Nucleon Detection Efficiency for the Segmented Sampling Hadron Calorimeter Deployed in the Super BigBite Spectrometer

In the first experiment using the Super BigBite spectrometer (SBS), the G_Mⁿ run group measured elastic neutron and proton cross sections to extract the neutron's magnetic Sachs form factor (G_Mⁿ, five Q² points from 3.5 to 13.6 GeV²) and the two photon exchange contribution to electron-neutron elastic scattering (nTPE). Both experiments employed the "ratio" method where d(e,e'p) and d(e,e'n) are measured simultaneously in order to cancel many sources of systematic error in the neutron/proton cross section ratio. While electron detection efficiency from the BigBite arm cancels on the ratio, proton and neutron detection efficiencies in the Hadron Calorimeter (HCal) do not and are necessary for weighted nucleon yields and ultimately cross sections. In this talk HCal detector performance, benchmark simulation results, and preliminary efficiencies from G_Mⁿ data will be discussed.