https://doi.org/10.1140/epjc/s10052-025-14341-4
Regular Article - Experimental Physics
Novel silicon and GaAs sensors for compact sampling calorimeters
1
School of Physics and Astronomy, Tel Aviv University, 69978, Tel Aviv-Yafo, Israel
2
IFIC, CSIC and Universitat de València, C/ Catedràtic José Beltrán Martínez 2, 46980, Paterna, Spain
3
Faculty of Physics and Applied Computer Science, AGH University of Krakow, 30-059, Kraków, Poland
4
Institute of Space Science, 077125, Bucharest, Romania
5
Faculty of Physics, University of Warsaw, Pasteura 5, 02-093, Warsaw, Poland
6
Department of Physics, Nuclear Research Centre-Negev, P.O. Box 9001, 84190, Beer Sheva, Israel
7
Deutsches Elektronen Synchrotron (DESY), Platanenallee 6, 15738, Zeuthen, Germany
8
Institute of Physics, Brandenburg University of Technology, Platz der Deutschen Einheit 1, 03046, Cottbus, Germany
Received:
19
January
2025
Accepted:
7
May
2025
Published online:
22
June
2025
Two samples of silicon pad sensors and two samples of GaAs sensors are studied in an electron beam with 5 GeV energy from the DESY-II test-beam facility. The sizes of the silicon and GaAs sensors are about 9 
9 
and 5 8 , respectively. The thickness is 500 µm for both the silicon and GaAs sensors. The pad size is about 5 5 
. The sensors are foreseen to be used in a compact electromagnetic sampling calorimeter. The readout of the pads is done via traces connected to the pads and the front-end ASICs at the edges of the sensors. For the silicon sensors, copper traces on a Kapton foil are connected to the sensor pads with conducting glue. The pads of the GaAs sensors are connected to bond-pads via aluminium traces on the sensor substrate. The readout is based on a dedicated front-end ASIC, called FLAME. Pre-processing of the raw data and deconvolution is performed with FPGAs. The whole system is orchestrated by a Trigger Logic Unit. Results are shown for the signal-to-noise ratio, the homogeneity of the response, edge effects on pads, cross talk and wrongly assigned signals due to the readout traces.
© The Author(s) 2025
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Funded by SCOAP3.
