Performance of the CMS High Granularity Calorimeter prototype to charged pion beams of 20$-$300 GeV/c

• Main Authors: Aras, U, Bakas, G, Bhowmik, D, Bilokin, S, Bouyjou, F, Bower, N, Braga, D, Brennan, L, Bryant, P, Buhmann, P, Canderan, K, Cankocak, K, Cao, X, Cauchois, A, Cheng, K. Y, Cheung, H, Demirbas, U, Dinaucourt, P, Dulucq, F, Dumanoglu, I, Dünser, M, Extier, S, Forthomme, L, Franzoni, G, Gadow, K, Gastaldi, F, Gastler, D, Ghosh, S, Gninenko, S, Göttlicher, P, Guler, Y, Hegde, V, Hinton, N, Hirschauer, J, Hoff, J, Hua, H, Hussain, A, Irles, A, Irshad, A, Isik, C, Jheng, H. R, Kachanov, V, Kalipoliti, L, Kaminskiy, A, Kałuzińska, O, Komm, M, Kristiansen, K, Krohn, M, Lai, Y, Lange, C, Lipton, R, Liu, G, Lu, R. S, Mallios, S, Mannelli, M, Martelli, A, Coco, S, Menkel, A, Milella, G, Moccia, S, Moortgat, F. W, Morrissey, I, Odell, N, Ozkorucuklu, S, Pandey, S, Paulini, M, Peitzmann, T, Pöschl, R, Quast, T, Quinn, R, Roberts, A, Sanchez, A. M, Rosado, M, Rose, A, Rovere, M, Schmidt, I, Shelake, M, Shukla, R, Sicking, E, De, M, Simkina, P, Smirnov, V, Srimanobhas, N, Steen, A, Sudo, Y, Tao, J, Tarabini, A, Troska, J, Tsipolitis, G, Urbanski, D, Wade, A, Wang, F, Wang, Z, Xiao, M, Yang, J, Yu, D, Miao, Y, Zacharopoulou, A, Zamiatin, N, Zhao, X
• Format: Journal Article
• Language: English
• Published: 09-11-2022
• Subjects: Physics - Instrumentation and Detectors
• DOI: 10.48550/arxiv.2211.04740

The upgrade of the CMS experiment for the high luminosity operation of the
LHC comprises the replacement of the current endcap calorimeter by a high
granularity sampling calorimeter (HGCAL). The electromagnetic section of the
HGCAL is based on silicon sensors interspersed between lead and copper (or
copper tungsten) absorbers. The hadronic section uses layers of stainless steel
as an absorbing medium and silicon sensors as an active medium in the regions
of high radiation exposure, and scintillator tiles directly readout by silicon
photomultipliers in the remaining regions. As part of the development of the
detector and its readout electronic components, a section of a silicon-based
HGCAL prototype detector along with a section of the CALICE AHCAL prototype was
exposed to muons, electrons and charged pions in beam test experiments at the
H2 beamline at the CERN SPS in October 2018. The AHCAL uses the same technology
as foreseen for the HGCAL but with much finer longitudinal segmentation. The
performance of the calorimeters in terms of energy response and resolution,
longitudinal and transverse shower profiles is studied using negatively charged
pions, and is compared to GEANT4 predictions. This is the first report
summarizing results of hadronic showers measured by the HGCAL prototype using
beam test data.