Kirkpatrick-Baez Microscope for Hot-electron Transport Imaging in Fast Ignition Experiments

H. TIEDJE, A. ALI, N. VAFAEI-NAJAFABADI, Univ Alberta, T. MA, L. JARROT, D. MARISCAL, C.W. MURPHY, B. WESTOVER, B.S. PARADKAR, T. YABUUCHI, UCSD - K-alpha emission from tracer layers is a powerful diagnostic for quantitatively measuring the generation and transport of MeV electrons in studies of Fast Ignition Fusion. We are developing a Kirkpatrick-Baez microscope for such experiments at the Titan Laser Facility using grazing incidence platinum coated mirrors together with metal filters to detect copper K-alpha emission from tracer layers in planar and cone-wire targets. The instrument performance has been modeled using ray tracing and characterized by a cw x-ray source. Broadband multilayer grazing incidence mirrors are also being designed for both copper K-alpha and silver K-alpha imaging. The characteristics of the KB microscope and initial experimental results on electron transport will be presented.