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  Erosion and migration of tungsten employed at the main chamber first wall of ASDEX Upgrade

Krieger, K., Geier, A., Gong, B., Maier, H., Neu, R., Rohde, V., et al. (2003). Erosion and migration of tungsten employed at the main chamber first wall of ASDEX Upgrade. Journal of Nuclear Materials, 313-316, 327-332. doi:10.1016/S0022-3115(02)01351-X.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-2F56-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-0324-4
Genre: Journal Article

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 Creators:
Krieger, K.1, Author              
Geier, A.2, Author              
Gong, B.3, Author
Maier, H.1, Author              
Neu, R.4, Author              
Rohde, V.2, Author              
ASDEX Upgrade Team5, Author
Affiliations:
1Material Research (MF), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856328              
2Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856295              
3Institute of Plasma Physics, Academia Sinica, Hefei, Anhui 230031, China, ou_persistent22              
4Experimental Plasma Physics 4 (E4), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856293              
5Max Planck Institute for Plasma Physics, Max Planck Society, Boltzmannstraße 2, D-85748 Garching, DE, ou_1856284              

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Free keywords: 15th International Conference on Plasma Surface Interactions in Controlled Fusion Devices (PSI 15), Gifu, 2002-05-26 to 2002-05-31
 Abstract: In ASDEX Upgrade, tungsten is employed as plasma facing material at the central column of the plasma main chamber. The campaign averaged tungsten erosion flux was determined by measuring the difference of the W-layer thickness before and after experimental campaigns using ion beam analysis methods. The lateral variations of the observed tungsten erosion flux reflects the pattern of magnetic field lines intersecting the respective plasma facing surfaces. Long term migration and redeposition of eroded tungsten were investigated by ion beam analysis of deposited tungsten on wall samples from main chamber and divertor. The obtained results, as well as the spectroscopically observed low tungsten plasma penetration probability, indicate that a major fraction of the eroded tungsten migrates predominantly through direct transport channels in the outer plasma scrape-off layer without entering the confined plasma.

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Language(s): eng - English
 Dates: 2003
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Degree: -

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Title: Journal of Nuclear Materials
  Alternative Title : J. Nucl. Mater.
Source Genre: Journal
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Publ. Info: Copyright © 2003 Elsevier Science B.V. All rights reserved
Pages: - Volume / Issue: 313-316 Sequence Number: - Start / End Page: 327 - 332 Identifier: -