Time measurement with the SND electromagnetic calorimeter

Vladimir Druzhinin; Aleksandr Korol; Natalya Melnikova; Sergey Serednyakov; Ilya Surin

doi:10.1051/epjconf/202024501034

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Proceedings

Open Access

EPJ Web of Conferences 245, 01034 (2020)
https://doi.org/10.1051/epjconf/202024501034

Time measurement with the SND electromagnetic calorimeter

Vladimir Druzhinin¹^,2, Aleksandr Korol¹^,2, Natalya Melnikova¹^,2^*, Sergey Serednyakov¹^,2 and Ilya Surin¹^,2

¹ Budker Institute of Nuclear Physics, 11, Acad. Lavrentieva Pr., Novosibirsk, 630090 Russian Federation
² Novosibirsk State University 1, Pirogova str., Novosibirsk, 630090, Russian Federation

^* e-mail: N.A.Melnikova@inp.nsk.su

Published online: 16 November 2020

Abstract

The SND is a non-magnetic detector deployed at the VEPP-2000 e⁺e⁻ collider (BINP, Novosibirsk) for hadronic cross-section measurements in the center of mass energy range below 2 GeV. The important part of the detector is a three-layer hodoscopic electromagnetic calorimeter (EMC) based on NaI(Tl) counters. Until the recent EMC spectrometric channel upgrade, only the measurement of the energy deposition in counters was possible. New EMC signal digitizing electronics based on FADC allow us to obtain also the signal arrival time. The new electronics and supporting software, including digitized signal processing algorithms, are now used for data taking in the ongoing experiment. We discuss the amplitude and time extraction algorithms, the new system performance on experimental events and how this time measurement can be applied to physics analysis.

© The Authors, published by EDP Sciences, 2020

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.