Response of a CMS HGCAL silicon-pad electromagnetic calorimeter prototype to 20-300 GeV positrons
Document Type
Article
Publication Date
5-1-2022
Abstract
The Compact Muon Solenoid collaboration is designing a new high-granularity endcap calorimeter, HGCAL, to be installed later this decade. As part of this development work, a prototype system was built, with an electromagnetic section consisting of 14 double-sided structures, providing 28 sampling layers. Each sampling layer has an hexagonal module, where a multipad large-area silicon sensor is glued between an electronics circuit board and a metal baseplate. The sensor pads of approximately 1.1 cm(2) are wire-bonded to the circuit board and are readout by custom integrated circuits. The prototype was extensively tested with beams at CERN's Super Proton Synchrotron in 2018. Based on the data collected with beams of positrons, with energies ranging from 20 to 300 GeV, measurements of the energy resolution and linearity, the position and angular resolutions, and the shower shapes are presented and compared to a detailed GEANT4 simulation.
Keywords
Calorimeters, Large detector systems for particle and astroparticle physics, Si microstrip and pad detectors
Divisions
Science
Funders
BMBWF (Austria),Austrian Science Fund (FWF),CERN,Chinese Academy of Sciences
Publication Title
Journal of Instrumentation
Volume
17
Issue
5
Publisher
IOP Publishing Ltd
Publisher Location
TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND