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Recent results on the understanding and scaling of several of the operational boundaries found in ELMy H-mode plasmas are presented. Divertor geometry is found to be important in determining the H-mode transition power and temperature. Recent experiments from different tokamaks find apparently conflicting evidence for the role of the edge neutral density in controlling the H-mode transition and further intermachine comparisons are clearly warranted.

Additional information

Authors: HORTON L D, JET Joint Undertaking, Abingdon (GB)
Bibliographic Reference: Report: JET-P(99)52, 11pp.
Availability: Available from the Librarian, JET Joint Undertaking, Abingdon (GB)
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