Eur. Phys. J. C (2008) 57: 653-663
https://doi.org/10.1140/epjc/s10052-008-0756-6

Special Article - Tools for Experiment and Theory

Design, performance, and calibration of the CMS hadron-outer calorimeter

¹ Yerevan Physics Institute, Yerevan, Armenia
² NCPHEP, Minsk, Belarus
³ Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Science, Sofia, Bulgaria
⁴ KFKI-RMKI, Research Institute for Particle and Nuclear Physics, Budapest, Hungary
⁵ ATOMKI, Debrecen, Hungary
⁶ Panjab University, Chandigarh, 160 014, India
⁷ Tata Institute of Fundamental Research, Mumbai, India
⁸ Institute for Studies in Theoretical Physics, Sharif University of Technology, Tehran, Iran
⁹ Università di Trieste e Sezione dell’ INFN, Trieste, Italy
¹⁰ JINR, Dubna, Russia
¹¹ ITEP, Moscow, Russia
¹² Moscow State University, Moscow, Russia
¹³ IHEP, Protvino, Russia
¹⁴ CERN, Geneva, Switzerland
¹⁵ Cukurova University, Adana, Turkey
¹⁶ Middle East Technical University, Ankara, Turkey
¹⁷ Bogazici University, Istanbul, Turkey
¹⁸ KIPT, Kharkov, Ukraine
¹⁹ Single Crystal Institute, Kharkov, Ukraine
²⁰ Iowa State University, Ames, IA, USA
²¹ Fermi National Accelerator Laboratory, Batavia, IL, USA
²² Boston University, Boston, MA, USA
²³ University of Illinois at Chicago, Chicago, IL, USA
²⁴ University of Maryland, College Park, MD, USA
²⁵ Fairfield University, Fairfield, CT, USA
²⁶ University of Iowa, Iowa City, IA, USA
²⁷ Texas Tech University, Lubbock, TX, USA
²⁸ Florida Institute of Technology, Melbourne, FL, USA
²⁹ Florida International University, Miami, FL, USA
³⁰ University of Minnesota, Minneapolis, MN, USA
³¹ Rockefeller University, New York, NY, USA
³² University of Notre Dame, Notre Dame, IN, USA
³³ University of Mississippi, Oxford, MS, USA
³⁴ Princeton University, Princeton, NJ, USA
³⁵ Brown University, Providence, RI, USA
³⁶ University of Rochester, Rochester, NY, USA
³⁷ Florida State University, Tallahassee, FL, USA
³⁸ Purdue University, West Lafayette, IN, USA

^* e-mail: Sunanda.Banerjee@cern.ch

Received: 13 August 2008
Published online: 10 October 2008

Abstract

The Outer Hadron Calorimeter (HCAL HO) of the CMS detector is designed to measure the energy that is not contained by the barrel (HCAL HB) and electromagnetic (ECAL EB) calorimeters. Due to space limitation the barrel calorimeters do not contain completely the hadronic shower and an outer calorimeter (HO) was designed, constructed and inserted in the muon system of CMS to measure the energy leakage. Testing and calibration of the HO was carried out in a 300 GeV/c test beam that improved the linearity and resolution. HO will provide a net improvement in missing E _T measurements at LHC energies. Information from HO will also be used for the muon trigger in CMS.