  We propose the first truly directional antineutrino detector for
antineutrinos above the hydrogen inverse beta decay (IBD) threshold, with
potential applications including monitoring for nuclear nonproliferation,
spatially mapping geo-neutrinos, characterizing the diffuse supernova neutrino
background, and searching for new physics in the neutrino sector. The detector
consists of adjacent and separated target and capture scintillator planes. IBD
events take place in the target layers, which are thin enough to allow the
neutrons to escape without scattering elastically. The neutrons are detected in
the thicker, boron-loaded capture layers. The location of the IBD event and the
momentum of the positron are determined by tracking the positron's trajectory
through the detector. Our design is a straightforward modification of existing
antineutrino detectors; a prototype could be built with existing technology.
