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A physically motivated, theoretical basis for defining scrape-off layer (SOL) widths, is proposed. Applying it to theoretical models proposed for transport in the SOL shows how the width is affected by the form of the cross-field transport and the parallel transport to target plates. For a cross-field diffusivity and a parallel loss time, an estimate evaluated at the SOL-core interface, is found to provide a physically meaningful and accurate expression for the power scrape-off layer width.

Additional information

Authors: CONNOR J W, AEA Fusion, Culham Laboratory, Abingdon, Oxon (GB);HELANDER P, AEA Fusion, Culham Laboratory, Abingdon, Oxon (GB)
Bibliographic Reference: Report: UKAEA FUS 404 EN (1998) 5pp.
Availability: Available from the Librarian, UKAEA, Culham Laboratory, Abingdon, Oxon, OX14 3DB (GB)
Record Number: 199811290 / Last updated on: 1998-10-27
Original language: en
Available languages: en
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