Results from the EPICAL-2 ultra-high granularity electromagnetic calorimeter prototype

A prototype of a new type of calorimeter has been designed and constructed, based on a silicon–tungsten sampling design using pixel sensors with digital readout. It makes use of the ALPIDE sensor developed for the ALICE Inner Tracking System (ITS) upgrade. A binary readout is possible due to the pix...

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Bibliographic Details
Published in:	Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 1045; p. 167539
Main Authors:	Peitzmann, T., Alme, J., Barthel, R., van Bochove, A., Borshchov, V., Bosley, R., van den Brink, A., 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., 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.
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-01-2023 North Holland Publishing Company
Subjects:	Digital calorimeter Digital calorimeter
Online Access:	Get full text
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Summary:	A prototype of a new type of calorimeter has been designed and constructed, based on a silicon–tungsten sampling design using pixel sensors with digital readout. It makes use of the ALPIDE sensor developed for the ALICE Inner Tracking System (ITS) upgrade. A binary readout is possible due to the pixel size of ≈30×30μm2. This prototype has been successfully tested with cosmic muons and with test beams at DESY and the CERN SPS. We report on performance results obtained at DESY, showing good energy resolution and linearity, and compare to detailed MC simulations. Also shown are preliminary results of the high-energy performance as measured at the SPS. The two-shower separation capabilities are discussed. •First fully digital electromagnetic calorimeter with high-speed readout built.•ALPIDE pixel sensors work well in high particle-density environment.•Basic calorimetric performance of pixel calorimeter on par with state of the art.•Has unique capabilities in terms of position resolution and two-shower separation.
ISSN:	0168-9002 1872-9576
DOI:	10.1016/j.nima.2022.167539