Spectrally resolved X-ray scatter from laser-shock-driven plasmas
| Autor: | Fida Khattak, M. M. Notley, E. Garcia Saiz, Gianluca Gregori, D. Chambers, D. Neely, A. Moore, S. Bandyopadhyay, David Riley, A. Comley |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | LASER AND PARTICLE BEAMS International Conference on Interaction of Atoms, Molecules and Plasmas with Intense Ultrashort Laser Pulses. 25(3) |
| ISSN: | 1469-803X 0263-0346 |
| Popis: | 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 ∼1 ns laser pulses. Separate 270 ps laser pulses were used to generate an intense source of Ti-He-α (1s2-1s2p1P) 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° 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. |
| Databáze: | OpenAIRE |
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