Syntolkning: Illustration av en graf
​Light emission by a diagnostic Sodium beam at the edge of the plasma showing filament activity.​​

Filamentary turbulence (blobs) in the Wendelstein 7-X stellarator

Seminar by Sandor Zoletnik, Wigner Research Center for Physics, Budapest, Hungary


Filaments or blobs are well known phenomena at the edge of tokamak plasmas. They represent a plasma filament detaching from the edge and propagating through the Scrape Off Layer (SOL) due to polarisation caused ExB drift. In the SOL filaments are the major cross-field transport mechanism. On the Wendelstein 7-X stellarator similar features have been seen from the first experiments and they seem to play an important role in the edge-SOL transport. In the standard configuration of this 3D device the edge is defined by a chain of magnetic islands, therefore the situation is much more complex than  in a tokamak. The talk presents multi-diagnostic observation of filaments, their response to changes in magnetic configuration and edge plasma conditions.
Category Seminar; Lecture
Location: PJ, lecture hall,
Starts: 19 December, 2018, 10:00
Ends: 19 December, 2018, 11:00

Published: Thu 08 Nov 2018. Modified: Mon 12 Nov 2018