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A test of nitrogen-assisted plasma discharges for fuel removal from plasma-facing components in tokamaks
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- Sundelin, Per (author)
- KTH,Fusionsplasmafysik
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- Rubel, Marek J. (author)
- KTH,Fusionsplasmafysik
- Emmoth, B. (author)
- show more...
- Philipps, V. (author)
- Sergienko, G. (author)
- show less...
- (creator_code:org_t)
- 2008-03-27
- 2008
- English.
- In: PROCEEDINGS OF THE 17TH INTERNATIONAL VACUUM CONGRESS/13TH INTERNATIONAL CONFERENCE ON SURFACE SCIENCE/INTERNATIONAL CONFERENCE ON NANOSCIENCE AND TECHNOLOGY. - Bristol : IOP PUBLISHING LTD. ; , s. 062027-
- Conference paper (peer-reviewed)
Abstract
Subject headings
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- Safety regulations limit the amount of tritium accumulated in wall components of a fusion reactor to 350g. Because of this, reduction of long-term fuel inventory is one of the most urgent tasks to be resolved to ensure the safe and economic operation of a reactor-class fusion device. Several methods have been suggested and tested. The aim of this paper is to evaluate the cleaning efficiency of plasma-facing components by ICRH-assisted plasma discharges with in nitrogen-hydrogen in the TEXTOR tokamak. Three types of probes were investigated: laboratory prepared a-C: D layers on silicon; boron layers on silicon obtained by pre-boronisation in TEXTOR and not coated Inconel substrates. The main results are following: (i) laboratory prepared a-C: D layers are not affected: deuterium and carbon contents did not decrease (ii) the morphology of layers pre-boronised in TEXTOR is not affected (iii) no significant effects were noticed on Inconel probes. A comparison of cleaning methods with nitrogen and oxygen is also presented.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Keyword
- CO-DEPOSITED LAYERS
- LABORATORY PLASMAS
- JET
- LASER
- DIVERTOR
- EROSION
- TILES
- Plasma physics
- Plasmafysik
Publication and Content Type
- ref (subject category)
- kon (subject category)
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- By the author/editor
- Sundelin, Per
- Rubel, Marek J.
- Emmoth, B.
- Philipps, V.
- Sergienko, G.
- About the subject
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- NATURAL SCIENCES
- NATURAL SCIENCES
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- By the university
- Royal Institute of Technology
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