May 26 – 30, 2008
Biblioteca Universitaria, Pavia, Italy
Europe/Rome timezone

Dual-Readout Calorimetry with Crystals

Not scheduled
Salone Teresiano (Biblioteca Universitaria, Pavia, Italy)

Salone Teresiano

Biblioteca Universitaria, Pavia, Italy

Strada Nuova, 65
oral presentation New Techniques


Alessandro Cardini (INFN Cagliari)


The energy resolution of a calorimeter is determined by fluctuations. In almost all
calorimeters the electromagnetic shower fraction fluctuation dominate the energy
resolution for hadrons and jets. The DREAM sampling calorimeter was built to
eliminate this source of fluctuations by allowing a determination, on an
event-by-event basis, of the electromagnetic shower fraction. This is achieved by
sampling the energy deposited in the calorimeter with two different active media,
scintillating and quartz fibers, which measure respectively the scintillating and the
Cherenkov light produced by the shower. The energy resolution of the DREAM
calorimeter is however not only limited by the sampling fluctuations but also by the
small Cherenkov light yield (8 photoelectrons per GeV) which contributes more than
35%/sqrt(E) to the measured hadronic energy resolution. In order to improve this
we investigated the possibility of using the dual-readout
approach in homogeneous calorimeters. This can be done provided that a way is found
to distinguish the Cherenkov and the scintillating light produced by the shower in
the homogeneous medium. In this presentation a report on the studies performed with
lead-tungstate and BGO crystals will be given.

Primary authors

A. Astwood (TTU) Alessandro Cardini (INFN Cagliari) Antonio Policicchio (INFN Cosenza and Universita' della Calabria) Cecilia Voena (INFN Roma) Davide Pinci (INFN Roma) Eveline Meoni (INFN Cosenza and Universita' della Calabria) Francesco Lacava (INFN and Universita' Roma La Sapienza) Gabriella Gaudio (INFN and Universita' Pavia) Giancarlo Susinno (INFN Cosenza and Universita' della Calabria) Guido Ciapetti (INFN and Universita' Roma La Sapienza) Hans Paar (UCSD) I. Volobouev (TTU) John Hauptman (Iowa State University) Laura La Rotonda (INFN Cosenza and Universita' della Calabria) Marco Fraternali (INFN and Universita' Pavia) Michele Livan (INFN and Universita' Pavia) Nural Akchurin (TTU) Richard Wigmans (TTU) Roberto Ferrari (INFN Pavia) Silvia Franchino (INFN and Universita' Pavia) Sorina Popescu (TTU) T. Venturelli (INFN Cosenza and Universita' della Calabria) Vandelli Wainer (INFN and Universita' Pavia) Yun Roh (TTU)

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