Ohmic ion temperature and thermal diffusivity profiles from the JET neutron emission profile monitor
- 1 October 1993
- journal article
- Published by IOP Publishing in Plasma Physics and Controlled Fusion
- Vol. 35 (10) , 1433-1440
- https://doi.org/10.1088/0741-3335/35/10/006
Abstract
The JET neutron emission profile monitor was used to study ohmically heated deuterium discharges. The radial profile of the neutron emissivity is deduced from the line-integral data. The profiles of ion temperature, Ti, and ion thermal diffusivity, chi i, are derived under steady-state conditions. The inferred chi i, for 0.3 < p = r/a < 0.5, is in the range 0.5-2.5m2s-1. The ion thermal diffusivity is higher than, and its scaling with plasma current opposite to, that predicted by neoclassical theory.Keywords
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