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Abstract

Local transport studies of JET ohmically heated plasmas show that ion losses in the region r/a < 2/3 exceed electron losses when the local electron density is greater than a critical value which increases with the plasma current I-p. Both ion and electron losses in the 1<q<2 region are due to thermal conduction, the ion conductivity being several times neoclassical, the departure from the neoclassical value increasing monotonically with I-p. The total energy confinement time tau-E of this region is up to 1.1 sec; tau-E scales as n-e**0.6, and no clear dependence on plasma current is found.

Additional information

Authors: BRUSATI M, JET JOINT UNDERTAKING, ABINGDON (UK);CORDEY L G JET JOINT UNDERTAKING, ABINGDON (UK), JET JOINT UNDERTAKING, ABINGDON (UK)
Bibliographic Reference: 12TH EUROPEAN CONFERENCE ON CONTROLLED FUSION AND PLASMA PHYSICS, BUDAPEST (HUNGARY), SEPT. 2-6, 1985 PP. 77-80 WRITE TO THE PUBLICATIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON, OX14 3EA (UK), MENTIONING REPORT JET-P(85)10, 1985
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