Performance studies of the CE-65v2 MAPS prototype structure
Abstract With the next upgrade of the ALICE inner tracking system (ITS3) as its primary focus, a set of small MAPS test structures have been developed in the 65 nm TPSCo CMOS process. The CE-65 focuses on the characterisation of the analogue charge collection properties of this technology. The latest iteration, the CE-65v2, was produced in different processes (Standard, with a low-dose n-type blanket, and blanket with gap between pixels), pixel pitches (15, 18, 22.5 µm) and pixel arrangements (square or staggered). The comparatively large pixel array size of 48×24 pixels in CE-65v2 allows the uniformity of the pixel response to be studied, among other benefits. The CE-65v2 chip was characterised in a test beam at the CERN SPS. A first analysis showed that hit efficiencies of ≥ 99% and spatial resolution better than 5 µm can be achieved for all pitches and process variants. For the Standard process, thanks to larger charge sharing, even spatial resolutions below 3 µm are reached, in line with vertex detector requirements for the FCC-ee. This contribution further investigates the data collected at the SPS test beam. Thanks to the large sensor size and efficient data collection, a large amount of statistics was collected, which allows for detailed in-pixel studies to see the efficiency and spatial resolution as a function of the hit position within the pixels. Again, different pitches and process variants are compared.
Authors
- W. Snoeys (ORCID: https://orcid.org/0000-0003-3541-9066)
- Ajit Kumar (ORCID: https://orcid.org/0000-0002-4346-7335)
- A. Kostina
- A. Macchiolo (ORCID: https://orcid.org/0000-0003-0199-6957)
- Jong-Han Park (ORCID: https://orcid.org/0000-0002-2540-2394)
- Ryota Wada (ORCID: https://orcid.org/0000-0003-4748-6610)
- M. Šuljić (ORCID: https://orcid.org/0000-0002-4490-1930)
- J. Baudot (ORCID: https://orcid.org/0000-0001-5585-0991)
- Ziad El Bitar (ORCID: https://orcid.org/0000-0001-6989-2703)
- C. Hu (ORCID: https://orcid.org/0000-0001-9626-4673)
- Hiroko Baba (ORCID: https://orcid.org/0000-0002-0343-6876)
- M. Mager (ORCID: https://orcid.org/0009-0002-2291-691X)
- Kimmo Jaaskelainen (ORCID: https://orcid.org/0000-0002-7172-0449)
- C. Colledani (ORCID: https://orcid.org/0009-0001-2572-2347)
- Alexander Kluge (ORCID: https://orcid.org/0000-0002-6497-3974)
- M. Goffe (ORCID: https://orcid.org/0000-0001-7300-4879)
- T. Chujo (ORCID: https://orcid.org/0000-0001-5433-969X)
- Pavel Staněk (ORCID: https://orcid.org/0000-0002-6922-0461)
- S. Bugiel (ORCID: https://orcid.org/0000-0002-0884-1440)
- T. Katsuno
- E. Ploerer (ORCID: https://orcid.org/0000-0001-9336-4847)
- T. Gunji (ORCID: https://orcid.org/0000-0002-6769-599X)
- Y. Yamaguchi (ORCID: https://orcid.org/0009-0009-3842-7345)
- Auguste Besson (ORCID: https://orcid.org/0000-0001-8822-3548)
- S. Sakai (ORCID: https://orcid.org/0000-0003-1380-0392)
- S. Senyukov (ORCID: https://orcid.org/0000-0003-1907-9786)
- A. Ilg (ORCID: https://orcid.org/0000-0001-9488-8095)
- L. Tomášek (ORCID: https://orcid.org/0000-0002-5224-1936)
- A. Dorokhov (ORCID: https://orcid.org/0000-0001-5809-524X)
- I. Valin
- Daisuke Shibata
- H. Shamas
- A. Lorenzetti
Institutions
- Hiroshima University (JP)
- Centre National de la Recherche Scientifique (FR)
- Vrije Universiteit Brussel (BE)
- University of Tsukuba (JP)
- University of Zurich (CH)
- Institut Pluridisciplinaire Hubert Curien (FR)
- Interuniversity Institute for High Energies (BE)
- Czech Technical University in Prague (CZ)
- European Organization for Nuclear Research (CH)
- Université de Strasbourg (FR)
- The University of Tokyo (JP)
Publication Details
- Journal
- Journal of Instrumentation
- Published
- 2025-03-01
- DOI
- https://doi.org/10.1088/1748-0221/20/03/c03033
- Citations
- 1
- Primary Topic
- Particle Detector Development and Performance
- Type
- article
- Field-Weighted Citation Impact
- 1.87