The resolution and the linearity of time measurements made with the CMS electromagnetic calorimeter are studied with samples of data from test beam electrons, cosmic rays, and beam-produced muons. The resulting time resolution measured by lead tungstate crystals is better than 100 ps for energy deposits larger than 10 GeV. Crystal-to-crystal synchronization with a precision of 500 ps is performed using muons produced with the first LHC beams in 2008.

Time reconstruction and performance of the CMS electromagnetic calorimeter

Bianchini L.;MESSINEO, ALBERTO MARIA;TONELLI, GUIDO EMILIO;RIZZI, ANDREA;
2010-01-01

Abstract

The resolution and the linearity of time measurements made with the CMS electromagnetic calorimeter are studied with samples of data from test beam electrons, cosmic rays, and beam-produced muons. The resulting time resolution measured by lead tungstate crystals is better than 100 ps for energy deposits larger than 10 GeV. Crystal-to-crystal synchronization with a precision of 500 ps is performed using muons produced with the first LHC beams in 2008.
2010
Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.; Adam, W.; Arnold, B.; Bergauer, H.; Bergauer, T.; Dragicevic, M.; Eichberger, M.; Eroe, J.; Friedl, ...espandi