NDLI: First results from the CMS SiPM-based hadronic endcap calorimeter

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First results from the CMS SiPM-based hadronic endcap calorimeter

Content Provider	Scilit
Author	Guio, Federico De
Copyright Year	2019
Description	Journal: Journal of Physics: Conference Series The CMS hadronic calorimeter employs a plastic-scintillator-based endcap detector. In early 2017, a 20° wedge of the endcap was upgraded with silicon photomultipliers (SiPMs) and readout electronics based on the QIE11 digitizer. Based on the excellent experience with this 20° pilot system in 2017, the entire endcap detector was upgraded with SiPMs in early 2018. We report on the first ever operation of SiPMs in a high-rate collider detector. We compare SiPM performance to that of the previous hybrid photodiode / QIE8-based readout and describe how the factor three improvement in photon-detection efficiency, increased longitudinal segmentation, and improved response stability allow for mitigation of scintillator radiation damage and simplified calibration. We report in situ measurements of radiation-induced SiPM dark current. Overall, we show that the upgraded SiPM-based system brings more than 50% improvement in radiation-induced response degradation.
Related Links	https://iopscience.iop.org/article/10.1088/1742-6596/1162/1/012009/pdf
ISSN	17426588
e-ISSN	17426596
DOI	10.1088/1742-6596/1162/1/012009
Journal	Journal of Physics: Conference Series
Issue Number	1
Volume Number	1162
Language	English
Publisher	IOP Publishing
Publisher Date	2019-01-01
Access Restriction	Open
Subject Keyword	Journal: Journal of Physics: Conference Series Nuclear Energy and Engineering
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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