Data di Pubblicazione:
2025
Abstract:
The Belle II experiment, operating at the SuperKEKBe+e- collider, is developing a new pixelated vertex detector (VTX) to handle an higher luminosity, up to 6 × 1035cm-2s-1. The VTX will feature 5–6 layers, with a material budget under 3% ofX 0, and will utilize depleted monolithic active pixel sensors. The chip developed for the upgrade of the vertex detector, OBELIX, is based on the TJ-Monopix2 sensor which uses Tower Semiconductor 180 nm CMOS process. OBELIX sensor offers a 33 μm pitch, 50 ns time-stamping, and a digital trigger logic that matches Belle II's 30 kHz trigger rate. The sensor is designed to withstand radiation levels up to 5 × 1014neq/cm2and 1 MGy while maintaining low power dissipation (200 mW/cm2). This paper outlines the motivation for the upgrade and the VTX concept, and presents characterisation results and beam test campaigns on the TJ-Monopix2 sensor, including both non-irradiated and irradiated samples, which are crucial for validating key performance characteristics for the OBELIX design.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
Particle tracking detectors (Solid-state detectors); Radiation-hard detectors; Solid state detectors
Elenco autori:
Auguste, D.; Babeluk, M.; Barbero, M.; Barrillon, P.; Baudot, J.; Bergauer, T.; Bernlochner, F.; Bertolone, G.; Bespin, C.; Bettarini, S.; Bevan, A.; Bona, M.; Bonis, J.; Bosi, F.; Boudagga, R.; Breugnon, P.; Buch, Y.; Casarosa, G.; Corona, L.; Dingfelder, J.; Dorokhov, A.; Dujany, G.; Federici, L.; Fernandez Prieto, A.; Finck, C.; Forti, F.; Fougeron, D.; Frey, A.; Gabrielli, A.; Gaioni, L.; Gallas Torreira, A.; Gao, X.; Giroletti, S.; Gong, J.; Hara, K.; Higuchi, T.; Himmi, A.; Howgill, D.; Hu-Guo, C.; Irmler, C.; Jeans, D.; Kaliyar, A. B.; Karagounis, M.; Kishishita, T.; Kruger, H.; Kumar, A.; Lacasta, C.; Marinas, C.; Massa, M.; Massaccesi, L.; Maushart, M.; Mazorra De Cos, J.; Minuti, M.; Moggi, A.; Molina-Bueno, L.; Mondal, S.; Morel, F.; Nakamura, K. R.; Okazaki, Y.; Onuki, Y.; Pangaud, P.; Peinaud, Y.; Pham, H.; Pilsl, B.; Ratti, L.; Re, V.; Riceputi, E.; Ripp-Baudot, I.; Rizzo, G.; Schall, L.; Schwanda, C.; Schwenker, B.; Schwickardi, M.; Sefri, R.; Serrano, J.; Song, W.; Stavroulakis, P.; Traversi, G.; Valin, I.; Vobbilisetti, V.; Vogt, M.; Wang, S.; Winter, M.; Xu, D.
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