Causes for the two stages of the disruption energy quench
The energy quench of tokamak disruptions takes place in two stages separated by a plateau period. The total quench duration is thought to be a combination of Alfvén and magnetic diffusion times. This paper gives an overview of the theoretical models employed in the research and compares the results with new experimental evidence. The evolution of the density distribution during the two phases can be followed using the interferometer at TEXTOR. An 18-channel fast interferometer next to a 4-channel pulse radar reflectometer makes it possible to investigate the density profile evolution with both good time (2 mu-s) and spatial resolution. A fast 20-channel ECE-heterodyne radiometer and a 5-camera SXR system can be employed to follow the temperature profile evolution.
Bibliographic Reference: Article: 21st EPS Conference on Controlled Fusion and Plasma Physics, Montpellier, 27 June - 1 July, 1994, Vol. 18B (1994) Part I, pp. 230-233
Record Number: 199510177 / Last updated on: 1995-02-07
Original language: en
Available languages: en