Abstract
Precise control of the shape and position of Double-Null divertor configurations in the TCV tokamak has been used to reliably trigger the transition from ELM-free to ELMy Ohmic H-Mode and back. Pre-programmed modulation of the magnetic axis height, with fixed shaping field, caused the plasma to evolve, during a single discharge, between Double-Null-Upper, Double-Null and Double-Null-Lower configurations, with both X-points remaining close to the last closed flux surface. The transition from ELM-free to ELMy and back again was observed to be synchronous with the configuration modifications. Using this method, several ELM-free and ELMy phases enabled reproducible disruption-free H-mode discharges in TCV lasting up to 1.5 seconds. The plasma density during a long-duration H-mode was directly controlled by feeding back onto the vertical height of the magnetic axis. (author) 4 figs., 18 refs.
Dutch, M J;
Hofmann, F;
Duval, B P;
Hirt, A;
Joye, B;
Lister, J B;
Martin, Y;
Nieswald, C;
Pochelon, A;
Weisen, H
[1]
- Ecole Polytechnique Federale, Lausanne (Switzerland). Centre de Recherche en Physique des Plasma (CRPP)
Citation Formats
Dutch, M J, Hofmann, F, Duval, B P, Hirt, A, Joye, B, Lister, J B, Martin, Y, Nieswald, C, Pochelon, A, and Weisen, H.
ELM control during double-null Ohmic H-modes in TCV.
Switzerland: N. p.,
1994.
Web.
Dutch, M J, Hofmann, F, Duval, B P, Hirt, A, Joye, B, Lister, J B, Martin, Y, Nieswald, C, Pochelon, A, & Weisen, H.
ELM control during double-null Ohmic H-modes in TCV.
Switzerland.
Dutch, M J, Hofmann, F, Duval, B P, Hirt, A, Joye, B, Lister, J B, Martin, Y, Nieswald, C, Pochelon, A, and Weisen, H.
1994.
"ELM control during double-null Ohmic H-modes in TCV."
Switzerland.
@misc{etde_10103990,
title = {ELM control during double-null Ohmic H-modes in TCV}
author = {Dutch, M J, Hofmann, F, Duval, B P, Hirt, A, Joye, B, Lister, J B, Martin, Y, Nieswald, C, Pochelon, A, and Weisen, H}
abstractNote = {Precise control of the shape and position of Double-Null divertor configurations in the TCV tokamak has been used to reliably trigger the transition from ELM-free to ELMy Ohmic H-Mode and back. Pre-programmed modulation of the magnetic axis height, with fixed shaping field, caused the plasma to evolve, during a single discharge, between Double-Null-Upper, Double-Null and Double-Null-Lower configurations, with both X-points remaining close to the last closed flux surface. The transition from ELM-free to ELMy and back again was observed to be synchronous with the configuration modifications. Using this method, several ELM-free and ELMy phases enabled reproducible disruption-free H-mode discharges in TCV lasting up to 1.5 seconds. The plasma density during a long-duration H-mode was directly controlled by feeding back onto the vertical height of the magnetic axis. (author) 4 figs., 18 refs.}
place = {Switzerland}
year = {1994}
month = {Sep}
}
title = {ELM control during double-null Ohmic H-modes in TCV}
author = {Dutch, M J, Hofmann, F, Duval, B P, Hirt, A, Joye, B, Lister, J B, Martin, Y, Nieswald, C, Pochelon, A, and Weisen, H}
abstractNote = {Precise control of the shape and position of Double-Null divertor configurations in the TCV tokamak has been used to reliably trigger the transition from ELM-free to ELMy Ohmic H-Mode and back. Pre-programmed modulation of the magnetic axis height, with fixed shaping field, caused the plasma to evolve, during a single discharge, between Double-Null-Upper, Double-Null and Double-Null-Lower configurations, with both X-points remaining close to the last closed flux surface. The transition from ELM-free to ELMy and back again was observed to be synchronous with the configuration modifications. Using this method, several ELM-free and ELMy phases enabled reproducible disruption-free H-mode discharges in TCV lasting up to 1.5 seconds. The plasma density during a long-duration H-mode was directly controlled by feeding back onto the vertical height of the magnetic axis. (author) 4 figs., 18 refs.}
place = {Switzerland}
year = {1994}
month = {Sep}
}