Improved EDGE2D-EIRENE simulations of JET ITER-like wall L-mode discharges utilising poloidal VUV/visible spectral emission profiles

TitleImproved EDGE2D-EIRENE simulations of JET ITER-like wall L-mode discharges utilising poloidal VUV/visible spectral emission profiles
Publication TypeJournal Article
Year of Publication2015
AuthorsK.D Lawson, M. Groth, daSilva Ares P. Belo, S. Brezinsek, G. Corrigan, A. Czarnecka, E. Delabie, P. Drewelow, D. Harting, I. Książek, C.F Maggi, C. Marchetto, A.G Meigs, S. Menmuir, M.F Stamp, S. Wiesen
JournalJournal of Nuclear Materials
Volume463
IssueAug
Number8
Pagination582 - 585
Abstract

A discrepancy in the divertor radiated powers between EDGE2D-EIRENE simulations, both with and without drifts, and JET-ILW experiments employing a set of NBI-heated L-mode discharges with step-wise density variation is investigated. Results from a VUV/visible poloidally scanning spectrometer are used together with bolometric measurements to determine the radiated power and its composition. The analysis shows the importance of D line radiation in contributing to the divertor radiated power, while contributions from D radiative recombination are smaller than expected. Simulations with W divertor plates underestimate the Be content in the divertor, since no allowance is made for Be previously deposited on the plates being re-eroded. An improved version of EDGE2D-EIRENE is used to test the importance of the deposited layer in which the sputtering yield from supposed pure Be divertor plates is reduced to match the spectroscopic signals, while keeping the sputtering yield for the Be main chamber walls unchanged.

URLhttp://www.iop.org/Jet/fulltext/EFDC140125.pdf
DOI10.1016/j.jnucmat.2014.11.111
Division

FP

Department

PDG

PIDfb05078d36ef0c0a857ddb6771b52f1e
Alternate TitleJ. Nucl. Mater.
LabelOA

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