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Hydrogen inventories in nuclear fusion devices
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2001 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 290, 381-388 p.Article in journal (Refereed) Published
Abstract [en]

Hydrogen retention in tokamaks is due to implantation into plasma-facing materials and trapping in deposited layers. In the limiter tokamak TEXTOR-94 hydrogen-rich deposited layers with thicknesses up to 1 mm are observed on recessed parts of the limiters, areas perpendicular to the magnetic field in the scrape-off layer (SOL), neutralizer plates of the pumped limiter and inside the pumping ducts. In the divertor tokamak JET the main deposition is observed in the divertor, additional deposits are observed in the main chamber on the sides of the guard limiters. Codeposition of carbon ions with hydrogen is the major mechanism of layer growth at areas with direct plasma contact. At remote areas without direct plasma contact, sticking of neutral hydrocarbon radicals seems to play an important role for hydrogen trapping.

Place, publisher, year, edition, pages
2001. Vol. 290, 381-388 p.
Keyword [en]
co-deposition, deuterium inventory, hydrogen retention, surface loss probabilities, carbon-film surfaces, 1st wall conditions, deuterium retention, elevated-temperatures, hydrocarbon radicals, doped graphites, jet, beryllium, textor
Identifiers
URN: urn:nbn:se:kth:diva-20472DOI: 10.1016/S0022-3115(00)00486-4ISI: 000167676700076OAI: oai:DiVA.org:kth-20472DiVA: diva2:339167
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Rubel, Marek J.

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Alfvén Laboratory
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