Testbeam results for a Shashlik calorimeter with longitudinal segmentation

Ask, S Benvenuti, AC Britvich, I Camporesi, T Checchia, P Feniouk, A Hedberg, V Lishin, V Margoni, M Mazzucato, M Obraztsov, V Paganoni, M Poliakov, V Simonetto, F Terranova, F Vlassov, E

S. Ask et al., Testbeam results for a Shashlik calorimeter with longitudinal segmentation, IEEE NUCL S, 48(4), 2001, pp. 1127-1131

9

INGLESE

Article

Apllied Physucs/Condensed Matter/Materiales Science","Nuclear Emgineering

IEEE TRANSACTIONS ON NUCLEAR SCIENCE

0018-9499 → ACNP

48

4

2001

1

1127 - 1131

ISI

0018-9499(200108)48:4<1127:TRFASC>2.0.ZU;2-0

In the frame of research and development for electromagnetic calorimetry at future e(+)e(-) linear colliders, different techniques have been studied t o implement longitudinal segmentation in Shashlik calorimeters. Two prototy pes with 5 x 5 cm(2) lead/scintillator towers and readout by means of wavel ength-shifting fibers have been built. The longitudinal segmentation of the shower is achieved by modifying the front part of the detector. In the fir st prototype, vacuum photodiodes have been inserted laterally for the first eight X-0, while in the second prototype a slow scintillator has been used in the first five Xo. Both of the prototypes have been exposed to beam at CERN. The performance in term of energy resolution, spatial resolution, and e/pi separation are described.