Proton spectrum at the Jupiter laser facility of LLNL

This paper looks at tungsten samples irradiated by beams of protons, gammas, electrons and positrons at the Jupiter Laser Facility (JLF) of Lawrence Livermore National Laboratory (LLNL). The resulting unstable nuclei created are identified using their gamma spectra. From the data and known production thresholds, a proton spectrum is extracted. This spectrum can be used to calculate background events for future research utilizing the positron beam.