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 K alpha 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. (c) 2008 American Institute of Physics.
Hard x-ray radiography for density measurement in shock compressed matter / A., Ravasio; M., Koenig; S., Le Pape; A., Benuzzi Mounaix; H. S., Park; C., Cecchetti; P., Patel; Schiavi, Angelo; N., Ozaki; A., Mackinnon; B., Loupias; D., Batani; T., Boehly; M., Borghesi; R., Dezulian; E., Henry; M., Notley; S., Bandyopadhyay; R., Clarke; T., Vinci. - In: PHYSICS OF PLASMAS. - ISSN 1070-664X. - STAMPA. - 15:6(2008), p. 060701. [10.1063/1.2928156]
Hard x-ray radiography for density measurement in shock compressed matter
SCHIAVI, ANGELO;
2008
Abstract
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 K alpha 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. (c) 2008 American Institute of Physics.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
