TRANSIENT TRANSPORT PHENOMENA INDUCED BY COLD PULSES IN W7-AS

Authors
WALTER H STROTH U BLEUEL J BURHENN R GEIST T GIANNONE L HARTFUSS H KOPONEN JPT LEDL L PEREVERZEV G
Citation
H. Walter et al., TRANSIENT TRANSPORT PHENOMENA INDUCED BY COLD PULSES IN W7-AS, Plasma physics and controlled fusion (Print), 40(9), 1998, pp. 1661-1672
Citations number
11
Categorie Soggetti
Phsycs, Fluid & Plasmas","Physics, Nuclear
Journal title
Plasma physics and controlled fusion (Print) → ACNP
ISSN journal
07413335
Volume
40
Issue
9
Year of publication
1998
Pages
1661 - 1672
Database
ISI
SICI code
0741-3335(1998)40:9<1661:TTPIBC>2.0.ZU;2-Z
Abstract
Cold-pulse experiments were carried out in the W7-AS stellarator for t he first time. Carbon was injected by a laser blow-off system into the plasma edge. The electron density increase due to the injected carbon is found to be responsible for the edge electron temperature drop. In all cases, the propagation of the edge temperature perturbation to th e plasma centre could be modelled with a local parameter-dependent ele ctron heat diffusivity. Unlike in tokamaks, non-local transport effect s were not observed in these experiments.