Detection and investigation of chirping Alfvén eigenmodes with heavy ion beam probe in the TJ-II stellarator

Detection and investigation of chirping Alfvén eigenmodes with heavy ion beam probe in the TJ-II stellarator

Alfvén eigenmodes were studied in the low magnetic shear flexible heliac TJ-II NBI-heated plasmas by heavy ion beam probe (HIBP), which is capable to measure simultaneously the oscillations of the plasma electric potential, density and poloidal magnetic field in the bulk plasmas. The L-mode hydrogen...

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Veröffentlicht in:Nuclear fusion 2018-08, Vol.58 (8), p.82019
Hauptverfasser: Melnikov, A.V., Ascasibar, E., Cappa, A., Castejón, F., Eliseev, L.G., Hidalgo, C., Khabanov, P.O., Kharchev, N.K., Kozachek, A.S., Krupnik, L.I., Liniers, M., Lysenko, S.E., de Pablos, J.L., Sharapov, S.E., Ufimtsev, M.V., Zenin, V.N.
Format: Artikel
Sprache:eng
Schlagworte:
Alfvén eigenmodes
chirping
TJ-II stellarator
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Zusammenfassung:Alfvén eigenmodes were studied in the low magnetic shear flexible heliac TJ-II NBI-heated plasmas by heavy ion beam probe (HIBP), which is capable to measure simultaneously the oscillations of the plasma electric potential, density and poloidal magnetic field in the bulk plasmas. The L-mode hydrogen plasma was investigated at various magnetic configurations with rotational transform ι(a)/2π ~ 1.5-1.6. Co-, counter- and balanced beam injection were explored. The present study was focused on the high-frequency chirping modes with 250 kHz  
ISSN:0029-5515
1741-4326
DOI:10.1088/1741-4326/aabcf8