Validation of EDGE2D-EIRENE and DIVIMP for W SOL transport in JET

Nuclear Materials and Energy

M. Groth¹  H.A. Kumpulainen²  G. Corrigan²  D. Harting³  M. Sertoli³  A.E. Jaervinen³  F. Koechl⁴  B. Lomanowski⁵  A.G. Meigs⁶ 

[1] Corresponding author.;Aalto University, P.O. Box 11000, FI-00076 AALTO, Finland;CCFE, Culham Science Centre, Abingdon, OX14 3DB, UK;Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, D-52425 Jülich, Germany;Lawrence Livermore National Laboratory, Livermore, CA 94550, USA;Oak Ridge National Laboratory, Oak Ridge, TN XYZNZ, USA;

关键词: Impurity transport;    Tungsten;    Scrape-off layer;    Code validation;    Joint European Torus;    Spectroscopy;   

DOI  :  

来源: DOAJ

【 摘 要 】

Tungsten sputtering rates and density profiles predicted using the edge plasma codes EDGE2D-EIRENE and DIVIMP are found to agree within a factor of 4 with measurements of neutral and singly-ionized W spectral line emission in the JET low-field side (LFS) divertor, and within a factor of 2 with SXR, VUV, and bolometric calculations of the W density in the main plasma. The edge plasma W predictions are extended to the core plasma using JINTRAC integrated core-edge modelling. Prompt redeposition of W is identified as the primary reason for the discrepancy between predicted and measured W emission in the divertor. The studied plasmas include attached divertor conditions in L-mode and type-I ELMy H-mode plasmas typical for JET.To more accurately reproduce the spectroscopically inferred W sputtering rates in EDGE2D-EIRENE, imposing the experimentally observed Be concentration of order 0.5% in the divertor is necessary. However, the W density in the main plasma is predicted to be insensitive to whether or not W is sputtered by Be at the divertor targets. Instead, the majority of the predicted core W originated in L-mode from sputtering due to fast D charge-exchange atoms at the W-coated tiles above the LFS divertor, and in H-mode due to D and W ions at the targets during ELMs.

【 授权许可】

Unknown