Linear and non-linear dynamics of Alfvén eigenmodes in tokamaksFunded under: EAEC-FUSION 12C
Linear and non-linear dynamics of various toroidicity induced global Alfvén eigenmodes are investigated by means of an initial value numerical code. The code uses the reduced magnetohydrodynamic (MHD) model expanded to the third order in the inverse aspect ratio parameter. Non-linear saturation is shown to occur due to the excitation of a perturbation to the non-linear mode structure, which dissipates energy on very short scales. The non-linear saturation of the toroidal Alfvén eigenmodes (TAE) and of the resistive periodic shear Alfvén eigenmodes (RPSAE) due to MHD non-linearities is investigated and compared with analytical predictions.
Bibliographic Reference: Report: RT/ERG/FUS/94/16 EN (1994) 72 pp.
Availability: Available from Servizio Studi e Documentazione, ENEA, Centro Ricerche Energia Frascati, C.P. 65-00044 Frascati, Roma (IT)
Record Number: 199510816 / Last updated on: 1995-07-17
Original language: en
Available languages: en