High rate tests of the photon detection system for the LHCb RICH Upgrade
Dec 21, 20173 pages
Part of Proceedings, 9th International Workshop on Ring Imaging Cherenkov Detectors (RICH 2016) : Bled, Slovenia, September 5-9, 2016, 101-103
Published in:
- Nucl.Instrum.Meth.A 876 (2017) 101-103
Contribution to:
- , 101-103
- RICH 2016
- Published: Dec 21, 2017
e-Print:
- 1801.02623 [physics.ins-det]
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Abstract: (submitter)
The photon detection system for the LHCb RICH Upgrade consists of an array of multianode photomultiplier tubes (MaPMTs) read out by custom-built modular electronics. The behaviour of the whole chain was studied at CERN using a pulsed laser. Threshold scans were performed in order to study the MaPMT pulse-height spectra at high event rates and different photon intensities. The results show a reduction in photon detection efficiency at 900 V bias voltage, marked by a 20% decrease in the single-photon peak height, when increasing the event rate from 100 kHz to 20 MHz. This reduction was not observed at 1000 V bias voltage.Note:
- Submitted to Nuclear Instruments and Methods in Physics Research A
- LHCb RICH Upgrade
- 40 MHz event rate
- MaPMT
- RICH: upgrade
- laser: pulsed
- LHC-B
- photomultiplier
- efficiency
- performance
References(5)
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