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First bulk and surface results for the ATLAS ITk Strip stereo annulus sensors

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    0540297 - FZÚ 2021 RIV NL eng J - Journal Article
    Hunter, R.F.H. - Abidi, S. H. - Affolder, A.A. - Böhm, Jan - Kotek, Zdeněk - Kroll, Jiří - Latoňová, Věra - Mikeštíková, Marcela - Šťastný, Jan - Zahradník, Vít
    First bulk and surface results for the ATLAS ITk Strip stereo annulus sensors.
    Nuclear Instruments & Methods in Physics Research Section A. Roč. 942, April (2019), s. 142-146. ISSN 0168-9002. E-ISSN 1872-9576
    R&D Projects: GA MŠk(CZ) LTT17018; GA MŠk LM2015058
    Institutional support: RVO:68378271
    Keywords : HL-LHC * ATLAS ITk * n+ -in-p microstrip sensor
    Subject RIV: BF - Elementary Particles and High Energy Physics
    OBOR OECD: Particles and field physics
    Impact factor: 1.265, year: 2019

    A novel microstrip sensor geometry, the stereo annulus, has been developed for use in the end-cap of the ATLAS experiment’s strip tracker upgrade at the HL-LHC. Its first implementation is in the ATLAS12EC sensors, a large-area, radiation-hard, single-sided, AC-coupled, n + -in-p design produced by the ITk Strip Sensor Collaboration and fabricated by Hamamatsu Photonics in early 2017. The results of the initial testing of two ATLAS12EC batches are presented here with a comparison to specification. The potential of the new sensor shape to reinvigorate endcap strip tracking is explained and its effects on sensor performance are isolated by comparing the bulk mechanical and electrical properties of the new sensor to the previous iteration of prototype, the conventional barrel ATLAS12A sensor.
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