Estimation of ELM effects on Be and W erosion at JET-ILW
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F20%3A00531215" target="_blank" >RIV/61389021:_____/20:00531215 - isvavai.cz</a>
Result on the web
<a href="https://iopscience.iop.org/article/10.1088/1402-4896/ab45c0" target="_blank" >https://iopscience.iop.org/article/10.1088/1402-4896/ab45c0</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1402-4896/ab45c0" target="_blank" >10.1088/1402-4896/ab45c0</a>
Alternative languages
Result language
angličtina
Original language name
Estimation of ELM effects on Be and W erosion at JET-ILW
Original language description
An important W erosion mechanism in JET divertor is the physical sputtering by both, impurity (e.g. Be) and hydrogenic ions hitting the W divertor with energies determined by the pedestal temperature during edge-localized modes (ELMs) the so-called intra-ELM sputtering of W. The earlier developed analytical approach for the W divertor gross erosion estimation using the Langmuir probe measurements has been improved in this work taking into account the time-resolved pedestal temperature and density drop during the pedestal crash under intra-ELM conditions. The improved model allows reproducing the measured at the divertor tile particle and heat fluxes evolution at the effective magnetic connection length matched with the previous JET- ITER like wall (ILW) studies. The estimates for the tungsten sputtered flux in intra- and inter-ELM conditions for quasi-steady state plasmas executed at the end of the first year of JET-ILW operation (C30C experiment) show that Type I ELMs contribute significantly (∼85%) to the gross tungsten erosion which is in a good agreement with the divertor optical emission spectroscopy (W I 400.9 nm line). ELM filament radial propagation is considered based on the advective-diffusive model and JET-C experiment results. The estimation for the ELM-induced local Be main chamber erosion at JET-ILW reveals the increase of the Be sputtered flux by 30% under intra-ELM conditions.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physica Scripta
ISSN
0031-8949
e-ISSN
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Volume of the periodical
2020
Issue of the periodical within the volume
T171
Country of publishing house
GB - UNITED KINGDOM
Number of pages
5
Pages from-to
014027
UT code for WoS article
000520000600027
EID of the result in the Scopus database
2-s2.0-85084670047