Detection efficiency and spatial resolution of Monolithic Active Pixel Sensors bent to different radii

Anton Andronic; Pascal Becht; Mihail Bogdan Blidaru; Giuseppe Eugenio Bruno; Francesca Carnesecchi; Emma Chizzali; Domenico Colella; Manuel Colocci; Giacomo Contin; Laura Fabbietti; Roman Gernhäuser; Hartmut Hillemanns; Nicolo Jacazio; Alexander Philipp Kalweit; Alex Kluge; Artem Kotliarov; Filip Křížek; Lukas Lautner; Magnus Mager; Paolo Martinengo; Silvia Masciocchi; Marius Wilm Menzel; Alice Mulliri; Felix Reidt; Riccardo Ricci; Roberto Russo; David Schledewitz; Gilda Scioli; Serhiy Senyukov; Sabyasachi Siddhanta; Jory Sonneveld; Johanna Stachel; Miljenko Šuljić; Nicolas Tiltmann; Arianna Grisel Torres Ramos; Berkin Ulukutlu; Gianluca Usai; Jacob Bastiaan Van Beelen; Yitao Wu; Alperen Yüncü

doi:10.1016/j.nima.2025.171131

Detection efficiency and spatial resolution of Monolithic Active Pixel Sensors bent to different radii

Anton Andronic
, Pascal Becht
, Mihail Bogdan Blidaru
, Giuseppe Eugenio Bruno
, Francesca Carnesecchi
, Emma Chizzali
, Domenico Colella
, Manuel Colocci
, Giacomo Contin
, Laura Fabbietti
, Roman Gernhäuser
, Hartmut Hillemanns
, Nicolo Jacazio
, Alexander Philipp Kalweit
, Alex Kluge
, Artem Kotliarov
, Filip Křížek
, Lukas Lautner
, Magnus Mager
, Paolo Martinengo

Silvia Masciocchi, Marius Wilm Menzel, Alice Mulliri, Felix Reidt, Riccardo Ricci, Roberto Russo, David Schledewitz, Gilda Scioli, Serhiy Senyukov, Sabyasachi Siddhanta, Jory Sonneveld, Johanna Stachel, Miljenko Šuljić, Nicolas Tiltmann, Arianna Grisel Torres Ramos, Berkin Ulukutlu, Gianluca Usai, Jacob Bastiaan Van Beelen, Yitao Wu, Alperen Yüncü

Chair of Experimentalphysik - Dense and Strange Hadronic Matter

University of Münster
Heidelberg University
GSI Helmholtz Center
Politecnico di Bari
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
European Organization for Nuclear Research
Technical University of Munich
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
DIBINEM, Alma Mater Studiorum, University of Bologna
INFN- Sezione di Trieste
University of Trieste Via A
Nuclear Physics Institute of the Cas
Sezione INFN di Cagliari
Sezione INFN di Roma La Sapienza
University of Salerno
Science Park 105
Institut Pluridisciplinaire Hubert Curien
University of Cagliari
University of Science and Technology of China

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Bent monolithic active pixel sensors are the basis for the planned fully cylindrical ultra low material budget tracking detector ITS3 of the ALICE experiment. This paper presents results from testbeam campaigns using high-energy particles to verify the performance of 50 μm thick bent ALPIDE chips in terms of efficiency and spatial resolution. The sensors were bent to radii of 18, 24 and 30 mm, slightly smaller than the foreseen bending radii of the future ALICE ITS3 layers. An efficiency larger than 99.9% and a spatial resolution of approximately 5 μm, in line with the nominal operation of flat ALPIDE sensors, is obtained at nominal operating conditions. These values are found to be independent of the bending radius and thus constitute an additional milestone in the demonstration of the feasibility of the planned ITS3 detector. In addition, a special geometry in which the beam particles graze the chip and traverse it laterally over distances of up to 3 mm is investigated.

Original language	English
Article number	171131
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	1083
DOIs	https://doi.org/10.1016/j.nima.2025.171131
State	Published - Mar 2026

Keywords

Bent sensors
CMOS
Monolithic active pixel sensors
Particle detection
Silicon
Solid state detectors
Test beam

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10.1016/j.nima.2025.171131

Cite this

Andronic, A., Becht, P., Blidaru, M. B., Bruno, G. E., Carnesecchi, F., Chizzali, E., Colella, D., Colocci, M., Contin, G., Fabbietti, L., Gernhäuser, R., Hillemanns, H., Jacazio, N., Kalweit, A. P., Kluge, A., Kotliarov, A., Křížek, F., Lautner, L., Mager, M., ... Yüncü, A. (2026). Detection efficiency and spatial resolution of Monolithic Active Pixel Sensors bent to different radii. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1083, Article 171131. https://doi.org/10.1016/j.nima.2025.171131

@article{71c4027554ca4321b0183b7eb13337df,

title = "Detection efficiency and spatial resolution of Monolithic Active Pixel Sensors bent to different radii",

abstract = "Bent monolithic active pixel sensors are the basis for the planned fully cylindrical ultra low material budget tracking detector ITS3 of the ALICE experiment. This paper presents results from testbeam campaigns using high-energy particles to verify the performance of 50 μm thick bent ALPIDE chips in terms of efficiency and spatial resolution. The sensors were bent to radii of 18, 24 and 30 mm, slightly smaller than the foreseen bending radii of the future ALICE ITS3 layers. An efficiency larger than 99.9\% and a spatial resolution of approximately 5 μm, in line with the nominal operation of flat ALPIDE sensors, is obtained at nominal operating conditions. These values are found to be independent of the bending radius and thus constitute an additional milestone in the demonstration of the feasibility of the planned ITS3 detector. In addition, a special geometry in which the beam particles graze the chip and traverse it laterally over distances of up to 3 mm is investigated.",

keywords = "Bent sensors, CMOS, Monolithic active pixel sensors, Particle detection, Silicon, Solid state detectors, Test beam",

author = "Anton Andronic and Pascal Becht and Blidaru, \{Mihail Bogdan\} and Bruno, \{Giuseppe Eugenio\} and Francesca Carnesecchi and Emma Chizzali and Domenico Colella and Manuel Colocci and Giacomo Contin and Laura Fabbietti and Roman Gernh{\"a}user and Hartmut Hillemanns and Nicolo Jacazio and Kalweit, \{Alexander Philipp\} and Alex Kluge and Artem Kotliarov and Filip K{\v r}{\'i}{\v z}ek and Lukas Lautner and Magnus Mager and Paolo Martinengo and Silvia Masciocchi and Menzel, \{Marius Wilm\} and Alice Mulliri and Felix Reidt and Riccardo Ricci and Roberto Russo and David Schledewitz and Gilda Scioli and Serhiy Senyukov and Sabyasachi Siddhanta and Jory Sonneveld and Johanna Stachel and Miljenko {\v S}ulji{\'c} and Nicolas Tiltmann and Ramos, \{Arianna Grisel Torres\} and Berkin Ulukutlu and Gianluca Usai and Beelen, \{Jacob Bastiaan Van\} and Yitao Wu and Alperen Y{\"u}nc{\"u}",

note = "Publisher Copyright: {\textcopyright} 2025 The Authors",

year = "2026",

month = mar,

doi = "10.1016/j.nima.2025.171131",

language = "English",

volume = "1083",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

issn = "0168-9002",

publisher = "Elsevier B.V.",

}

Andronic, A, Becht, P, Blidaru, MB, Bruno, GE, Carnesecchi, F, Chizzali, E, Colella, D, Colocci, M, Contin, G, Fabbietti, L, Gernhäuser, R, Hillemanns, H, Jacazio, N, Kalweit, AP, Kluge, A, Kotliarov, A, Křížek, F, Lautner, L, Mager, M, Martinengo, P, Masciocchi, S, Menzel, MW, Mulliri, A, Reidt, F, Ricci, R, Russo, R, Schledewitz, D, Scioli, G, Senyukov, S, Siddhanta, S, Sonneveld, J, Stachel, J, Šuljić, M, Tiltmann, N, Ramos, AGT, Ulukutlu, B, Usai, G, Beelen, JBV, Wu, Y & Yüncü, A 2026, 'Detection efficiency and spatial resolution of Monolithic Active Pixel Sensors bent to different radii', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 1083, 171131. https://doi.org/10.1016/j.nima.2025.171131

Detection efficiency and spatial resolution of Monolithic Active Pixel Sensors bent to different radii. / Andronic, Anton; Becht, Pascal; Blidaru, Mihail Bogdan et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 1083, 171131, 03.2026.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Detection efficiency and spatial resolution of Monolithic Active Pixel Sensors bent to different radii

AU - Andronic, Anton

AU - Becht, Pascal

AU - Blidaru, Mihail Bogdan

AU - Bruno, Giuseppe Eugenio

AU - Carnesecchi, Francesca

AU - Chizzali, Emma

AU - Colella, Domenico

AU - Colocci, Manuel

AU - Contin, Giacomo

AU - Fabbietti, Laura

AU - Gernhäuser, Roman

AU - Hillemanns, Hartmut

AU - Jacazio, Nicolo

AU - Kalweit, Alexander Philipp

AU - Kluge, Alex

AU - Kotliarov, Artem

AU - Křížek, Filip

AU - Lautner, Lukas

AU - Mager, Magnus

AU - Martinengo, Paolo

AU - Masciocchi, Silvia

AU - Menzel, Marius Wilm

AU - Mulliri, Alice

AU - Reidt, Felix

AU - Ricci, Riccardo

AU - Russo, Roberto

AU - Schledewitz, David

AU - Scioli, Gilda

AU - Senyukov, Serhiy

AU - Siddhanta, Sabyasachi

AU - Sonneveld, Jory

AU - Stachel, Johanna

AU - Šuljić, Miljenko

AU - Tiltmann, Nicolas

AU - Ramos, Arianna Grisel Torres

AU - Ulukutlu, Berkin

AU - Usai, Gianluca

AU - Beelen, Jacob Bastiaan Van

AU - Wu, Yitao

AU - Yüncü, Alperen

PY - 2026/3

Y1 - 2026/3

N2 - Bent monolithic active pixel sensors are the basis for the planned fully cylindrical ultra low material budget tracking detector ITS3 of the ALICE experiment. This paper presents results from testbeam campaigns using high-energy particles to verify the performance of 50 μm thick bent ALPIDE chips in terms of efficiency and spatial resolution. The sensors were bent to radii of 18, 24 and 30 mm, slightly smaller than the foreseen bending radii of the future ALICE ITS3 layers. An efficiency larger than 99.9% and a spatial resolution of approximately 5 μm, in line with the nominal operation of flat ALPIDE sensors, is obtained at nominal operating conditions. These values are found to be independent of the bending radius and thus constitute an additional milestone in the demonstration of the feasibility of the planned ITS3 detector. In addition, a special geometry in which the beam particles graze the chip and traverse it laterally over distances of up to 3 mm is investigated.

AB - Bent monolithic active pixel sensors are the basis for the planned fully cylindrical ultra low material budget tracking detector ITS3 of the ALICE experiment. This paper presents results from testbeam campaigns using high-energy particles to verify the performance of 50 μm thick bent ALPIDE chips in terms of efficiency and spatial resolution. The sensors were bent to radii of 18, 24 and 30 mm, slightly smaller than the foreseen bending radii of the future ALICE ITS3 layers. An efficiency larger than 99.9% and a spatial resolution of approximately 5 μm, in line with the nominal operation of flat ALPIDE sensors, is obtained at nominal operating conditions. These values are found to be independent of the bending radius and thus constitute an additional milestone in the demonstration of the feasibility of the planned ITS3 detector. In addition, a special geometry in which the beam particles graze the chip and traverse it laterally over distances of up to 3 mm is investigated.

KW - Bent sensors

KW - CMOS

KW - Monolithic active pixel sensors

KW - Particle detection

KW - Silicon

KW - Solid state detectors

KW - Test beam

UR - https://www.scopus.com/pages/publications/105021245489

U2 - 10.1016/j.nima.2025.171131

DO - 10.1016/j.nima.2025.171131

M3 - Article

AN - SCOPUS:105021245489

SN - 0168-9002

VL - 1083

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

M1 - 171131

ER -

Detection efficiency and spatial resolution of Monolithic Active Pixel Sensors bent to different radii

Abstract

Keywords

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