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Analysis of Thomson scattering data from strongly-driven hydrogen

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Chapman, D. A., Vorberger, Jan, Wünsch, Kathrin and Gericke, Dirk O. (2012) Analysis of Thomson scattering data from strongly-driven hydrogen. High Energy Density Physics, Vol.8 (No.2). pp. 175-179. doi:10.1016/j.hedp.2011.11.013 ISSN 1574-1818.

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Official URL: http://dx.doi.org/10.1016/j.hedp.2011.11.013

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Abstract

We present the theory necessary for analysing Thomson scattering data from plasmas in states far from equilibrium. As an example, we compare with experimental data obtained during the interaction of cryogenic hydrogen with the intense VUV radiation of the FLASH free electron laser at DESY in Hamburg. The component due to inelastic scattering from free electrons is treated within a generalised quantum statistical approach which accounts for the nonequilibrium states produced by the strong pump of the FEL radiation. The elastic scattering component is determined by the structure factor of the ions for the initial conditions of a cold, atomic fluid as the ions do not rearrange during the interaction time. Monte Carlo simulations show that this treatment results in a very small elastic scattering feature. Integrating the full nonequilibrium spectrum over time yields excellent agreement with the measured data. Moreover, this treatment gives quantitatively different plasma conditions as may be inferred using an equilibrium analysis. © 2012 .

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title: High Energy Density Physics
Publisher: Elsevier Advanced Technology
ISSN: 1574-1818
Official Date: June 2012
Dates:
DateEvent
June 2012Published
Volume: Vol.8
Number: No.2
Page Range: pp. 175-179
DOI: 10.1016/j.hedp.2011.11.013
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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