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Design And Test Of A Prototype Gas-Sampling Electromagnetic Calorimeter Of High Granularity For The Cplear Experiment

R. Adler,G. Backenstoss,P. Bloch,D. Damianoglou,P. Dechelette,M. Dröge,C. Felder,W. Fetscher,M. Fidecaro,D. Garreta,H.-J. Gerber,P. Gumplinger,H.U. Johner,J. Kern,P. Kokkas,U. Mall,F. Nanni,P. Pavlopoulos,M. Renevey,C. Santoni,A. Schopper,L. Tauscher,H. Wendler,B. Pagels,C. Witzig

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT（1992）

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Abstract
We have designed and tested a gas-sampling calorimeter of high granularity as a prototype for the electromagnetic calorimeter of the CPLEAR experiment. The prototype calorimeter, consisting of 18 layers of 1.5 mm thin lead converters interleaved with a total of 1152 high-gain tubes and 2304 pick-up strips, was tested in a tagged photon beam with photons in the energy range of 50 to 350 MeV. It well fulfilled the requirements of a good detection efficiency for photons above 50 MeV with a spatial resolution sigma almost-equal-to 5 mm for the photon conversion point and an energy resolution sigma(E)/E almost-equal-to 15% square-root E[GeV].
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spatial resolution
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