Journal
LASER AND PARTICLE BEAMS
Volume 25, Issue 3, Pages 465-469Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0263034607000572
Keywords
plasma; shock; X-ray scatter
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Funding
- Engineering and Physical Sciences Research Council [EP/C001869/1] Funding Source: researchfish
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We report spectrally resolved X-ray scattering data from shock compressed foils illustrating the feasibility of X-ray Thomson scattering experiment on a sub-kilo joule laser system. Sandwich targets consisting of CH/Al/CH were shock compressed using similar to 1 ns laser pulses. Separate 270 ps laser pulses were used to generate an intense source of Ti-He-alpha (1s(2)-1s2p(1)P) radiation which was used as a probing source of 4.75 keV photons. The spectrum of scattered photons was recorded at a scattering angle of 82 degrees with a CCD fitted spectrometer using a PET crystal in von-Hamos geometry. Although spectral resolution was used to separate the scatter from any background, the resolution was limited by source broadening. The relative level of scatter at different times in the sample history was measured by varying the delay between the shock driving beams and the back-lighter beams. We have compared the scatter spectra with simulations based on two different models of the L-shell bound-free contribution.
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