Measurement of the charge collection in irradiated miniature sensors for the upgrade of the ATLAS phase-II strip tracker

0540295 - FZÚ 2021 RIV NL eng J - Journal Article
Cindro, V. - Abidi, S. H. - Affolder, A.A. - Kroll, Jiří - Latoňová, Věra - Mikeštíková, Marcela … Total 34 authors
Measurement of the charge collection in irradiated miniature sensors for the upgrade of the ATLAS phase-II strip tracker.
Nuclear Instruments & Methods in Physics Research Section A. Roč. 924, April (2019), s. 153-159. ISSN 0168-9002. E-ISSN 1872-9576
R&D Projects: GA MŠMT(CZ) LTT17018; GA MŠMT LM2015058
Institutional support: RVO:68378271
Keywords : silicon * microstrip * signal * ATLAS
OECD category: Particles and field physics
Impact factor: 1.265, year: 2019
Method of publishing: Limited access
https://doi.org/10.1016/j.nima.2018.10.007

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.

Permanent Link: http://hdl.handle.net/11104/0317938