The article presents experimental and theoretical investigations on the dynamics of sawteethand neoclassical tearing modes in tokamak plasmas. The main ndings of these investigationsare: (1) The experimental validation, on the basis of FTU and TCV data, of a model for the predictionof the sawtooth period and amplitude; (2) the importance of diamagnetic e ects in determiningthe threshold for sawtooth crashes and the rotation of non-linear tearing modes; (3) a clari cation ofcollisionless reconnection processes, in particular the role of phase mixing in association with magneticisland growth and saturation in dissipationless regimes. The interplay between ECRH and macroscopicisland dynamics is also discussed.
Modelling of macroscopic magnetic islands in tokamaks
Grasso D;
2001
Abstract
The article presents experimental and theoretical investigations on the dynamics of sawteethand neoclassical tearing modes in tokamak plasmas. The main ndings of these investigationsare: (1) The experimental validation, on the basis of FTU and TCV data, of a model for the predictionof the sawtooth period and amplitude; (2) the importance of diamagnetic e ects in determiningthe threshold for sawtooth crashes and the rotation of non-linear tearing modes; (3) a clari cation ofcollisionless reconnection processes, in particular the role of phase mixing in association with magneticisland growth and saturation in dissipationless regimes. The interplay between ECRH and macroscopicisland dynamics is also discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
