Determination of the deuterium temperature profile in magnetic fusion plasmas |
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Authors: | G Gorini N Gottardi |
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Institution: | (1) Istituto di Fisica del Plasma, Associazione EURATOM-ENEA-CNR, via Bassini 15, 20133 Milano, Italia;(2) JET Joint Undertaking-Abingdon, OX143EA, Oxfordshire, England |
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Abstract: | Summary A new experimental method for determining the radial deuterium temperature profileT
D(R) in axisymmetrical toroidal fusion plasmas is presented. The method is based on a generalized Abel inversion of neutron brightness
data providing the radial neutron emissivity profile of the plasma. This profile, combined with information on the deuterium
density profile, is used to determineT
D(R) under the assumption that the ion velocity distribution is Maxwellian. Results are presented here from the analysis of JET
data. It is found that, for typical JET plasma conditions, the dominant source of uncertainty arises from the high plasma
impurity level and the fact that it is poorly known; these problems can be expected to be remedied and neutron brightness
measurements would be expected to be very effective (especially in high-density plasmas) as aT
D(R) diagnostics. |
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Keywords: | Particle measurements PACS 52 25 Tx Emission absorption and scattering of particles |
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