The MUSE FPGA Trigger* Shraddha Dogra Rutgers

The MUSE experiment measures the elastic scattering of electrons and muons from a liquid hydrogen target at the PiM1 beam line of the Paul Scherrer Institute in Villigen, Switzerland. PiM1 provides a mixed beam of electrons, muons, and pions, so the particle rate in the scattered particle detectors is dominated by pion decays and pion scattering from the target. To efficiently obtain data on the much lower rate elastic electromagnetic scattering, we employ a variety of strategies based on segmented fast scintillators that send signals to FPGAs so that the species of all beam particles can be determined and scattering events from the target can be identified. I will discuss the MUSE triggering strategy and performance.