Article

Beam tests of the ZEUS barrel calorimeter

Argonne National Laboratory, Argonne, IL, USA; Columbia University, New York, NY, USA; Nevis Laboratories, Irvington-on-Hudson, NY, USA; University of Iowa, Iowa City, IA, USA; Louisiana State University, Baton Rouge, LA, USA; Ohio State University, Columbus, OH, USA; Pennsylvania State University, University Park, PA, USA; Virginia Polytechnic Institute, and State University, Blacksburg, VA, USA; University of Wisconsin, Madison, WI, USA
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment DOI:10.1016/0168-9002(93)91078-2 pp.23-52

ABSTRACT A fully compensating uranium—scintillator calorimeter was constructed for the ZEUS detector at HERA. Several of the barrel calorimeter modules were subjected to beam tests at Fermilab before shipping them to DESY for installation. The calibrations of the modules used beams of electrons and hadrons, measuring the uniformity of the response, and checking the resolution. The runs also provided opportunity to test a large fraction of the actual ZEUS calorimeter readout system in an integrated beam environment more than one year before HERA turn on. The experiment utilized two computer controlled mechanical structures, one of which was capable of holding up to four modules in order to study shower containment, and a magnetic spectrometer with a high resolution beam tracking system. During two running periods, beams of 6 to 110 GeV containing e, μ, π, and were used. The results show energy resolutions of for hadrons and for electrons, uniformities at the 1% level, energy nonlinearity less than 1%, and equal response for electrons and hadrons.

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Keywords

actual ZEUS calorimeter readout system
 
barrel calorimeter modules
 
beam tests
 
beams
 
compensating uranium—scintillator calorimeter
 
DESY
 
electrons
 
energy resolutions
 
experiment utilized
 
Fermilab
 
HERA
 
integrated beam environment
 
large fraction
 
mechanical structures
 
modules
 
one year
 
study shower containment
 
uniformity
 
ZEUS detector
 

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