The FPD was mounted on the east tunnel platform extension, ~750 cm from the STAR interaction point for the FY01/02 run.  Its purpose is to measure energetic photons produced in collisions at the STAR interaction point.  For that run, two different technologies were tried:

• the north calorimeter (Yellow beam left) was a lead-scintillator sampling calorimeter capable of measuring longitudinal and transverse profiles of electromagnetic showers.

• the south calorimeter (Yellow beam right) was a 4×4 array of 1.5" × 1.5" × 18" Pb-glass detectors constructed by the IHEP, Protvino group for the E-704 experiment at Fermilab.

• the top and bottom calorimeters (above and below the beam pipe) were similar to the south calorimeter.