  Directional detection of Dark Matter particles (DM) in the MeV mass range
could be accomplished by studying electron recoils in large arrays of parallel
carbon nanotubes. In a scattering process with a lattice electron, a DM
particle might transfer sufficient energy to eject it from the nanotube
surface. An external electric field is added to drive the electron from the
open ends of the array to the detection region. The anisotropic response of
this detection scheme, as a function of the orientation of the target with
respect to the DM wind, is calculated, and it is concluded that no direct
measurement of the electron ejection angle is needed to explore significant
regions of the light DM exclusion plot. A compact sensor, in which the cathode
element is substituted with a dense array of parallel carbon nanotubes, could
serve as the basic detection unit.
