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Abstract

Radial thermal and particle diffusivities have been measured using transient methods, yielding both simultaneously in the plasma interior at values of r/a between 0.5 and 0.7. The electron thermal and particle diffusivities have been measured in OH plasmas, giving a value for the ratio of 6.8 +- 2.7. NBI heated H-mode plasmas are indistinguishable from OH plasmas in this respect. The ion thermal diffusivity has also been measured in H-mode plasmas; the ratio of this to the electron thermal diffusivity is between 0.3 and 1.0. These results would suggest that micro-magnetic stochasticity, rather than E X B convection, may be the key mechanism in anomalous transport.

Additional information

Authors: GONDHALEKAR A, JET Joint Undertaking, Abingdon, Oxon. (GB);CHEETHAM A D, JET Joint Undertaking, Abingdon, Oxon. (GB);JARVIS O N, JET Joint Undertaking, Abingdon, Oxon. (GB);MORGAN P D, JET Joint Undertaking, Abingdon, Oxon. (GB);O'ROURKE J, JET Joint Undertaking, Abingdon, Oxon. (GB);SADLER G, JET Joint Undertaking, Abingdon, Oxon. (GB);WATKINS M L, JET Joint Undertaking, Abingdon, Oxon. (GB);DE HAAS J C M, FOM Institut voor Plasmafysica "Rijnhuizen" (NL)
Bibliographic Reference: Report: JET-P(88)60 (1988)
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 198910750 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: en
Available languages: en