Characterisation of signal-induced noise in Hamamatsu R11265 Multianode Photomultiplier Tubes
M. Andreotti, S. Capelli, G. Cavallero, S. Chiozzi, A. Cotta Ramusino,, C. D'Ambrosio, M. Fiorini, E. Franzoso, C. Frei, S. Gallorini, S. Gambetta,, C. Giugliano, C. Gotti, T. Gys, F. Keizer, M. Maino, B. Malecki, L. Minzoni,, S. Mitchell, I. Neri, A. Petrolini, D. Piedigrossi
TL;DR
This paper characterizes signal-induced noise in Hamamatsu R11265 Multianode Photomultiplier Tubes, analyzing its dependence on device and voltage, and discusses mitigation strategies for high-speed single-photon detection in particle physics experiments.
Contribution
It provides a detailed analysis of the noise characteristics and mitigation methods for R11265 PMTs used in high-rate photon counting applications.
Findings
Noise persists up to several microseconds after signals
Noise level varies with device and high-voltage settings
Mitigation strategies enable optimal 40 MHz single-photon counting
Abstract
Signal-induced noise is observed in Hamamatsu R11265 Multianode Photomultiplier Tubes, manifesting up to several microseconds after the single photoelectron response signal and localised in specific anodes. The mean number of noise pulses varies between devices, and shows significant dependence on the applied high-voltage. The characterisation of this noise and the mitigation strategies to perform optimal single-photon counting at 40 MHz, as required by the LHCb Ring-Imaging Cherenkov detectors, are reported.
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