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  Mass transfer in long pellet guiding systems at ASDEX Upgrade and JET

Lorenz, A., Combs, S., Reich, M., Lang, P. T., Watson, M., Wilson, D., et al. (2003). Mass transfer in long pellet guiding systems at ASDEX Upgrade and JET. Fusion Engineering and Design, 69(1-4), 15-20. doi:10.1016/S0920-3796(03)00226-6.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-23C1-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-23C2-5
Genre: Journal Article

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 Creators:
Lorenz, A.1, Author              
Combs, S.2, Author
Reich, M.1, Author              
Lang, P. T.1, Author              
Watson, M.2, Author
Wilson, D.2, Author
Wittmann, C.1, Author              
Affiliations:
1Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856295              
2EFDA JET Culham, Culham Science Centre, Oxford OX14 3DB, UK; UKAEA Culham, Culham Science Centre, Oxford OX14 3DB, UK; Oak Ridge National Laboratory, Oak Ridge, TN 37831-8071, USA, ou_persistent22              

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Free keywords: 22nd Symposium on Fusion Technology (SOFT 2002), Helsinki, 2002-09-09 to 2002-09-13
 Abstract: Guiding systems used for transfer of cryogenic pellets to the tokamak inboard currently undergo optimisation to possibly extend the operational range of Inboard pellet injection scenarios. Work reported here has been concentrating on experimental studies and calculations of pellet mass loss during transfer in a guiding tube as a function of pellet parameters such as velocity and ice composition, and guiding track characteristics such as vacuum conductance, geometry, size and shape of cross-section. Results from ASDEX Upgrade and ORNL systems suggest, that centripetal loads on the pellets due to small radii bends in the systems strongly increase the erosion of pellet ice. A deleterious effect of accumulated gas due to sublimated D₂-ice blocking the tube and eroding subsequent pellets has been found. However, an efficient vacuum pumping set up for a given pellet repetition rate can significantly improve the mass conservation with respect to closed tube systems.

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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: Fusion Engineering and Design
  Alternative Title : Fusion Eng. Des.
Source Genre: Journal
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Publ. Info: Copyright © 2003 Elsevier B.V. All rights reserved
Pages: - Volume / Issue: 69 (1-4) Sequence Number: - Start / End Page: 15 - 20 Identifier: -