TY - JOUR TI - Understanding the Paul Scherrer Institute's PiM1 beamline for MUSE DO - https://doi.org/doi:10.7282/t3-py63-f028 PY - 2019 AB - In this thesis the proton radius puzzle will be described and used to motivated the MUSE experiment. An overview of the requirements for the systematic uncertainties for the experiment will then be presented, specifically the critically important understanding of the PiM1 magnetic channel. We will show that MUSE understands its systematic uncertainties well enough to have a competitive measurement of ep and μp elastic scattering. We will also show that the momentum of the μ’s and π’s can be measured to within 0.3% relative uncertainty for all MUSE momenta. By demonstrating our understanding of the source sizes and properties of the magnetic channel we also conclusively show that we understand the e momentum. The magnetic channel is simulated by two independent codes and it will be shown that MUSE understands how all particle types traverse the channel. KW - Physics and Astronomy KW - Protons -- Scattering LA - English ER -