Publicação
Sensor response and radiation damage effects for 3D pixels in the ATLAS IBL Detector
| Resumo: | Pixel sensors in 3D technology equip the outer ends of the staves of the Insertable B Layer (IBL), the innermost layer of the ATLAS Pixel Detector, which was installed before the start of LHC Run 2 in 2015. 3D pixel sensors are expected to exhibit more tolerance to radiation damage and are the technology of choice for the innermost layer in the ATLAS tracker upgrade for the HL-LHC programme. While the LHC has delivered an integrated luminosity of \( \simeq 235 \text{ fb}^{-1} \) since the start of Run 2, the 3D sensors have received a non-ionising energy deposition corresponding to a fluence of \( \simeq 8.5 \times 10^{14} \text{ 1 MeV neutron-equivalent cm}^{-2} \) averaged over the sensor area. This paper presents results of measurements of the 3D pixel sensors' response during Run 2 and the first two years of Run 3, with predictions of its evolution until the end of Run 3 in 2025. Data are compared with radiation damage simulations, based on detailed maps of the electric field in the Si substrate, at various fluence levels and bias voltage values. These results illustrate the potential of 3D technology for pixel applications in high-radiation environments. |
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| Autores principais: | Castro, Nuno Filipe |
| Outros Autores: | Onofre, A.; ATLAS Collaboration |
| Assunto: | charge transport Detector modelling and simulations II (electric fields electron emission etc); Particle tracking detectors (Solid-state detectors) multiplication and induction pulse formation |
| Ano: | 2024 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | Pixel sensors in 3D technology equip the outer ends of the staves of the Insertable B Layer (IBL), the innermost layer of the ATLAS Pixel Detector, which was installed before the start of LHC Run 2 in 2015. 3D pixel sensors are expected to exhibit more tolerance to radiation damage and are the technology of choice for the innermost layer in the ATLAS tracker upgrade for the HL-LHC programme. While the LHC has delivered an integrated luminosity of \( \simeq 235 \text{ fb}^{-1} \) since the start of Run 2, the 3D sensors have received a non-ionising energy deposition corresponding to a fluence of \( \simeq 8.5 \times 10^{14} \text{ 1 MeV neutron-equivalent cm}^{-2} \) averaged over the sensor area. This paper presents results of measurements of the 3D pixel sensors' response during Run 2 and the first two years of Run 3, with predictions of its evolution until the end of Run 3 in 2025. Data are compared with radiation damage simulations, based on detailed maps of the electric field in the Si substrate, at various fluence levels and bias voltage values. These results illustrate the potential of 3D technology for pixel applications in high-radiation environments. |
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