Determination of Be sputtering yields from spectroscopic observations at the JET ITER-like wall based on three-dimensional ERO modelling

D. Borodin, S. Brezinsek, J. Miettunen, M. Stamp, A. Kirschner, C. Björkas, M. Groth, S. Marsen, C. Silva, S. W. Lisgo, D. Matveev, M. Airila, V. Philipps

Research output: Contribution to journalConference articlepeer-review

27 Scopus citations

Abstract

Estimations of the ITER first wall (FW) lifetime, previously made using the three-dimensional Monte-Carlo ERO code (Borodin et al 2011 Phys. Scr. T145 014008), depend strongly on the assumptions of the physical sputtering yield for beryllium (Be). It is of importance to validate the respective model and data at existing devices including the JET ITER-like wall (ILW) as most ITER-relevant experiments. Applying the same sputtering input data in ERO as those used before in the ITER-predictions, the ERO simulations for the Be light intensity (using up to date atomic data from ADAS and measured plasma conditions) reveal a factor of 2 overestimation in the assumed yield even if the low estimate assuming 50% D surface content is used. This result indicates the preference of this assumption for plasma-wetted areas. It points to a possible necessity to correct (reduce) the respective estimates for the Be sputtering yield and, accordingly, re-visit the ITER FW lifetime predictions.

Original languageEnglish
Article number014057
JournalPhysica Scripta
VolumeT159
DOIs
StatePublished - 2014
Externally publishedYes
Event14th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2013 - Julich, Germany
Duration: 13 May 201317 May 2013

Keywords

  • ERO code
  • ITER-like wall
  • JET
  • beryllium
  • erosion
  • modelling
  • spectroscopy

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