Experimental test of damping models for n = 1 toroidal Alfvén eigenmodes in JET

The damping rate of the n = 1 toroidal Alfven eigenmodes (TAE) mode in Ohmic-heated JET plasmas has been measured and compared with the prediction of the kinetic NOVA-K code, which includes electron and ion Landau damping of the global shear-Alfven wave field, collisional damping, and radiative damp...

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Veröffentlicht in:	Nuclear fusion 2003-06, Vol.43 (6), p.479-482
Hauptverfasser:	Testa, D, Fu, G.Y, Jaun, A, Fasoli, A, Sauter, O, contributors, JET-EFDA
Format:	Artikel
Sprache:	eng
Schlagworte:	Exact sciences and technology joint european torus Magnetic confinement and equilibrium Magnetohydrodynamic waves Magnetohydrodynamic waves (e.g., alfven waves) Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges tokamak plasmas Tokamaks waves Waves, oscillations, and instabilities in plasmas and intense beams
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Zusammenfassung:	The damping rate of the n = 1 toroidal Alfven eigenmodes (TAE) mode in Ohmic-heated JET plasmas has been measured and compared with the prediction of the kinetic NOVA-K code, which includes electron and ion Landau damping of the global shear-Alfven wave field, collisional damping, and radiative damping. It was found that the calculated damping rate is too small to account for the measured value under these experimental conditions. A relatively weak dependence of the damping rate on the normalized Larmor radius is observed experimentally.
ISSN:	0029-5515 1741-4326 1741-4326
DOI:	10.1088/0029-5515/43/6/310