Status of the Nab Experiment

The Nab experiment seeks to measure the electron-neutrino correlation coefficient, $a$, with a fractional uncertainty of .001. The experiment is now preparing for installation on the Fundamental Physics Beamline at ORNL-SNS. The angle between the electron and neutrino is reconstructed from the recoil proton time of flight in a magnetic field expansion spectrometer. I will review the principles of operation of the spectrometer, discuss the progress towards installation, and review the statistical and systematic uncertainty budgets.