Experimental Study and Simulation of W7-AS Transient MHD Modes
Paper i proceeding, 2007

Transient MHD modes present in pure ECRH W7-AS plasmas have been shown to be in correlation with transient transport events (ELM-like modes). Here the spatial structure of the individual transients is analyzed using short-time Fourier transform and continuous analytical wavelet transform based techniques. Processing of Mirnov coil data partly confirms the properties derived from earlier, simpler analyses. Theoretical explanation of the properties of these modes (spatial structure and rapid damping) is attempted by models based involving drift-Alfvén turbulence or shear Alfvén waves.


Gergö Pokol

Chalmers, Institutionen för radio- och rymdvetenskap, Icke-linjär elektrodynamik

G. Papp

G. Por

S. Zoletnik

A. Weller

W7-AS team

AIP Conference Proceedings

0094-243X (ISSN) 1551-7616 (eISSN)

Vol. 993 215-218


Fusion, plasma och rymdfysik