Establishing the Quality Assurance programme for the strip sensor production of the ATLAS tracker upgrade including irradiation with neutrons, photons and protons to HL-LHC fluences

I. Kopsalis*, P. Allport, E. Bach, A. Bhardwaj, A. Chisholm, V. Cindro, V. Fadeyev, P. Federicova, J. Fernandez-Tejero, C. Fleta, P. Freeman, W. George, J. Glover, L. Gonella, K. Hara, S. Hirose, A. Hunter, T. Ishii, T. Knight, J. KrollJ. Kvasnicka, C. Lacasta, V. Latonova, J. Lomas, I. Mandić, M. Mikestikova, K. Nakamura, R.S. Orr, S. Pyatt, K. Sato, C. Solaz, U. Soldevila, J. Thomas, M. Ullan, Y. Unno

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

The successful pre-production delivery of strip sensors for the new Inner Tracker (ITk) for the upgraded ATLAS detector at the High Luminosity LHC (HL-LHC) at CERN was completed and based on their performance full production has commenced. The overall delivery period is anticipated to last 4 years to complete the approximately 22000 sensors required for the ITk. For Quality Assurance (QA), a number of test structures designed by the collaboration, along with a large area diode and miniature version of the main sensor, are produced in every wafer by the foundry Hamamatsu Photonics K.K (HPK). As well as Quality Control (QC) checks on every main sensor, samples of the QA pieces from each delivery batch are tested both before and after irradiation with results after exposure to neutrons, gammas or protons to fluences and doses corresponding to those anticipated after operation at the HL-LHC to roughly 1.5 times the ultimate integrated luminosity of 4000 fb-1. In this paper the procedures are presented and the studies carried out to establish that the seven ITk QA Strip Sensor irradiation and test sites meet all the requirements to support this very extensive programme throughout the strip sensor production phase for the ITk project.
Original languageEnglish
Article numberC05009
JournalJournal of Instrumentation
Volume18
Issue number05
DOIs
Publication statusPublished - 12 May 2023

Keywords

  • paper
  • Large detector systems for particle and astroparticle physics
  • Particle tracking detectors
  • Particle tracking detectors (Solid-state detectors)

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