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

Author
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.

Year of Publication
2020
Journal
Physica Scripta
Volume
95
Issue
T171
Number of Pages
014060
Date Published
03/2020
Publisher
University of Amsterdam
DOI
10.1088/1402-4896/ab606c
PId
271b4aeff6fb583a896b494a40b8bb20
Alternate Journal
Phys. Scr.
Label
OA
Attachment
Journal Article
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