Comparison of DIVIMP and EDGE2D-EIRENE tungsten transport predictions in JET edge plasmas

Nuclear Materials and Energy

M. Groth¹  H.A. Kumpulainen²  M. Fontell²  A.E. Jaervinen²  D. Harting³  G. Corrigan⁴ 

[1] Corresponding author.;Aalto University, P.O. Box 11000, FI-00076 AALTO, Finland;CCFE, Culham Science Centre, Abingdon OX14 3DB, UK;Lawrence Livermore National Laboratory, Livermore, CA 94550, USA;

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

DOI  :  

来源: DOAJ

【 摘 要 】

The average tungsten concentrations in the pedestal region (cW) predicted by the Monte Carlo code DIVIMP and the coupled multi-fluid plasma/kinetic neutral code EDGE2D-EIRENE are found to agree within a factor of 2 for a range of JET-ILW L-mode and H-mode plasma conditions. Under attached divertor conditions with cW exceeding 10−6, the cW predicted by DIVIMP is consistently ~50% higher than by EDGE2D-EIRENE. In colder plasma scenarios with cW <10-6, stochastic variations exceed the systematic disagreement between the two codes. The average tungsten charge predicted by EDGE2D-EIRENE in the upstream scrape-off layer is lower by 40–50% due to the bundling of the 74 tungsten ion charge states into 6 fluid species, which explains the reduced tungsten accumulation in the main plasma compared to the DIVIMP predictions.

【 授权许可】

Unknown