First experimental measurements of a new fast ion driven micro-burst instability in a field-reversed configuration plasma
| Autor: | Xiaokang Yang, Richard Magee, Toshiki Tajima, Y. Song, Wendell Horton, Sergey Korepanov, Ryan Clary, M. Tuszewski, Thomas Roche, Bihe Deng, M. C. Thompson, Sean Dettrick, Hiroshi Gota, Marco Onofri, Jon Douglass, M. Beall, Sergei Putvinski, Ales Necas, Artem Smirnov, A. Van Drie, Michl Binderbauer, Elena Belova, K. Zhai, E. Granstedt |
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| Rok vydání: | 2018 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Atmospheric-pressure plasma Biasing Plasma Condensed Matter Physics 01 natural sciences Instability Neutral beam injection Charged particle 010305 fluids & plasmas Ion Physics::Plasma Physics 0103 physical sciences Field-reversed configuration Atomic physics 010306 general physics |
| Zdroj: | Nuclear Fusion. 58:126026 |
| ISSN: | 1741-4326 0029-5515 |
| DOI: | 10.1088/1741-4326/aae5df |
| Popis: | In modern field-reversed configuration (FRC) experiments (Binderbauer et al 2015 Phys. Plasmas 22 056110) at TAE Technologies, classical FRC instabilities are suppressed by advanced neutral beam injection and edge biasing methods, leading to high plasma confinement and fast ion pressure built-up which is comparable to the bulk plasma pressure. In some of these high performance FRC plasmas, a new macroscopically non-destructive fast ion driven micro-burst instability is observed as periodic small amplitude bursts with frequency down chirping in the diamagnetic drift frequency range, repeating about every 0.1 to 0.5 ms. The occurrence of these micro-bursts and burst-free operation can be controlled by changing the injected neutral beam energy. Major observed characteristics of this new instability are presented. Possible explanation of the phenomenon is suggested. |
| Databáze: | OpenAIRE |
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