Luminometer for the future International Linear Collider -Simulation and Beam Test Results

J. A. Aguilar*, B. Pawlik, S. Kulis, M. Idzik, M. Chrzaszcz, W. Daniluk, E. Kielar, J. Kotula, A. Moszczynski, K. Oliwa, W. Wierba, L. Zawiejski, K. Afanaciev, H. Henschel, A. Ignatenko, S. Kollowa, W. Lohmann, O. Novgorodova, S. Schuwalow, I. Levy

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


LumiCal will be the luminosity calorimeter for the proposed International Large Detector of the International Linear Collider (ILC). The ILC physics program requires the integrated luminosity to be measured with a relative precision on the order of 10e-3, or 10e-4 when running in GigaZ mode. Luminosity will be determined by counting Bhabha scattering events coincident in the two calorimeter modules placed symmetrically on opposite sides of the interaction point. To meet these goals, the energy resolution of the calorimeter must be better than 1.5% at high energies. LumiCal has been designed as a 30-layer sampling calorimeter with tungsten as the passive material and silicon as the active material. Monte Carlo simulation using the Geant4 software framework has been used to identify design elements which adversely impact energy resolution and correct for them without loss of statistics. BeamCal, covering polar angles smaller than LumiCal, will serve for beam tuning, luminosity optimisation and high energy electron detection. Secondly, prototypes of the sensors and electronics for both detectors have been evaluated during beam tests, the results of which are also presented here.

Original languageEnglish
Pages (from-to)258-265
Number of pages8
JournalPhysics Procedia
StatePublished - 2012
Event2nd International Conference on Technology and Instrumentation in Particle Physics, TIPP 2011 - Chicago, United States
Duration: 9 Jun 201114 Jun 2011


  • BeamCal
  • ILC
  • LumiCal
  • forward calorimetry


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