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High performance plasmas established by the development of the H-mode regime in JET are discussed. The phenomenology of confinement and termination in the PEP H-mode is reviewed and the high beta(POL) H-mode and hot ion (HI) H-modes are analysed. These three regimes are transient and the mechanisms terminating the period of enhanced confinement are discussed. Common features between the high beta(POL) and HI regimes are identified which suggest that they are effectively two aspects of a unified very high (VH) confinement regime.

Additional information

Authors: JET TEAM, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(94)09 EN (1994) 23 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
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