A scintillating tile/fiber system for a high-energy calorimeter with high light yield and uniform longitudinal and transverse response

We have performed R and D for a tile/fiber calorimeter system. Using a multi-turn wave-length-shifting (WLS) fiber, the response of tile/fiber system was made uniform to within 2.5% over a tile. The response uniformity with respect to the tile size, which varies from 80 mm to 200 mm square, was controlled to within 3% (r.m.s.) by changing the WLS fiber length. Using a Hamamatsu R329 photomultiplier tube, the average light yield was greater than 2.5 photoelectrons per minimum ionizing particle. (orig.)