Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Investigation of deuterium trapping and release in the JET divertor during the third ILW campaign using TDS
 
research article

Investigation of deuterium trapping and release in the JET divertor during the third ILW campaign using TDS

Likonen, J.
•
Heinola, K.
•
De Backer, A.
Show more
May 1, 2019
Nuclear Materials and Energy

Selected set of samples from JET ITER-Like Wall (JET-ILW) divertor tiles exposed in 2015-2016 has been analysed using Thermal Desorption Spectrometry (TDS). The deuterium (D) amounts obtained with TDS were compared with Nuclear Reaction Analysis (NRA). The highest amount of D was found on the top part of inner divertor which has regions with the thickest deposited layers as for divertor tiles removed in 2014. This area resides deep in the scrape-off layer and plasma configurations for the second (ILW-2, 2013-2014) and the third (ILW-3, 2015-2016) JET-ILW campaigns were similar. Agreement between TDS and NRA is good on the apron of Tile 1 and on the upper vertical region whereas on the lower vertical region of Tile 1 the NRA results are clearly smaller than the TDS results. Inner divertor Tile 3 has somewhat less D than Tiles 0 and 1, and the D amount decreases towards the lower part of the tile. The D retention at the divertor inner and outer corner regions is not symmetric as there is more D retention poloidally at the inner than at the outer divertor corner. In most cases the TDS spectra for the ILW-3 samples are different from the corresponding ILW-2 spectra because HD and D-2 release occurs at higher temperatures than from the ILW-2 samples indicating that the low energy traps have been emptied during the plasma operations and that D is either in the energetically deep traps or located deeper in the sample.

  • Files
  • Details
  • Metrics
Type
research article
DOI
10.1016/j.nme.2019.03.012
Web of Science ID

WOS:000470746100048

Author(s)
Likonen, J.
Heinola, K.
De Backer, A.
Baron-Wiechec, A.
Catarino, N.
Jepu, I
Ayres, C. F.
Coad, P.
Matthews, G. F.
Widdowson, A.
Show more
Date Issued

2019-05-01

Publisher

Elsevier

Published in
Nuclear Materials and Energy
Volume

19

Start page

300

End page

306

Subjects

Nuclear Science & Technology

•

Nuclear Science & Technology

•

retention

•

tiles

Note

This is an open access article under the terms of the Creative Commons Attribution License

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SPC  
Available on Infoscience
October 22, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/162209
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés