Density limits and evolution of disruptions in ohmic TEXTOR plasmas
- 1 April 1992
- journal article
- Published by IOP Publishing in Nuclear Fusion
- Vol. 32 (4) , 645-654
- https://doi.org/10.1088/0029-5515/32/4/i09
Abstract
Density limits and the evolution of disruptions were studied on TEXTOR for different wall materials facing the plasma surface. A systematic extension of the density limit was found over a large current range when the metallic wall was first exchanged by a carbon coated wall and later by a boron-carbon coated wall. The maximum attainable density nearly doubled when metallic impurities were replaced by low Z impurities such as boron and carbon. With a neutral beam additional heating power of PNI=3.2 MW, average densities exceeding ne=1020 m-3 were obtained. The maximum density observed scales like the square root of the auxiliary heating power. The sequence of processes leading to a density limit disruption was experimentally analysed in detail for ohmically heated plasmasKeywords
This publication has 15 references indexed in Scilit:
- Wall locking and density limit disruptionsNuclear Fusion, 1989
- Boronization in textorJournal of Nuclear Materials, 1989
- Disruptions in JETNuclear Fusion, 1989
- The dynamic behaviour of the electron temperature profile in the TEXTOR Tokamak plasmaPlasma Physics and Controlled Fusion, 1989
- A new look at density limits in tokamaksNuclear Fusion, 1988
- Review of MARFE phenomena in tokamaksJournal of Nuclear Materials, 1987
- Origin of low Z impurities in TEXTOR with an “all carbon” surroundingJournal of Nuclear Materials, 1987
- Properties, control and ICR-heating of the plasma in TEXTORPlasma Physics and Controlled Fusion, 1986
- A linear model for the tearing mode of a tokamak plasma with flow and a resistive wall boundary conditionJournal of Plasma Physics, 1983
- Some observations on maximum densities in tokamak experimentsNuclear Fusion, 1976