A seminar given by
Dr. Ghassan ANTAR
Professor at the American University of Beirut (Lebanon)
The Suppression of large-scale turbulence in the Tokamak Scrape-off Layer
Abstract: Reducing and controlling turbulence at the edge of magnetic fusion devices have been the paradigm of fundamental and applied research for several decades in magnetic fusion. We show that when using radio-frequency waves to heat or drive the current in the plasma, turbulence is reduced and large scales are suppressed. This effect is now confirmed on many tokamaks and is shown to affect the whole scrape-off layer, which indicates that the wave affects the source of the instability. The mechanism by which this interaction takes place is shown to be the excitation by ‘sound waves’ that couple to the turbulent fluctuations.
Photodissociation spectroscopy: a tool for probing biomolecules excited states properties