Global Erosion and Deposition Patterns in JET with the ITER-like Wall

Global Erosion and Deposition Patterns in JET with the ITER-like Wall

Global Erosion and Deposition Patterns in JET with the ITER-like Wall 150 150 Mathew

A set of Be and W tiles removed after the first ITER-like Wall campaigns (JET-ILW) from 2011-2012 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.

Collection:
Journals
Journal:
Journal of Nuclear Materials
Publisher:
Elsevier
Published date:
08/01/2015