  A photon detector for BNL experiment E949 is described. The detector consists
of lead/scintillator ``sandwich'' of 25 layers of 5 mm thick scintillator BC404
and 24 layers of 2 mm lead absorber. Readout is implemented with 30-60 cm long
WLS fibers (BCF99-29AA) glued into grooves in the BC404. Average yield was
measured with cosmic rays to be about 43 p.e./MeV. Extruded plastic
scintillation counters developed for sandwich detectors of photons for the
KOPIO experiment are also described. For a 7 mm thick counter with 4.3 m long
WLS fibers spaced at 7 mm a light yield of 18.7 p.e./MeV and time resolution of
0.71 ns were obtained. A prototype photon veto module consisting of 10 layers
of 7 mm thick extruded plastic slabs interleaved with 1 mm lead sheets was
tested.
