May 15 – 20, 2017
Shanghai Jiao Tong University
Asia/Shanghai timezone
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Investigation of the fast timing capabilities of the Silicon sensors for the CMS high granularity calorimeter

May 16, 2017, 2:00 PM
Haoran 102 (Shanghai Jiao Tong University)

Haoran 102

Shanghai Jiao Tong University

Xuhui Campus


Raman Khurana (National Central University (TW))


The High Granularity Calorimeter (HGCAL) is the technology choice of the CMS collaboration for the endcap calorimetry upgrade planned to cope with the harsh radiation and unprecedented in-time event pileup projected at the High Luminosity-LHC era. In this context, profiting from fast-timing information (~tens of picoseconds) embedded in the calorimeter would represent a unique capability for resolving information from individual collisions at the HL-LHC. This will enhance the reconstruction and physics capabilities of the CMS detector in terms of pileup mitigation and particle identification. The HGCAL is realized as a 52-layer sampling calorimeter, including 600m^2 of silicon sensors and 500m^2 of scintillators read by SiPMs. We present the concept and expected use of the precision-timing in the HGCAL, along with results from beam-tests of silicon sensors - both unirradiated and irradiated. We show that for signals in the silicon above a few tens of MIPs (minimum ionizing particles) the precision is of the order of 20ps.


poster presentation on behalf of CMS.

Primary author

Raman Khurana (National Central University (TW))

Presentation materials