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Author  |
Boudagga, R. et al; Lacasta, C.; Marinas, C.; Mazorra de Cos, J.; Molina-Bueno, L.; Vobbilisetti, V. |
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Title |
Upgrade of the Belle II vertex detector with depleted monolithic CMOS active sensors |
Type |
Journal Article |
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Year |
2025 |
Publication |
Nuclear Instruments & Methods in Physics Research A |
Abbreviated Journal |
Nucl. Instrum. Methods Phys. Res. A |
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Volume |
1080 |
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Pages |
170677 - 4pp |
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Keywords |
Belle II; Vertex detector upgrade; VTX; Particle tracking detectors; CMOS pixel sensor; Depleted monolithic active pixel sensor; Front-end electronics for detector readout In-beam characterization |
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Abstract |
The Belle II experiment at the SuperKEKB collider in Japan, which currently holds the world luminosity record for electron-positron collisions, plans to upgrade its vertex detector (VXD) to operate at a target luminosity of 6 x 1035 cm-2s-1. A new pixelated vertex detector (VTX) is under development, utilizing a monolithic CMOS pixel sensor named OBELIX (Optimized BELle II pIXel). The VTX design incorporates 5-6 layers with a total material budget below 2.5% X0. All layers will employ the OBELIX, adapted from the TJ-Monopix2 sensor initially designed for the ATLAS Inner Tracker (ITk) upgrade. The OBELIX sensor, designed using a 180 nm CMOS process, features an enhanced pixel matrix and additional functionalities compared to its predecessor. Laboratory tests and test beam characterization results on irradiated and unirradiated TJ-Monopix2 sensors have yielded promising results, confirming the key performance parameters for the OBELIX design. This paper reviews the overall design of the VTX and the OBELIX sensor and presents the latest results of the in-beam characterization of the TJ-Monopix2. |
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Address |
[Babeluk, M.; Bergauer, T.; Irmler, C.; Kaliyar, A. B.; Pilsl, B.; Schwanda, C.] Austrian Acad Sci HEPHY, Inst High Energy Phys, Nikolsdorfer Gasse 18, A-1050 Vienna, Austria, Email: boudagga@cppm.in2p3.fr |
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Publisher |
Elsevier |
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Language |
English |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0168-9002 |
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Notes |
WOS:001512619800001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
6714 |
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