ELM induced tungsten melting and its impact on tokamak operation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F15%3A00444973" target="_blank" >RIV/61389021:_____/15:00444973 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.jnucmat.2014.08.062" target="_blank" >http://dx.doi.org/10.1016/j.jnucmat.2014.08.062</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jnucmat.2014.08.062" target="_blank" >10.1016/j.jnucmat.2014.08.062</a>

Result language
angličtina
Original language name
ELM induced tungsten melting and its impact on tokamak operation
Original language description
In JET-ILW dedicated melt exposures were performed using a sequence of 3MA/2.9T H-Mode JET pulses with an input power of PIN = 23 MW, a stored energy of 6 MJ and regular type I ELMs at DWELM = 0.3 MJ and f ELM 30 Hz. In order to assess the risk of starting ITER operations with a full W divertor, one of the task was to measure the consequences of Wtransients melting due to ELMs. JET is the only tokamak able to produce transients/ ELMs large enough (>300 kJ per ELM) to facilitate melting of tungsten. SuchELMs are comparable to mitigated ELMs expected in ITER. By moving the outer strike point (OSP) onto a dedicated leading edge the base temperature was raised within 1 s to allow transient ELM-driven melting during the subsequent 0.5 s. Almost 1 mm (6mm3)of W was moved by 150 ELMs within 5 subsequent discharges. Significant material losses in terms of ejections into the plasma were not observed. There is indirect evidence that some small droplets (80 lm) were ejected.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BG - Nuclear, atomic and molecular physics, accelerators
OECD FORD branch
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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