The STACEE-32 Ground Based Gamma-ray Detector
  We describe the design and performance of the Solar Tower Atmospheric Cherenkov Effect Experiment detector in its initial configuration (STACEE-32). STACEE is a new ground-based gamma ray detector using the atmospheric Cherenkov technique. In STACEE, the heliostats of a solar energy research array are used to collect and focus the Cherenkov photons produced in gamma-ray induced air showers. The large Cherenkov photon collection area of STACEE results in a gamma-ray energy threshold below that of previous detectors. 
STACEE Collaboration: D.S. Hanna, D. Bhattacharya, L.M. Boone, M.C.   Chantell, Z. Conner, C.E. Covault, M. Dragovan, P. For...