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Dynamic modelling of local fuel inventory and desorption in the whole tokamak vacuum vessel for auto-consistent plasma-wall interaction simulations
CEA, IRFM, F-13108 St Paul Les Durance, France.;CEA, IRFM, F-13108 St Paul Les Durance, France..
KTH, School of Electrical Engineering and Computer Science (EECS), Electrical Engineering, Fusion Plasma Physics.
KTH, School of Electrical Engineering and Computer Science (EECS), Electrical Engineering, Fusion Plasma Physics.
KTH, School of Electrical Engineering and Computer Science (EECS), Electrical Engineering, Fusion Plasma Physics.
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Number of Authors: 12322019 (English)In: Nuclear Materials and Energy, E-ISSN 2352-1791, Vol. 19, p. 550-557Article in journal (Refereed) Published
Abstract [en]

An extension of the SolEdge2D-EIRENE code package, named D-WEE, has been developed to add the dynamics of thermal desorption of hydrogen isotopes from the surface of plasma facing materials. To achieve this purpose, D-WEE models hydrogen isotopes implantation, transport and retention in those materials. Before launching autoconsistent simulation (with feedback of D-WEE on SolEdge2D-EIRENE), D-WEE has to be initialised to ensure a realistic wall behaviour in terms of dynamics (pumping or fuelling areas) and fuel content. A methodology based on modelling is introduced to perform such initialisation. A synthetic plasma pulse is built from consecutive SolEdge2D-EIRENE simulations. This synthetic pulse is used as a plasma background for the D-WEE module. A sequence of plasma pulses is simulated with D-WEE to model a tokamak operation. This simulation enables to extract at a desired time during a pulse the local fuel inventory and the local desorption flux density which could be used as initial condition for coupled plasma-wall simulations. To assess the relevance of the dynamic retention behaviour obtained in the simulation, a confrontation to post-pulse experimental pressure measurement is performed. Such confrontation reveals a qualitative agreement between the temporal pressure drop obtained in the simulation and the one observed experimentally. The simulated dynamic retention during the consecutive pulses is also studied.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 19, p. 550-557
Keywords [en]
Plasma-wall interaction simulation, Recycling, Dynamics of hydrogen isotopes thermal desorption, Dynamic retention, Edge plasma physics
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-270844DOI: 10.1016/j.nme.2019.03.019ISI: 000470746100086Scopus ID: 2-s2.0-85066471831OAI: oai:DiVA.org:kth-270844DiVA, id: diva2:1415071
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QC 20200317

Available from: 2020-03-17 Created: 2020-03-17 Last updated: 2020-05-11Bibliographically approved

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