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arXiv · 2512.03811

Studying the GRAiNITA concept: first test beam results

Sergey Barsuk·Oleg Bezshyyko·Ianina Boiaryntseva·Andrey Boyarintsev·Dominique Breton·Herve Chanal·Alexander M. Dubovik·Larysa Golinka-Bezshyyko·Carlos Dominguez Goncalves·Yingrui Hou·Giulia Hull·Miktat Imre·Denys Klekots·Jacques Lefrancois·Jihane Maalmi·Magali Magne·Bernard Mathon·Stéphane Monteil·Sebastien Olmo·David Picard·Marie-Helene Schune·Irina Tupitsyna·Mykhailo Yeresko
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Abstract

Data collected over a two-day period in June 2024 at the CERN SPS H9 test beam using a small-scale GRAiNITA prototype have been analyzed to characterize the detector's energy resolution performance. The measurements allow for a first estimate of the constant term associated with detector non-uniformity. Although the evaluation is limited by the small prototype size and the use of pion beams, the results indicate that the non-uniformity-related constant term is significantly below 1%. Furthermore, the test-beam data confirm that the contribution to the energy resolution arising from photo-electron statistics is approximately 1%/sqrt(E). These findings validate the expected calorimetric performance of the GRAiNITA concept and provide important input for the design and optimization of future full-scale detectors.

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Sergey Barsuk, Oleg Bezshyyko, Ianina Boiaryntseva, Andrey Boyarintsev, Dominique Breton, Herve Chanal, Alexander M. Dubovik, Larysa Golinka-Bezshyyko, Carlos Dominguez Goncalves, Yingrui Hou, Giulia Hull, Miktat Imre, Denys Klekots, Jacques Lefrancois, Jihane Maalmi, Magali Magne, Bernard Mathon, Stéphane Monteil, Sebastien Olmo, David Picard, Marie-Helene Schune, Irina Tupitsyna, Mykhailo Yeresko. 2026-03-30. Studying the GRAiNITA concept: first test beam results. https://doi.org/10.1088/1748-0221%2F21%2F03%2Fp03048

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