Timing performance and gain degradation after irradiation with protons and neutrons of Low Gain Avalanche Diodes based on a shallow and broad multiplication layer in a float-zone 35μm and 50μm thick silicon substrate
The high-luminosity upgrade of the ATLAS and CMS experiments includes dedicated sub-detectors to perform the time-stamping of minimum ionizing particles (MIPs). These detectors will be exposed up to fluences in the range of 1.5–2.5 × 10¹⁵ neq∕cm² and require a time resolution per detecting layer of...
| Autores: | , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Universidad de Cantabria (UC) |
| Repositorio: | UCrea Repositorio Abierto de la Universidad de Cantabria |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unican.es:10902/31941 |
| Acceso en línea: | https://hdl.handle.net/10902/31941 |
| Access Level: | acceso abierto |
| Palabra clave: | Timing detector Gain Jitter Slew rate Shallow junction |
| Sumario: | The high-luminosity upgrade of the ATLAS and CMS experiments includes dedicated sub-detectors to perform the time-stamping of minimum ionizing particles (MIPs). These detectors will be exposed up to fluences in the range of 1.5–2.5 × 10¹⁵ neq∕cm² and require a time resolution per detecting layer of 30 ps, for non-irradiated sensors, to 50–70 ps (depending on the exposed fluences) for sensors at the end of their lifetime. To cope with these requirements, the low-gain avalanche diode (LGAD) has been chosen as the baseline detection technology. In this article, an in-depth radiation tolerance study on LGADs manufactured at IMB-CNM using a so-called shallow junction is presented. Proton irradiation at CERN-PS up to fluences of 3 × 10¹⁵ neq∕cm² and neutron irradiation at JSI-Ljubljana up to 2.5 × 10¹⁵ neq∕cm² were performed. Two different active thicknesses were studied: 35 μm and 50 μm. Gain degradation, operation stability, and timing performance were evaluated. |
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