Conference Presentation

PUBDB-2022-01792

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Latest Tests of the CMS HGCAL Tileboard Prototypes

De Silva, L. M. S. (Corresponding author)DESY*

2022

Abstract: For the HL-LHC phase, the calorimeter endcap of the CMS detector will be upgraded with a High Granularity Calorimeter (HGCAL), a sampling calorimeter that will use silicon sensors as well as scintillator tiles read out by silicon photomultipliers (SiPMs) as active material (SiPM-on-tile). The complete HGCAL will be operated at −30∘C. The SiPMs will be used in areas where the expected radiation dose during the lifetime of the detector is up to 5×1013 neq/cm2. The basic detector unit in the SiPM-on-tile part is the tile module, consisting of a PCB with one or two HGCROC ASICs, reading out up to 96 tiles with SiPMs. The design of the SiPM-on-tile part is inspired by the CALICE AHCAL.In the calorimeter, the response of each SiPM-on-tile on the energy scale will be calibrated using the MIP signal. This is compromised by radiation damage decreasing the scintillator light output and increasing the SiPM dark current-induced noise. SiPM irradiation tests provide data on the current increase as a function of accumulated neutron fluence. From this increase in current, the increase in noise for a fixed SiPM bias voltage can be predicted. Tests were conducted on SiPMs irradiated to 2×1012 neq/cm2 mounted on a tileboard, at temperatures ranging between −30∘C and +30∘C using a climate chamber. Results from these tests will be reported.

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Contributing Institute(s):

1. LHC/CMS Experiment (CMS)
2. Technol. zukünft. Teilchenph. Experim. (FTX)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. LHC: CMS

Appears in the scientific report 2022

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