Pilsl, B, Bergauer, T, Casanova, R, Handerkas, H, Irmler, C, Kraemer, U, Marco-Hernandez, R, Cos, J Mazorra de, Palomo, FR, Portschy, S et al (show 8 more authors)
(2025)
Enhancing radiation hardness and granularity in HV-CMOS: The RD50-MPW4 sensor
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1080.
170752-.
ISSN 0168-9002, 1872-9576
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Text
2504.15730v1.pdf - Author Accepted Manuscript Available under License Creative Commons Attribution. Download (2MB) | Preview |
Abstract
The latest HV-CMOS pixel sensor developed by the former CERN-RD50-CMOS group, known as the RD50-MPW4, demonstrates competitive radiation tolerance, spatial granularity, and timing resolution — key requirements for future high-energy physics experiments such as the HL-LHC and FCC. Fabricated using a 150 nm CMOS process by LFoundry, it introduces several improvements over its predecessor, the RD50-MPW3, including separated power domains for reduced noise, a new backside biasing scheme, and an enhanced guard ring structure, enabling operation at bias voltages up to 800 V. Tests with non-irradiated samples achieved hit detection efficiencies exceeding 99.9 % and a spatial resolution around 16 μm. Neutron-irradiated sensors were characterized using IV measurements and test-beam campaigns, confirming the sensor's robustness in high-radiation environments. The results highlight the ability of HV-CMOS technology to restore hit detection efficiency post-irradiation by increasing the applied bias voltage. Details of these measurements and timing performance are presented in this paper.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | RD50-MPW, HV-CMOS, DMAPS, CERN-RD50, Radiation damage |
| Divisions: | Faculty of Science & Engineering Faculty of Science & Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 08 Jul 2025 08:51 |
| Last Modified: | 16 Jun 2026 16:57 |
| DOI: | 10.1016/j.nima.2025.170752 |
| Related Websites: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3193600 |
| Disclaimer: | The University of Liverpool is not responsible for content contained on other websites from links within repository metadata. Please contact us if you notice anything that appears incorrect or inappropriate. |
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