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ISSN - 10637788, EISSN - 1562692X, Physics of Atomic Nuclei, 2015, vol. 78, 13, p. 1544-1551

Barrel calorimeter of the CMD-3 detector

Shebalin V. E., Anisenkov A. V., Aulchenko V. M., Bashtovoy N. S., Epifanov D. A., Epshteyn L. B., Grebenuk A. A., Ignatov F. V., Erofeev A. L., Kovalenko O. A., Kozyrev A. N., Kuzmin A. S., Logashenko I. B., Mikhailov K. Yu, Razuvaev G. P., Ruban A. A., Shwartz B. A., Talyshev A. A., Titov V. M., Yudin Yu V.

© 2015, Pleiades Publishing, Ltd. The structure of the barrel calorimeter of the CMD-3 detector is presented in this work. The procedure of energy calibration of the calorimeter and the method of photon energy restoration are described. The distinctive feature of this barrel calorimeter is its combined structure; it is composed of two coaxial subsystems: a liquid xenon calorimeter and a crystalline CsI calorimeter. The calorimeter spatial resolution of the photon conversion point is about 2 mm, which corresponds to an angular resolution of ∼6 mrad. The energy resolution of the calorimeter is about 8% for photons with energy of 200 MeV and 4% for photons with energy of 1 GeV.