Nab Detector Timing Studies

Precise measurements of neutron beta decay correlations provide a potential window to new physics related to the weak sector. The Nab experiment will measure the electron-neutrino correlation coefficient and Fierz interference term to as of yet unattained precision. Observables for Nab are electron energy and proton time of flight, which can be converted to proton momentum. Nab's error budget calls for proton time of flight uncertainty less than or equal to 0.3 ns. One major systematic in proton time of flight is detector charge collection time. To characterize this, Nab will have to do a high precision in situ measurement of the Nab Si detector charge collection time as a function of particle ID and energy. This talk will focus on our planned procedure as well as detector background and other measurements done in preparation.