| Article | |
| Title | Electronics of LHCb calorimeter monitoring system |
| Author(s) | Konoplyannikov, A (CERN) |
| In: | Proceedings of the Topical Workshop on Electronics for Particle Physics, pp.392-396 |
| DOI | 10.5170/CERN-2008-008.392 |
| Subject category | Detectors and Experimental Techniques |
| Accelerator/Facility, Experiment | CERN LHC ; LHCb |
| Abstract | All calorimeter sub-detectors in LHCb, the Scintillator Pad Detector (SPD), the Preshower detector (PS), the Electromagnetic Calorimeter (ECAL) and the Hadron Calorimeter (HCAL) are equipped with the Hamamatsu photomultiplier tubes (PMT) as devices for light to electrical signal conversion [1]. The PMT gain behaviour is not stable in a time, due to changes in the load current and due to ageing. The calorimeter light emitting diode (LED) monitoring system has been developed to monitor the PMT gain over time during data taking. Furthermore the system will play an important role during the detector commissioning and during LHC machine stops, in order to perform tests of the PMTs, cables and FE boards and measurements of relative time alignment. The aim of the paper is to describe the LED monitoring system architecture, some technical details of the electronics implementation based on radiation tolerant components and to summarize the system performance. |
| Related document | Slides LHCb-TALK-2008-059 |
Record created 2009-11-06, last modified 2016-11-22
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