Publications by Justin Wark

Simultaneous 8.2 keV phase-contrast imaging and 24.6 keV X-ray diffraction from shock-compressed matter at the LCLS

Applied Physics Letters AIP Publishing 112 (2018) 221907

F Seiboth, LB Fletcher, D McGonegle, S Anzellini, LE Dresselhaus-Cooper, M Frost, E Galtier, S Goede, M Harmand, HJ Lee, A Levitan, K Miyanishi, B Nagler, I Nam, N Ozaki, M Rodel, A Schropp, C Spindloe, P Sun, J Wark, J Hastings, SH Glenzer, EE McBride

In this work, we demonstrate simultaneous phase-contrast imaging (PCI) and X-ray diffraction from shock compressed matter at the Matter in Extreme Conditions (MEC) endstation, Linac Coherent Light Source (LCLS). We utilize the chromaticity from compound refractive X-ray lenses to focus the 24.6 keV 3rd order undulator harmonic of the LCLS to a spot size of 5 μm on target to perform X-ray diffraction. Simultaneous PCI from the 8.2 keV fundamental X-ray beam is used to visualize and measure the transient properties of the shock wave over a 500 μm field of view. Furthermore, we demonstrate the ability to extend the reciprocal space by 5˚A−1, relative to the fundamental X-ray energy, by utilizing X-ray diffraction from the 3rd harmonic of the LCLS.

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