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Characterisation of strip silicon detectors for the ATLAS Phase-II Upgrade with a micro-focused X-ray beam

DOI: 10.1088/1748-0221/11/07/P07023 DOI Help

Authors: L. Poley (Deutsches Elektronen-Synchrotron) , A. Blue (SUPA School of Physics and Astronomy, University of Glasgow) , R. Bates (SUPA School of Physics and Astronomy, University of Glasgow) , I. Bloch (Deutsches Elektronen-Synchrotron) , S. Díez (Deutsches Elektronen-Synchrotron) , J. Fernandez-tejero (Centro Nacional de Microelectrónica (IMB-CNM)) , C. Fleta (Centro Nacional de Microelectrónica (IMB-CNM)) , B. Gallop (Science and Technology Facilities Council (STFC)) , A. Greenall (Department of Physics, University of Liverpool) , I.-m. Gregor (Deutsches Elektronen-Synchrotron) , K. Hara (Institute of Pure and Applied Sciences, University of Tsukuba) , Y. Ikegami (Institute of Particle and Nuclear Study, KEK) , C. Lacasta (hIFIC, CSIC-U) , K. Lohwasser (Deutsches Elektronen-Synchrotron) , D. Maneuski (University of Glasgow) , S. Nagorski (School of Physics, Dublin Institute of Technology) , I. Pape (Diamond Light Source) , P. W. Phillips (Science and Technology Facilities Council (STFC)) , D. Sperlich (Institut für Physik, Humboldt-Universität zu Berlin) , K. Sawhney (Diamond Light Source) , U. Soldevila (IFIC, CSIC-U) , M. Ullan (Centro Nacional de Microelectrónica (IMB-CNM)) , Y. Unno (Institute of Particle and Nuclear Study, KEK) , M. Warren (Department of Physics and Astronomy, University College London)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Instrumentation , VOL 11 , PAGES P07023 - P07023

State: Published (Approved)
Published: July 2016
Diamond Proposal Number(s): 11639

Open Access Open Access

Abstract: The planned HL-LHC (High Luminosity LHC) in 2025 is being designed to maximise the physics potential through a sizable increase in the luminosity up to 6centerdot1034 cm−2s−1. A consequence of this increased luminosity is the expected radiation damage at 3000 fb−1 after ten years of operation, requiring the tracking detectors to withstand fluences to over 1centerdot1016 1 MeV neq/cm2. In order to cope with the consequent increased readout rates, a complete re-design of the current ATLAS Inner Detector (ID) is being developed as the Inner Tracker (ITk). Two proposed detectors for the ATLAS strip tracker region of the ITk were characterized at the Diamond Light Source with a 3 μm FWHM 15 keV micro focused X-ray beam. The devices under test were a 320 μm thick silicon stereo (Barrel) ATLAS12 strip mini sensor wire bonded to a 130 nm CMOS binary readout chip (ABC130) and a 320 μm thick full size radial (end-cap) strip sensor - utilizing bi-metal readout layers - wire bonded to 250 nm CMOS binary readout chips (ABCN-25). A resolution better than the inter strip pitch of the 74.5 μm strips was achieved for both detectors. The effect of the p-stop diffusion layers between strips was investigated in detail for the wire bond pad regions. Inter strip charge collection measurements indicate that the effective width of the strip on the silicon sensors is determined by p-stop regions between the strips rather than the strip pitch.

Subject Areas: Materials, Physics


Instruments: B16-Test Beamline

Other Facilities: Deutsches Elektronen-Synchrotron

Documents:
Poley-Bates-detectors-JINST-July16.pdf

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