Topological charge-sharing background reduction for the Silicon Drift Detectors used by the VIP experiment at LNGS

Marco Miliucci; Kristian Piscicchia; Massimiliano Bazzi; Mario Bragadireanu; Michael Cargnelli; Alberto Clozza; Luca De Paolis; Raffaele Del Grande; Carlo Guaraldo; Mihail Iliescu; Matthias Laubenstein; Johann Marton; Edoardo Milotti; Fabrizio Napolitano; Alessio Porcelli; Alessandro Scordo; Francesco Sgaramella; Diana Laura Sirghi; Florin Sirghi; Oton Vazquez Doce; Johann Zmeskal; Catalina Curceanu

doi:10.1016/j.apradiso.2023.110822

Topological charge-sharing background reduction for the Silicon Drift Detectors used by the VIP experiment at LNGS

Appl Radiat Isot. 2023 Jul:197:110822. doi: 10.1016/j.apradiso.2023.110822. Epub 2023 Apr 20.

Authors

Marco Miliucci¹, Kristian Piscicchia², Massimiliano Bazzi¹, Mario Bragadireanu³, Michael Cargnelli⁴, Alberto Clozza¹, Luca De Paolis¹, Raffaele Del Grande⁵, Carlo Guaraldo¹, Mihail Iliescu¹, Matthias Laubenstein⁶, Johann Marton⁴, Edoardo Milotti⁷, Fabrizio Napolitano¹, Alessio Porcelli⁸, Alessandro Scordo¹, Francesco Sgaramella¹, Diana Laura Sirghi⁹, Florin Sirghi³, Oton Vazquez Doce¹, Johann Zmeskal⁴, Catalina Curceanu³

Affiliations

¹ Laboratori Nazionali di Frascati, INFN, Frascati (Rome), Italy.
² Laboratori Nazionali di Frascati, INFN, Frascati (Rome), Italy; Centro Ricerche Enrico Fermi - Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi", Rome, Italy. Electronic address: kristian.piscicchia@cref.it.
³ Laboratori Nazionali di Frascati, INFN, Frascati (Rome), Italy; IFIN-HH, Institutul National pentru Fizica si Inginerie Nucleara Horia Hulubei, Măgurele, Romania.
⁴ Laboratori Nazionali di Frascati, INFN, Frascati (Rome), Italy; Stefan-Meyer-Institute for subatomic physics, Austrian Academy of Science, Vienna, Austria.
⁵ Laboratori Nazionali di Frascati, INFN, Frascati (Rome), Italy; Physik Department E62, Technische Universität München, Garching, Germany.
⁶ Laboratori Nazionali del Gran Sasso, INFN, Assergi (L'Aquila), Italy.
⁷ Dipartimento di Fisica, Università di Trieste and INFN-Sezione di Trieste, Trieste, Italy.
⁸ Laboratori Nazionali di Frascati, INFN, Frascati (Rome), Italy; Centro Ricerche Enrico Fermi - Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi", Rome, Italy.
⁹ Laboratori Nazionali di Frascati, INFN, Frascati (Rome), Italy; Centro Ricerche Enrico Fermi - Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi", Rome, Italy; IFIN-HH, Institutul National pentru Fizica si Inginerie Nucleara Horia Hulubei, Măgurele, Romania.

PMID: 37141750
DOI: 10.1016/j.apradiso.2023.110822

Abstract

Large area Silicon Drift Detectors are employed in high sensitivity tests of the Pauli Exclusion Principle by the VIP-2 Collaboration. The experiment is operated in the extremely low cosmic background environment of the Gran Sasso underground National Laboratory of INFN. In this work an off-line analysis method is proposed which provides an additional background reduction, as well as a better calibration procedure. The study concerns in particular the charge sharing between nearby cells, and is applied to the data set collected during the 2018 VIP-2 campaign. The cross-talk effect inside the detectors array is described and an effective topological method to reject the background induced by charge sharing is outlined.

Keywords: Crosstalk; Silicon Drift Detector; Underground experiment; VIP-2; X-ray spectroscopy.