Spectroscopic measurements of Be erosion at JET ILW and interpretation with ERO modelling

D. Borodin, M. F. Stamp, A. Kirschner, C. Björkas, S. Brezinsek, J. Miettunen, D. Matveev, C. Silva, O. Van Hoey, M. Groth, S. Marsen, V. Philipps

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Beryllium (Be) erosion has been studied in dedicated limiter discharges in JET with the recently installed ITER-like wall [1]. Passive spectroscopy [2] in the vicinity of the solid Be limiter is used for measurement of the Be physical sputtering as the main erosion mechanism. To consider the 3D configuration of plasma parameters and the electromagnetic field, the actual limiter shape and the local transport affecting the fraction of Be coming into the observation volume, a detailed modelling with the ERO code has been applied to interpret the experimental data. The observed dependence of BeI and BeII line intensities on plasma parameters during the density scan and various line ratios are used to validate the model and the underlying data including the recently introduced assumptions for Be physical sputtering, the very same which were used before for ITER predictive modelling [3].

Original languageEnglish
Pages (from-to)S267-S271
JournalJournal of Nuclear Materials
Volume438
Issue numberSUPPL
DOIs
StatePublished - 2013
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by EURATOM and carried out within the framework of the European Fusion Development Agreement. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

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