  A new picture of pulsar high-energy emission is proposed that is different
from both the traditional polar cap and outer gap models, but combines elements
of each. The slot gap model is based on electron acceleration along the edge of
the open field region from the neutron star surface to near the light cylinder.
Along the last open field line, the pair formation front rises to very high
altitude forming a slot gap, where the accelerating electric field is
unscreened by pairs. The resulting radiation features both hollow cones from
the lower-altitude pair cascades, seen at small viewing angles, as well as
caustic emission on the trailing-edge field lines at high altitude, seen from
both poles at large viewing angle. The combination of the small solid angle of
slot gap emission (<< 1 sr) with a high probability of viewing the emission
predicts that more gamma-ray pulsars could be detected at larger distances. In
this picture, many of the positional coincidences of radio pulsars with
unidentified EGRET sources become plausible as real associations, as the flux
predicted by the slot gap model for many of the pulsars would provide the
observed EGRET source flux. The expected probability of seeing radio-quiet
gamma-ray pulsars in this model will also be discussed.
