characteristic features of RF plasma production and the propagation of electromagnetic waves in the experimental conditions are discussed. The experiments on U-2M and LHD indicate that the minority scenario of ICRF plasma production appears to be scalable and could be used in large stellarator machines. This is, in particular, important for the future experiments ICRF production of target plasma in W-7X in conditions where electron cyclotron resonance heating start-up is not possible.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
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