학술논문
Performance of the Electromagnetic Pixel Calorimeter Prototype EPICAL-2
Document Type
Working Paper
Author
Alme, J.; Barthel, R.; van Bochove, A.; Borshchov, V.; Bosley, R.; Brink, A. van den; Broeils, E.; Büsching, H.; Eikeland, V. N.; Groettvik, O. S.; Han, Y. H.; van der Kolk, N.; Kim, J. H.; Kim, T. J.; Kwon, Y.; Mager, M.; Malik, Q. W.; Okkinga, E.; Park, T. Y.; Peitzmann, T.; Pliquett, F.; Protsenko, M.; Reidt, F.; van Rijk, S.; Røed, K.; Rogoschinski, T. S.; Röhrich, D.; Rossewij, M. J.; Ruis, G. B.; Solheim, E. H.; Tymchuk, I.; Ullaland, K.; Watson, N. K.; Yokoyama, H.
Source
Subject
Language
Abstract
The first evaluation of an ultra-high granularity digital electromagnetic calorimeter prototype using 1.0-5.8 GeV/c electrons is presented. The $25\times10^6$ pixel detector consists of 24 layers of ALPIDE CMOS MAPS sensors, with a pitch of around 30~$\mu$m, and has a depth of almost 20 radiation lengths of tungsten absorber. Ultra-thin cables allow for a very compact design. The properties that are critical for physics studies are measured: electromagnetic shower response, energy resolution and linearity. The stochastic energy resolution is comparable with the state-of-the art resolution for a Si-W calorimeter, with data described well by a simulation model using GEANT and Allpix$^2$. The performance achieved makes this technology a good candidate for use in the ALICE FoCal upgrade, and in general demonstrates the strong potential for future applications in high-energy physics.
Comment: 30 pages, 19 figures, submitted to JINST
Comment: 30 pages, 19 figures, submitted to JINST