Performance of the Electromagnetic Pixel Calorimeter Prototype EPICAL-2
Abstract
The first evaluation of an ultra-high granularity digital electromagnetic calorimeter prototype using 1.0-5.8 GeV/c electrons is presented. The pixel detector consists of 24 layers of ALPIDE CMOS MAPS sensors, with a pitch of around 30~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. 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.
Cite
@article{arxiv.2209.02511,
title = {Performance of the Electromagnetic Pixel Calorimeter Prototype EPICAL-2},
author = {J. Alme and R. Barthel and A. van Bochove and V. Borshchov and R. Bosley and A. van den Brink and E. Broeils and H. Büsching and V. N. Eikeland and O. S. Groettvik and Y. H. Han and N. van der Kolk and J. H. Kim and T. J. Kim and Y. Kwon and M. Mager and Q. W. Malik and E. Okkinga and T. Y. Park and T. Peitzmann and F. Pliquett and M. Protsenko and F. Reidt and S. van Rijk and K. Røed and T. S. Rogoschinski and D. Röhrich and M. J. Rossewij and G. B. Ruis and E. H. Solheim and I. Tymchuk and K. Ullaland and N. K. Watson and H. Yokoyama},
journal= {arXiv preprint arXiv:2209.02511},
year = {2023}
}
Comments
30 pages, 19 figures, submitted to JINST