Measurements of Radiative Shock Properties using Xray Thomson Scattering

Details Measurements of Radiative Shock Properties using Xray Thomson Scattering Measurements of Radiative Shock Properties using Xray Thomson Scattering

Nov 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aps..dppuo4014v&link_type=abstract

American Physical Society, 50th Annual Meeting of the Division of Plasma Physics, November 17-21, 2008, abstract #UO4.014

Physics

Plasma Physics

Scientific paper

Radiative shocks are shock waves whose structure has been altered by radiation transport from the shock-heated matter. Such shocks are present in numerous astrophysical systems, including supernova remnants, supernovae, and accretion disks. Recent experiments have used the Omega laser to study radiative shock systems that are optically thin upstream and optically thick downstream. A thin slab of low-Z material is driven into a 1.1 atm. cylinder of high-Z gas at speeds > 100 km/s, producing strong radiative effects. Energy lost to radiation escaping upstream causes the shock to collapse spatially, producing a thin dense shell. X-ray Thomson scattering is employed, in the Compton scattering regime, to measure the electron temperature and ionization in the shocked matter. The experiment used emission from a Mn x-ray source at 6.15 and 6.18 keV, oriented to produce scattering at angles near 100 degrees. The x-ray spectrum was detected using a crystal spectrometer and a gated, multi-strip, microchannel-plate detector. Measured results will be shown, and the inferred properties will be compared with results of simulations and analytic estimates.

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