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Access conditions for H-modes with detached divertor plasmas are derived by considering power threshold, divertor plasma temperature and density limit constraints. It is found that there is a minium scrape-off layer power and main plasma density for accessing the detached divertor H-mode, and that the required divertor radiated power fraction must increase as the machine size and field increase. The model describes, at least qualitatively experimental findings on ASDEX-Upgrade, DIII-D, JET, and JT-60.

Additional information

Authors: VLASES G, JET Joint Undertaking Abingdon, Oxon (GB);BORRASS K, Max-Planck-Institut für Plasma Physik, Garching (DE);FARENGO R, Comisión Nacional de Energía Atómica, Buenos Aires (AR)
Bibliographic Reference: Report: JET-P(95)74 (1995) 11pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon, OX14 3EA (GB)
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