aCORN Backscatter-suppressing Electron Detector

A description and status report of the beta spectrometer for the upcoming experiment, \emph{aCORN}, will be presented. The experiment measures the electron-antineutrino correlation in neutron beta decay. Electron backscatter from the electron energy detector produces a low-energy tail that can cause a large systematic error in the experiment. The spectrometer is designed to veto more than 90\% of the backscattered electrons and measure the electron energy with a resolution of better than 20\%. A prototype was built and tested, and the final version has now been assembled.