Physics of plasma burn-through and DYON simulations for the JET ITER-like wall
Abstract
This paper presents the DYON simulations of the plasma burn-through phase at Joint European Torus (JET) with the ITER-like wall. The main purpose of the study is to validate the simulations with the ITER-like wall, made of beryllium. Without impurities, the burn-through process of a pure deuterium plasma is described using DYON simulations, and the criterion for deuterium burn-through is derived analytically. The plasma burn-through with impurities are simulated using wall-sputtering models in the DYON code, which are modified for the ITER-like wall. The wall-sputtering models and the validation against JET data are presented. The impact of the assumed plasma parameters in DYON simulations are discussed by means of parameter scans. As a result, the operation space of prefill gas pressure and toroidal electric field for plasma burn-through in JET is compared to the Townsend avalanche criterion.
Cite
@article{arxiv.1309.4890,
title = {Physics of plasma burn-through and DYON simulations for the JET ITER-like wall},
author = {Hyun-Tae Kim and A. C. C. Sips and EFDA-JET contributors},
journal= {arXiv preprint arXiv:1309.4890},
year = {2013}
}
Comments
34 pages, 13 figures