A new Wolter x-ray imager has been developed for the Z machine to study the emission of warm (>15 keV) x-ray sources. A Wolter optic has been adapted from observational astronomy and medical imaging, which uses curved x-ray mirrors to form a 2D image of a source with 5 × 5 × 5 mm3 field-of-view and measured 60-300-μm resolution on-axis. The mirrors consist of a multilayer that create a narrow bandpass around the Mo Kα lines at 17.5 keV. We provide an overview of the instrument design and measured imaging performance. In addition, we present the first data from the instrument of a Mo wire array z-pinch on the Z machine, demonstrating improvements in spatial resolution and a 350-4100× increase in the signal over previous pinhole imaging techniques.
Walton, Chris C.; Pardini, Tom; Brejnholt, Nicolai F.; Ayers, Jay J.; Mccarville, 1.; Pickworth, Louisa A.; Bradley, David K.; Decker, Todd A.; Hau-Riege, Stefan P.; Hill, Randal M.; Michael J PivovaroffMichael J.; Regina SouflRegina; Author, No; Vogel, Julia K.; Bell, Perry M.; Ampleford, David A.; Fein, Jeffrey R.; Ball, Christopher R.; Bourdon, Christopher B.; Romaine, Suzanne; Ames, Andrew O.; Bruni, Ricardo J.; Kilaru, Kiranmayee; Roberts, Oliver J.; Ramsey, Brian D.
Proceedings of SPIE - The International Society for Optical Engineering
Ampleford, David A.; Ames, Andrew; Bourdon, Christopher B.; Bruni, Ricardo; Kilaru, Kiranmayee; Kozioziemski, Bernard; Pivovaroff, Michael J.; Ramsey, Brian D.; Romaine, Suzanne E.; Vogel, Julia; Walton, Christopher; Wu, Ming W.
Here, we have developed a process for indirectly coating small diameter electroformed nickel replicated optics with multilayers to increase their response at high energy (i.e. >10 keV). The ability to fabricate small diameter multilayer-coated full-shell Wolter X-ray optics with narrow bandpass opens the door to several applications within astronomy and also provides a path for cross-fertilization to other fields. We report on the characterization and evaluation of the first two prototype X-ray Wolter optics to be delivered to the Z Pulsed Power Facility at Sandia National Laboratories. The intent is to develop and field several optics as part of an imaging system with targeted spectral ranges.