Hard x-ray radiography for density measurement in shock compressed matter

Ravasio, A.; Koenig, M.; Le Pape, S.; Benuzzi-Mounaix, A.; Park, H. S.; Cecchetti, C.; Patel, P.; Schiavi, A.; Ozaki, N.; Mackinnon, A.; Loupias, B.; Batani, D.; Boehly, T.; Borghesi, M.; Dezulian, R.; Henry, E.; Notley, M.; Bandyopadhyay, S.; Clarke, R.; Vinci, T.
June 2008
Physics of Plasmas;Jun2008, Vol. 15 Issue 6, p060701
Academic Journal
In this letter we report on the direct density measurement in a shock compressed aluminum target using hard x-ray radiography. Experimental data employing a molybdenum Kα source at 17.5 keV, generated with a short pulse laser are presented. High spatial resolution was obtained thanks to a new design for the backlighter geometry. Density values deduced from radiography are compared to predictions from hydrodynamic simulations, which have been calibrated in order to reproduce shock velocities measured from a rear-side self-emission diagnostic. Our results reveal the great potential of this technique as a diagnostic tool for direct density measurements in dense high-Z opaque materials.


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