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Abstract

The temperature profiles produced by various heating profiles are calculated using local heat transport models. The models take the heat flux to be the sum of heat diffusion and a non-diffusive heat flow, consistent with local measurements of heat transport. Two models are developed analytically in detail: i) a heat pinch or excess temperature gradient model with constant coefficients; and ii) a nonlinear heat diffusion coefficient (chi) model. Both models predict weak (<or= 20%) temperature profile responses to physically relevant changes in the heat deposition profile -- primarily because the temperature profile is a double integral of the heating profile. The model predictions are shown to agree with JET data for a variety of heating profiles ranging from peaked on-axis, through approximately flat (NBI at high density), to localized off-axis (ICRH).

Additional information

Authors: CALLEN J D, JET JOINT UNDERTAKING, ABINGDON (UK);CHRISTIANSEN J P, JET JOINT UNDERTAKING, ABINGDON (UK);CORDEY J G, JET JOINT UNDERTAKING, ABINGDON (UK);THOMAS P R, JET JOINT UNDERTAKING, ABINGDON (UK);THOMSEN K JET JOINT UNDERTAKING, ABINGDON (UK), JET JOINT UNDERTAKING, ABINGDON (UK)
Bibliographic Reference: WRITE TO THE PUBLICATIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON OX14 3EA (UK), MENTIONING REPORT JET-P(87)10, 1987
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