Proton Spallation Cross -Section Measurement Experiments for Cr, Mn, Al, Co and Mg for the TIGERISS mission

The PIONEERS-selected mission TIGERISS, planned to launch to the ISS in 2026, will provide, for the first time, single-element resolution galactic cosmic-ray elemental abundance spanning the periodic table, from 5B up to 82Pb, to further our understanding of the grand cycle of matter in the galaxy. Such wide-range, fine-resolution experimental data would be best combined with the latest developments in astrophysical models, but the current accuracy of nuclear isotopic production cross sections is far behind experimental data, so GALPROP is updating its current cross section library with newer reaction channels and more accurate data on existing channels. To that end, we performed an experiment at NASA Space Radiation Lab (Brookhaven National Laboratory), in March 2024 to determine proton spallation cross sections for isotopes of Co, Mn, Al and Cr. These isotopes are important for TIGERISS, because several recent studies have indicated that improvements in the uncertainties of spallation cross section measurements of sub-Fe region isotopes are required for constraining geometric properties of diffusion models. We will present the results of this experiment, as well as the details of another upcoming cross section measurement experiment at CERN, where a Mg24 beam will be bombarded on to a liquid H target, scheduled for beam run in late Nov 2024.