Speaker
Description
Heavy ion reactions can be used to provide constraints on the density dependence of the Equation of State (EoS) of dense nuclear matter, helping constrain the EoS of neutron stars. The SAMURAI Pion-Reconstructing and Ion-Tracker (SπRIT) TPC is a device for measuring the pion yields of heavy ion reactions using the SAMURAI magnet at RIKEN for providing these constraints. In 2024 an experiment was performed using the SπRIT TPC at RIBF at RIKEN to compare pion yields for 124Xe+112Sn and 136Xe+124Sn reactions. For this experiment, a modified version of the FRIBDAQ was used with GET for improved reliability. TPCs can present certain analysis challenges. The SπRITROOT analysis code is used to obtain particle identification and momentum of particles coming out of the collisions into the TPC by fitting the curve of the tracks in the SAMURAI magnet. Space charge from the heavy beam passing through the TPC must be corrected for by modeling the sheet charge of the ionized gas. Efficiency can be found through simulating pions embedded into real data to account for geometry and the density of tracks in high multiplicity events.