Geant4 Modeling and Experimental Demonstration of an Energy-Resolved Electron-Beam Profiler for Rep-Rated High-Energy-Density Physics Experiments

Novel petawatt-class, short-pulse laser facilities are presently capable of delivering high-intensity pulses at greater than 1 Hz repetition rates. These facilities can be used to generate extremely energetic particle beams. Many conventional diagnostics, however, employ single use recording media that impose severe limitations on shot rate. To effectively utilize these facilities, diagnostics must be upgraded from single-shot operation to comparable high repetition rates of the laser system. Here, we employ coded-aperture energy filters over a scintillating camera as a novel flexible electron beam profiler diagnostic to enable high-resolution, multi-spectral imaging. Geant4 was used to simulate particle interactions and trajectories, filter transmission profiles, and energy deposition in the scintillator. These simulations will inform the design of the diagnostic, characterize the detector response, and interpret experimental data to be shown and discussed.