Global erosion and deposition patterns in JET with the ITER-like wall

Research output: Contribution to journalArticle

Authors

  • Aleksandra Baron-Wiechec
  • Anna Widdowson
  • Eduardo Alves
  • Charkie Ayres
  • Nuno Barradas
  • Sebastijan Brezinsek
  • Paul Coad
  • Norberto Catarino
  • Kalle Heinola
  • Jari Likonen
  • Guy Matthews
  • Matej Mayer
  • Per Petersson
  • Marek Rubel
  • Wouter Van Renterghem
  • Inge Uytdenhouwen

Documents & links

Abstract

A set of Be and Wtiles removed after the first ITER-like wall campaigns (JET-ILW) from 2011 to 2012 has been analysed. The results indicate that the primary erosion site is in the main chamber (Be) as in previous carbon campaigns (JET-C). In particular the limiters tiles near the mid-plane are eroded probably during the limiter phases of discharges. W is found at low concentrations on all plasma-facing surfaces of the vessel indicating deposition via plasma transport initially from the W divertor and from main chamber W-coated tiles; there are also traces of Mo (used as an interlayer for these coatings). Deposited films in the inner divertor have a layered structure, and every layer is dominated by Be with some W and O content.

Details

Original languageEnglish
Pages (from-to)157-161
JournalJournal of Nuclear Materials
Volume463
DOIs
Publication statusPublished - Aug 2015
Event21st International Conference on Plasma-Surface Interactions in Controlled Fusion Devices - Kanazawa, Japan
Duration: 26 May 201430 May 2014

Keywords

  • JET, scanning electron microscopy

ID: 84755