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@ARTICLE{Heinola:837261,
author = {Heinola, K. and Likonen, J. and Ahlgren, T. and Brezinsek,
S. and De Temmerman, G. and Jepu, I. and Matthews, G. F. and
Pitts, R. A. and Widdowson, A.},
title = {{L}ong-term fuel retention and release in {JET}
{ITER}-{L}ike {W}all at {ITER}-relevant baking temperatures},
journal = {Nuclear fusion},
volume = {57},
number = {8},
issn = {1741-4326},
address = {Vienna},
publisher = {IAEA},
reportid = {FZJ-2017-06230},
pages = {086024 -},
year = {2017},
abstract = {The fuel outgassing efficiency from plasma-facing
components exposed in JET-ILW has been studied at
ITER-relevant baking temperatures. Samples retrieved from
the W divertor and Be main chamber were annealed at 350 and
240 °C, respectively. Annealing was performed with thermal
desoprtion spectrometry (TDS) for 0, 5 and 15 h to study
the deuterium removal effectiveness at the nominal baking
temperatures. The remained fraction was determined by
emptying the samples fully of deuterium by heating W and Be
samples up to 1000 and 775 °C,respectively. Results showed
the deposits in the divertor having an increasing effect to
the remaining retention at temperatures above baking.
Highest remaining fractions 54 and 87$ \\% $ were observed
with deposit thicknesses of 10 and 40 μm, respectively.
Substantially high fractions were obtained in the main
chamber samples from the deposit-free erosion zone of the
limiter midplane, in which the dominant fuel retention
mechanism is via implantation: 15 h annealing resulted in
retained deuterium higher than 90$ \\% $ . TDS results from
the divertor were simulated with TMAP7 calculations. The
spectra were modelled with three deuterium activation
energies resulting in good agreement with the experiments.},
cin = {IEK-4},
ddc = {530},
cid = {I:(DE-Juel1)IEK-4-20101013},
pnm = {174 - Plasma-Wall-Interaction (POF3-174)},
pid = {G:(DE-HGF)POF3-174},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000404721100002},
doi = {10.1088/1741-4326/aa747e},
url = {https://juser.fz-juelich.de/record/837261},
}