Long-term fuel retention in JET ITER-like wall. (2nd February 2016)

• Record Type: Journal Article
• Authors: Heinola, K; Widdowson, A; Likonen, J; Alves, E; Baron-Wiechec, A; Barradas, N; Brezinsek, S; Catarino, N; Coad, P; Koivuranta, S; Krat, S; Matthews, G F; Mayer, M; Petersson, P; Contributors, JET
• Is Part Of: Physica scripta. Volume T167(2016:Feb.)
• Publication Date: 2016-02-02
• Subjects: fusion energy -- fuel retention -- ion beam analysis -- TDS -- deposition; 28.52.Fa -- 52.55.Fa -- 52.55.Pi -- 52.70.Nc -- 52.77.Dq; Physics -- Periodicals; 530.05
• DOI: 10.1088/0031-8949/T167/1/014075
• Languages: English
• ISSNs: 0031-8949

Abstract

Abstract: Post-mortem studies with ion beam analysis, thermal desorption, and secondary ion mass spectrometry have been applied for investigating the long-term fuel retention in the JET ITER-like wall components. The retention takes place via implantation and co-deposition, and the highest retention values were found to correlate with the thickness of the deposited impurity layers. From the total amount of retained D fuel over half was detected in the divertor region. The majority of the retained D is on the top surface of the inner divertor, whereas the least retention was measured in the main chamber on the mid-plane of the inner wall limiter. The recessed areas of the inner wall showed significant contribution to the main chamber total retention. Thermal desorption spectroscopy analysis revealed the energetic T from DD reactions being implanted in the divertor. The total T inventory was assessed to be .