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Título: | Measurement of the charge collection in irradiated miniature sensors for the upgrade of the ATLAS phase-II strip tracker |
Autor: | Escobar, Carlos CSIC ORCID; García García, Carmen CSIC ORCID; Lacasta Llácer, Carlos CSIC ORCID; Madaffari, Daniel; Soldevila, Urmila CSIC ORCID; Marcedes Miñano; Daniel Rodriguez; Solaz, Carles | Fecha de publicación: | 21-abr-2019 | Editor: | Elsevier | Citación: | Nuclear Instruments and Methods in Physics Research - Section A 24 (2019) 153-159 | Resumen: | Miniature sensors with external dimensions of 10 mm x 10 mm were produced together with full-size sensors for the innermost ring (R0) of the end-cap part in the upgraded ATLAS inner tracker (ITk). AC- and DC-coupled n-type strips with three different pitches (wide, default and narrow) were processed on high-resistivity p-type FZ silicon substrates by Hamamatsu Photonics. The miniature sensors were irradiated with 70-MeV protons at CYRIC, Tohoku University (Japan) and reactor neutrons at the Jožef Stefan Institute (Slovenia) to three different 1-MeV neutron equivalent fluences: 0.5, 1 and 2 x 10 15 neq cm −2 . The upper fluence range exceeds the highest anticipated in the innermost part of the ATLAS ITk-Strips over the HL-LHC lifetime ( ∼ 1.25 × 10 15 n eq cm 2 ). The charge collection in the test sensors was evaluated systematically using a 90 Sr β -source and an Alibava analogue readout system at reverse-bias voltages up to 1000 V. | Versión del editor: | https://www.sciencedirect.com/science/article/pii/S0168900218313214?via%3Dihub | URI: | http://hdl.handle.net/10261/309088 | DOI: | 10.1016/j.nima.2018.10.007 |
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