  We describe an apparatus used to measure the electron-antineutrino angular
correlation coefficient in free neutron decay. The apparatus employs a novel
measurement technique in which the angular correlation is converted into a
proton time-of-flight asymmetry that is counted directly, avoiding the need for
proton spectroscopy. Details of the method, apparatus, detectors, data
acquisition, and data reduction scheme are presented, along with a discussion
of the important systematic effects.
