Demonstration of x-ray fluorescence imaging to diagnose high-energy-density plasmas

X-ray diagnostic techniques are widely used to diagnose high-energy-density experiments. Radiography is used to create 2D images of plasma density using the relative transmission of the source x-rays, but the path-integrated nature of this process limits its usefulness when diagnosing large-volume or geometrically-complex targets. A technique capable of measuring local conditions is required to characterize plasmas in these geometries. Here we describe an x-ray fluorescence imaging (XRFI) diagnostic that uses a collimated probe beam to sample a small portion of the system [1]. The x-ray fluorescence induced in the probed region was used to calculate material density, shock velocity, and temperature simultaneously using an imaging x-ray spectrometer. Data from recent experiments performed at the Trident laser facility at Los Alamos National Lab will be presented. *This work is funded by the NNSA-DS and SC-OFES Joint Program in HED Laboratory Plasmas, grant number DE-NA0001840 and supported by the NSF GRFP Grant No. 2013155705. \\[4pt] [1] L.J. Suter et al. Rev. Sci. Inst. 70, 663 (1999), N.E. Lanier et al. Rev. Sci. Inst. 74, 2169 (2003).