Determination of radial electric field from Pfirsch–Schlüter flows in the HSX stellarator
| Autor: | F.S.B. Anderson, Konstantin Likin, S. T. A. Kumar, Joseph Talmadge, David G. Anderson, T. J. Dobbins |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Nuclear and High Energy Physics media_common.quotation_subject Radius Plasma Condensed Matter Physics 01 natural sciences Asymmetry 010305 fluids & plasmas law.invention Computational physics Flow (mathematics) Physics::Plasma Physics law Electric field 0103 physical sciences Mean flow 010306 general physics Stellarator Beam (structure) media_common |
| Zdroj: | Nuclear Fusion. 57:036030 |
| ISSN: | 1741-4326 0029-5515 |
| Popis: | Inboard/outboard asymmetry in the impurity ion parallel flow is observed in the HSX stellarator using charge exchange recombination spectroscopy (CHERS). This observation shows the presence of counter-streaming Pfirsch–Schluter flow predicted by neoclassical theory. The asymmetry of the flow is used to calculate the magnitude and direction of the radial electric field (E r), as well as the mean flow, using computed magnetic geometry factors. This method enables calculation of E r near the core of the HSX plasma where the E r obtained from the radial force balance equation has large uncertainties due to the relatively large width of the diagnostic neutral beam with respect to the plasma minor radius. |
| Databáze: | OpenAIRE |
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