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arXiv · 0709.4514

An Improved Shashlyk Calorimeter

G. S. Atoian·G. I. Britvich·S. K. Chernichenko·S. Dhawan·V. V. Issakov·O. V. Karavichev·T. L. Karavicheva·V. N. Marin·A. A. Poblaguev·I. V. Shein·A. P. Soldatov·M. E. Zeller
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Abstract

Shashlyk electromagnetic calorimeter modules with an energy resolution of about 3%/sqrt{E (GeV)} for 50-1000 MeV photons has been developed, and a prototype tested. Details of these improved modules, including mechanical construction, selection of wave shifting fibers and photo-detectors, and development of a new scintillator with improved optical and mechanical properties are described. How the modules will perform in a large calorimeter was determined from prototype measurements. The experimentally determined characteristics of the calorimeter prototype show energy resolution of sigma_E/E=(1.96+-0.1)% \oplus (2.74+-0.05)%/sqrt{E}, time resolution of sigma_T = (72+-4)/sqrt{E} \oplus (14+-2)/E (ps), where photon energy E is given in GeV units and \oplus means a quadratic summation. A punch-through inefficiency of photon detection was measured to be ε= 5*10^{-5} (Θ>5 mrad).

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G. S. Atoian, G. I. Britvich, S. K. Chernichenko, S. Dhawan, V. V. Issakov, O. V. Karavichev, T. L. Karavicheva, V. N. Marin, A. A. Poblaguev, I. V. Shein, A. P. Soldatov, M. E. Zeller. 2007-09-28. An Improved Shashlyk Calorimeter. https://doi.org/10.1016/j.nima.2007.10.022

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