Transient transport phenomena induced by cold pulses in W7-AS
- 1 September 1998
- journal article
- Published by IOP Publishing in Plasma Physics and Controlled Fusion
- Vol. 40 (9) , 1661-1672
- https://doi.org/10.1088/0741-3335/40/9/009
Abstract
Cold-pulse experiments were carried out in the W7-AS stellarator for the 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 the plasma centre could be modelled with a local parameter-dependent electron heat diffusivity. Unlike in tokamaks, non-local transport effects were not observed in these experiments.Keywords
This publication has 6 references indexed in Scilit:
- A comparative study of transport in stellarators and tokamaksPlasma Physics and Controlled Fusion, 1998
- Fast transport changes and power degradation in the W7-AS stellaratorPlasma Physics and Controlled Fusion, 1996
- An experimental counter-example to the local transport paradigmPhysics of Plasmas, 1995
- Transient electron heat diffusivity obtained from trace impurity injection on TFTRNuclear Fusion, 1994
- Transport in toroidal devices-the experimentalist's viewPlasma Physics and Controlled Fusion, 1993
- Initial operation of the Wendelstein 7AS advanced stellaratorPlasma Physics and Controlled Fusion, 1989