Target particle and heat loads in low-triangularity L-mode plasmas in JET with carbon and beryllium/tungsten walls
Author | |
Abstract |
Divertor radiation profiles, and power and particle fluxes to the target have been measured in attached \{JET\} L-mode plasmas with carbon and beryllium/tungsten wall materials. In the beryllium/tungsten configuration, factors of 2–3 higher power loads and peak temperatures at the low field side target were observed in high-recycling scrape-off layer conditions, whilst in close-to-sheath-limited conditions almost identical plasmas were obtained. The 30% reduction in total radiation with the beryllium/tungsten wall is consistent with a reduction of carbon as the dominant impurity radiator; however similar ion current to the plates, emission from recycling neutrals and neutral pressures in the pumping plenum were measured. Simulations with the EDGDE2/EIRENE code of these plasmas indicate a reduction of the total divertor radiation when carbon is omitted, but significantly higher power loads in high-recycling and detached conditions are predicted than measured. |
Year of Publication |
2013
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Journal |
Journal of Nuclear Materials
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Volume |
438, Supplement
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Number of Pages |
S175 - S179
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URL |
http://www.sciencedirect.com/science/article/pii/S0022311513000809
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DOI |
http://dx.doi.org/10.1016/j.jnucmat.2013.01.072
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PId |
dfe01b7561a57519edbe811b64f84b34
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Alternate Journal |
J. Nucl. Mater.
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Journal Article
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