Eur. Phys. J. C (2007) 52: 495-506
https://doi.org/10.1140/epjc/s10052-007-0380-x

Special Article - Tools for Experiment and Theory

Performance studies of prototype II for the CASTOR forward calorimeter at the CMS experiment

¹ Dept. of Phys., University of Ioannina, PO Box 1186, 45110, Ioannina, Greece
² Dept. of Phys., University of Cukurova, 01330, Adana, Turkey
³ Institute of Nuclear Physics, Radzikowskiego 152, 31342, Kraków, Poland
⁴ PH Dept., CERN, 1211, Geneva 23, Switzerland
⁵ Phys. Dept., University of Athens, 15701, Athens, Greece
⁶ Institute of Nuclear Research, 117312, Moscow, Russia
⁷ NRC “Demokritos” INP, PO Box 60228, 15310, Ioannina, Greece
⁸ Dept. of Physics, Northeastern University, MA 02115, Boston, USA
⁹ ITEP, 117259, Moscow, Russia

^* e-mail: david.d'enterria@cern.ch

Received: 26 December 2006
Revised: 18 June 2007
Published online: 5 September 2007

Abstract

We present results of the performance of the second prototype of the CASTOR quartz–tungsten sampling calorimeter, to be installed in the very forward region of the CMS experiment at the LHC. The energy linearity and resolution, as well as the spatial resolution of the prototype to electromagnetic and hadronic showers are studied with E=20–200 GeV electrons, E=20–350 GeV pions, and E=50, 150 GeV muons from beam tests carried out at CERN/SPS in 2004. The responses of the calorimeter using two different types of photodetectors (avalanche photodiodes APDs, and photomultiplier tubes PMTs) are compared.