MHD stability of optimized shear discharges in JET

MHD stability of optimized shear discharges in JET

The main limitation to the performance of JET optimized shear (OS) discharges is due to MHD instabilities, mostly in the form of a disruptive limit. The structure of the MHD mode observed as a precursor to the disruption, as measured from SXR and ECE diagnostics, shows a global ideal MHD mode. The m...

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Veröffentlicht in:Nuclear fusion 1999-11, Vol.39 (11), p.1489-1507
Hauptverfasser: Huysmans, G.T.A, Hender, T.C, Alper, B, Baranov, Yu.F, Borba, D, Conway, G.D, Cottrell, G.A, Gormezano, C, Helander, P, Kwon, O.J, Nave, M.F.F, Sips, A.C.C, Söldner, F.X, Strait, E.J, Zwingmann, W.P, Team, JET
Format: Artikel
Sprache:eng
Schlagworte:
Electric discharges
Magnetohydrodynamics
Plasma stability
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Beschreibung
Zusammenfassung:The main limitation to the performance of JET optimized shear (OS) discharges is due to MHD instabilities, mostly in the form of a disruptive limit. The structure of the MHD mode observed as a precursor to the disruption, as measured from SXR and ECE diagnostics, shows a global ideal MHD mode. The measured mode structure is in good agreement with the calculated mode structure of the pressure driven kink mode. The disruptions occur at relatively low normalized beta (1< beta sub(N)
ISSN:0029-5515
1741-4326
DOI:10.1088/0029-5515/39/11/301