Archivio Istituzionale della RicercaThe article presents experimental and theoretical investigations on the dynamics of sawteeth and neoclassical tearing modes in tokamak plasmas. The main findings of these investigations are: (1) The experimental validation, on the basis of FTU and TCV data, of a model for the prediction of the sawtooth period and amplitude; (2) the importance of diamagnetic effects in determining the threshold for sawtooth crashes and the rotation of non-linear tearing modes; (3) a clarification of collisionless reconnection processes, in particular the role of phase mixing in association with magnetic island growth and saturation in dissipationless regimes. The interplay between ECRH and macroscopic island dynamics is also discussed.
Modelling of macroscopic magnetic islands in tokamaks / Porcelli, Francesco; Airoldi, A.; Angioni, C.; Bruschi, A.; Buratti, P.; Califano, F.; Cirant, S.; Furno, I.; Grasso, D.; Lazzaro, E.; Martynov, A. A.; Ottaviani, M.; Pegoraro, F.; Ramponi, G.; Rossi, E.; Sauter, O.; Tebaldi, Claudio; Tudisco, O.. - In: NUCLEAR FUSION. - ISSN 0029-5515. - 41:3(2001), pp. 1207-1218. [10.1088/0029-5515/41/9/309]
Modelling of macroscopic magnetic islands in tokamaks
PORCELLI, Francesco;D. GRASSO;TEBALDI, CLAUDIO;
2001
Abstract
The article presents experimental and theoretical investigations on the dynamics of sawteeth and neoclassical tearing modes in tokamak plasmas. The main findings of these investigations are: (1) The experimental validation, on the basis of FTU and TCV data, of a model for the prediction of the sawtooth period and amplitude; (2) the importance of diamagnetic effects in determining the threshold for sawtooth crashes and the rotation of non-linear tearing modes; (3) a clarification of collisionless reconnection processes, in particular the role of phase mixing in association with magnetic island growth and saturation in dissipationless regimes. The interplay between ECRH and macroscopic island dynamics is also discussed.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
https://hdl.handle.net/11583/1404268
Attenzione
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo