The Use of WLS Fibers in a Hadronic Calorimeter for the HyperCP Experiment

摘要

Preliminary results are presented on the operational aspects of an ironscintillator sampling hadronic calorimeter used in the HyperCP experiment at Fermilab during the 1996-1997 fixed target run. The calorimeter used wavelength shifter fibers for light collection from scintillator sheets. Details of how the 2 m x 2 mm fibers were polished, sputtered, and used for the readout are discussed. The average reflectivity of the sputtered fibers was 0.85=-0.05, and the average attenuation lenghs were 3.48=-0.34 m. The calorimeter was designed to trigger on the proton (anti-proton) from LAMBDA ( LAMBDA ) decays, suppressing triggers from secondary interactions and background muons.