Tungsten divertor sources in WEST related to impurity inventory and local plasma conditions

TitleTungsten divertor sources in WEST related to impurity inventory and local plasma conditions
Publication TypeJournal Article
Year of Publication2020
AuthorsG.J van Rooij, O. Meyer, S. Brezinsek, C. Desgranges, D. Douai, S. Ertmer, A. Gallo, C. Gil, J. Gunn, T. Loarer, E. Tsitrone, EUROfusion PFC team, WEST team
JournalPhysica Scripta
Volume95
IssueT171
Pagination014060
Date Published03/2020
Abstract

A dedicated series of L-mode deuterium discharges were performed in WEST in which a broad parameter space in terms of divertor plasma temperature (inner divertor at <10 eV, outer divertor up to 50 eV) and impurity flux density was achieved by variation of X point elevation, upstream plasma density and fuelling position and rate. Density steps provided stable reference plasma conditions whilst density scans up to the point of detachment revealed the sputtering threshold behaviour of the dominant sputtering species. Tungsten gross erosion was quantified via the common WI 400.9 nm line and correlated with the residual gas content.

DOI10.1088/1402-4896/ab606c
Division

FP

Department

CPP

PID271b4aeff6fb583a896b494a40b8bb20
Alternate TitlePhys. Scr.
LabelOA
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