Complete beam optics analysis along the Muon Campus External Beamline

Abstract

The Fermilab Mu2e experiment aims to measure the event ratio of the neutrinoless coherent conversion of muons to electrons in the field of an aluminum nucleus to ordinary capture as a means to probe the possibility of charged lepton flavor violation. Since the number of muons at the Mu2e production target is highly correlated to the upstream beam Twiss parameters, knowledge of these parameters is critical. Such measurement is not trivial since the accelerator line contains several bending magnets which can induce non-negligible dispersion. We discuss a methodology that in addition to the Twiss parameters can extract dispersion, slope of dispersion and momentum spread using only a set of beam profiles. We then apply this technique along the Fermilab Muon Campus and show it can play a significant role in maximizing the muon flux of the Mu2e Experiment.