T. Nicholls et al., PERFORMANCE OF AN ELECTROMAGNETIC LEAD SCINTILLATING-FIBER CALORIMETER FOR THE H1 DETECTOR/, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 374(2), 1996, pp. 149-156
The properties of final modules of a high resolution lead/scintillatin
g-fibre calorimeter to upgrade the backward region of the H1 detector
were studied with electrons in the energy range from 2-60 GeV. The ele
ctromagnetic calorimeter consists of scintillating fibres with a diame
ter of 0.5 mm embedded in a lead matrix. This small fibre radius, in c
ombination with a lead-to-fibre ratio of 2.27:1, ensures excellent ene
rgy resolution which has been measured to be sigma/E=7.1%/root E/GeV+1
.0%. The spatial resolution as a function of energy for impact points
at the center of a cell is given by 4.4 mm/root E/GeV+1.0 mm. The time
resolution was found to be better than 0.4 ns.