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Available on CMS information server CMS IN 2002/026 CMS Internal Note

Summary: Available on CMS information server CMS IN 2002/026
CMS Internal Note
The content of this note is intended for CMS internal use and distribution only
19 February 2002
Single Photoelectron Spectrum Measurements of
HF Calorimetry Candidate PMTs in The
University of Iowa PMT Test Station
U. Akgun, A.S. Ayan, M. Miller, J. Olson, Y. Onel, I. Schmidt
University of Iowa, Iowa City, USA
E. GĻulmez
Bogazici University, Istanbul, Turkey
Single Photoelectron Resolution measurements have been performed on candidate photomultiplier
tubes for HF Calorimeter. The description of the measurement techniques and the results are the
subject of this document.
The HF calorimeter is an important part of CMS detector. There are three main parts in HF calorimeter; absorber,
fibers and photomultipler tubes (PMT). For the optimum performance of HF calorimeter, we need to select the
best PMTs that we can get. Selection process involves evaluating the candidate PMTs for several characteristics,
including single photoelectron resolution (SPER), various timing characteristics, gain, dark current [1], linearity


Source: Akgun, Ugur - Department of Physics and Astronomy, University of Iowa


Collections: Physics