Determination of the stochastic layer properties induced by magnetic perturbations via heat pulse experiments at ASDEX upgrade
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F17%3A00481519" target="_blank" >RIV/61389021:_____/17:00481519 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.nme.2017.03.018" target="_blank" >http://dx.doi.org/10.1016/j.nme.2017.03.018</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.nme.2017.03.018" target="_blank" >10.1016/j.nme.2017.03.018</a>
Alternative languages
Result language
angličtina
Original language name
Determination of the stochastic layer properties induced by magnetic perturbations via heat pulse experiments at ASDEX upgrade
Original language description
A heat pulse experiment was carried out in the tokamak ASDEX Upgrade to estimate the stochastic layer width of a deuterium L-mode discharge with externally applied Magnetic Perturbations. The method relies on the deposition of ECRH pulses in the plasma edge while measuring the divertor target heat flux with high temporal resolution IR thermography and Langmuir probes. The experimental results were compared to simulations of the time dependent heat pulse propagation on a constant plasma background with the EMC3-EIRENE code package, using an ad-hoc screening model. If no screening was taken into account in the simulations a decrease in the characteristic heat pulse propagation time was observed, which shows that the heat transport is enhanced compared to the screened cases. No such enhancement was found in the experiment, indicating strong screening. In further simulations the effect of screening on the target fluxes was investigated for varying densities. For low densities it was found that screening reduces the strike line splitting strongly, while for higher densities no strong strike line splitting was found, independent of the screening degree. For strongly detached L-mode conditions with MPs experi- ments at AUG indicate that the lobe structures vanish completely.
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
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nuclear Materials and Energy
ISSN
2352-1791
e-ISSN
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Volume of the periodical
12
Issue of the periodical within the volume
August
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
831-837
UT code for WoS article
000417293300135
EID of the result in the Scopus database
2-s2.0-85013434703