NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT
Abstract
The KLOE detector is designed primarily for the study of direct CP violation in KO decays. The electromagnetic calorimeter, EmC, is a most demanding element of the detector. Two prototypes of the EmC (one for the barrel and one for the end-cap region) have been built at Frascati and tested at PSI (Switzerland) using beams of electrons, muons and pions of 40 to 290 MeV/e momentum, and at the Frascati LADON facility using photons of 20 to 80 MeV. We observe excellent linearity from 20 to 290 MeV. The energy resolution is sigma(E)/E similar to 4.4%/root E(GeV) and the time resolution is similar to 34 ps/root E(GeV). We found little dependence on incidence angle and entry position. We also determined that some pi/mu identification is possible.
