Modelling Thomson scattering for systems with non-equilibrium electron distributions
1 Plasma Physics Department, AWE plc, Aldermaston RG7 4PR, UK
2 CFSA, Department of Physics, University of Warwick, Coventry CV4 7AL, UK
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Published online: 15 November 2013
We investigate the effect of non-equilibrium electron distributions in the analysis of Thomson scattering for a range of conditions of interest to inertial confinement fusion experiments. Firstly, a generalised one-component model based on quantum statistical theory is given in the random phase approximation (RPA). The Chihara expression for electron-ion plasmas is then adapted to include the new non-equilibrium electron physics. The theoretical scattering spectra for both diffuse and dense plasmas in which non-equilibrium electron distributions are expected to arise are considered. We find that such distributions strongly influence the spectra and are hence an important consideration for accurately determining the plasma conditions.
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