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Precision Timing Studies for the CMS High Granularity Calorimeter Using Multiple Dedicated Timing Layers

Gawerc, Daniel and Pena, Cristian and Xie, Si and Apresyan, Artur and Duarte, Javier and Spiropulu, Maria (2017) Precision Timing Studies for the CMS High Granularity Calorimeter Using Multiple Dedicated Timing Layers. CMS Detector Note, 2017/008. . (Unpublished) http://resolver.caltech.edu/CaltechAUTHORS:20171208-192849777

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Abstract

The Compact Muon Solenoid (CMS) experiment records data from proton-proton collisions at the Large Hadron Collider (LHC) to measure properties of, and probe physics beyond, the Standard Model. The LHC High Luminosity upgrade will increase the number of instantaneous proton-proton collisions. The number of collisions per bunch crossing (pileup) will increase by one order of magnitude, posing an experimental challenge when trying to resolve the collision vertices. The CMS electromagnetic calorimeter (ECAL) is used to detect the energy of electrons and photons flying off from the collision. A possible solution to pileup obfuscation is to equip the new ECAL generation with precision timing capabilities. CMS has proposed a silicon-based High Granularity Calorimeter (HGC) to upgrade its current endcap ECAL. Each HGC layer has a hexagonal honeycomb lattice of pixel detectors. We present results from impinging 8-32 GeV electrons at the Fermilab Test Beam Facility using dedicated timing layers identical to the proposed CMS HGC but with an electronic readout capable of resolving time resolutions below 5 ps. When impinging 32 GeV electrons, we measure the device time resolution to be less than 15 ps and approximately 11 ps when combined with a similar layer positioned further down the beam line.


Item Type:Report or Paper (Technical Report)
ORCID:
AuthorORCID
Xie, Si0000-0003-2509-5731
Spiropulu, Maria0000-0001-8172-7081
Contact Email Address:dgawerc@caltech.edu
Additional Information:I would like to thank Maria Spiropulu for giving me this research opportunity. Additionally, much credit for this work is due to the invaluable help of Cristian Pena who provided much needed guidance, as well as Si Xie, Artur Apresyan, and Javier Duarte for assistance at Fermilab. Also helpful was the rest of the Caltech CMS collaboration, including but not limited to Dustin Anderson, Dorian Kcira, Jason Trevor, and the summer undergraduates doing research at Caltech. Finally, I’d like to recognize the Caltech SFP Office and Bill Davis Fellowship for providing funds for this research.
Group:CMS@Caltech
Funders:
Funding AgencyGrant Number
Bill Davis FellowshipUNSPECIFIED
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
CMS DN-2017/008
Record Number:CaltechAUTHORS:20171208-192849777
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20171208-192849777
Official Citation:Gawerc, D., et al. (2017), Precision Timing Studies for the CMS High Granularity Calorimeter Using Multiple Dedicated Timing Layers. CMS Detector Note CMS-DN-2017/008.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:83780
Collection:CaltechAUTHORS
Deposited By: Daniel Gawerc
Deposited On:14 Dec 2017 19:31
Last Modified:14 Dec 2017 19:31

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