Dynamic exploding foil initiator imaging at the advanced photon source

摘要: Recent advances in diagnostics coupled with synchrotron sources have allowed the in-situ investigation of exploding foil initiators (EFI) during flight. We present first images EFIs flight utilizing x-ray phase contrast imaging at Advanced Photon Source (APS) located Argonne National Laboratory. These provided DOE/DoD community unprecedented resolving details on micron scale flyer formation, plasma instabilities and in-flight characteristics along subsequent interaction high explosives nanosecond time scale. Phase has ability to make dynamic measurements length necessary resolve initiator function provide insight key design parameters. efforts also probed fundamental physics “burst” better understand what burst means a physical sense, rather than traditional understanding as peak voltage increase resistance. This led increased knowledge mechanisms us improve our predictive capability through magnetohydrodnamic modeling. manuscript presents results from several EFI designs look future for upcoming work.