Modelling of plasma-edge and plasma–wall interaction physics at JET with the metallic first-wall

Abstract

An overview is given on the recent progress on edge modelling activities for the JET ITERlike wall using the computational tools like the SOLPS or EDGE2D-EIRENE code. The validation process of these codes on JET with its metallic plasma-facing components is an important step towards predictive studies for ITER and DEMO in relevant divertor operational conditions, i.e., for detached, radiating divertors. With increased quantitative credibility in such codes more reliable input to plasma-wall and plasma-material codes can be warranted, which in turn results in more realistic and physically sound estimates of the lifetime expectations and performance of a Be first-wall and a W-divertor, the same materials configuration foreseen for ITER. A brief review is given on the recent achievements in the plasma-wall interaction and material migration studies. Finally, a short summary is given on the availability and development of integrated codes to assess the performance of an JET-ILW baseline scenario also in view of the preparation for a JET DT-campaign.

Numerical simulation of the initial stage of unipolar arcing in fusion-relevant conditions

“…Many dedicated experiments and numerical simulations have been performed to study the behavior of tungsten in response to ELMs and ELM-like transient heat loads, [6,[12][13][14][15][16][17][18][19][20][21][22][23]. As far as unipolar arcs are concerned, of particular interest is the work [14], which reports a direct experimental observation of a unipolar arc ignited in a stationary plasma.…”

Image mapping the temporal evolution of edge characteristics in tokamaks using neural networks

“…The scrape off layer plasma simulator (SOLPS) is a state of the art code framework used to model the edge transport and study the plasma surface interactions. The SOLPS-ITER version which has been used in this research, is the basis of design of the divertor in ITER, as well as in simulating detachment and studying the plasma-wall interactions [8][9][10]. Edge modeling in SOLPS is performed by two sub codes within the framework : B2.5 and EIRENE [11].…”