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This article discusses plasma edge physics and deals with plasma zones and edge structure in relation to the last closed magnetic flux surface (LCFS) and the scrape-off layer (SOL). Plasma-wall contact is examined and the formation of an electrostatic sheath to regulate current flow is discussed. The neutralisation of incoming ions with re-emission of hydrogen is considered and transport at the plasma edge involving the release of wall impurities by physical and chemical mechanisms is described.

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Authors: CLAASSEN H A, Forschungszentrum Jülich GmbH (KFA) (DE);GERHAUSER H, Forschungszentrum Jülich GmbH (KFA) (DE)
Bibliographic Reference: Article: Transactions of Fusion Technology, Vol. 25 (1994) No. 2, pp. 225-230
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