Bragg diffraction using a 100 ps 17.5 keV x-ray backlighter and the Bragg diffraction imager

B R Maddox; H-S Park; J Hawreliak; A Elsholz; R Van Maren; B A Remington; A Comley; J S Wark

doi:10.1063/1.3491295

Bragg diffraction using a 100 ps 17.5 keV x-ray backlighter and the Bragg diffraction imager

Rev Sci Instrum. 2010 Oct;81(10):10E522. doi: 10.1063/1.3491295.

Authors

B R Maddox¹, H-S Park, J Hawreliak, A Elsholz, R Van Maren, B A Remington, A Comley, J S Wark

Affiliation

¹ Lawrence Livermore National Laboratory, Livermore, California 94550, USA.

PMID: 21034050
DOI: 10.1063/1.3491295

Abstract

A new diagnostic for measuring Bragg diffraction of petawatt-generated high-energy x rays off a laser-compressed crystal was designed and tested successfully at the Omega EP laser facility on static Mo and Ta (111) oriented single crystal samples using a 17.5 keV Mo Kα backlighter. The Bragg diffraction imager consists of a heavily shielded enclosure and a precisely positioned beam block attached to the enclosure by an aluminum arm. Fuji image plates are used as the x-ray detectors. The diffraction from Mo and Ta (222) crystal planes was clearly detected with a high signal-to-noise. This technique will be applied to shock- and quasi-isentropically loaded single crystals on the Omega EP laser.