Construction and Commissioning of the Nab Detector System*

The Neutron a, b experiment (Nab) will measure the electron-neutrino correlation parameter and Fierz interference term (‘a’ and ‘b’ respectively) as a test of the Standard Model. The Nab experiment will have two detector systems, one installed at either end of a large spectrometer magnet on the Fundamental Physics Beam line at Oak Ridge National Laboratory’s Spallation Neutron Source. These detectors will be sensitive enough to detect the low energy proton as well as accurately determine electron energy. Each system consists of a 127 segment silicon detector and its associated electronics, vacuum, and cooling systems. This talk will present the status of the assembly and initial testing at Los Alamos National Laboratory as well as the status of additional detector characterization to be performed at the University of Manitoba.