Unusual annealing of charge collection efficiency of silicon strip detectors, ATLAS18, irradiated to high fluences with 23 GeV protons
Extensive studies were performed on highly irradiated ATLAS18 mini strip detectors to evaluate their annealing behaviour. Collected charge was measured after several steps of annealing at 60 °C. For detectors irradiated with neutrons or low energy protons the collected charge exhibited a beneficial effect of short-term annealing which was followed by a decrease in charge collection efficiency at longer annealing times. After irradiation with 23 GeV protons to fluences above Φ eq ∼ 1 . 2 ⋅ 1 0 15 cm −2 , the collected charge remained unchanged or decreased after the first few tens of minutes of annealing. Edge-TCT measurements indicated that this unusual annealing behaviour is related to the double-peak electric field profile in the detector. Mixed irradiation with 23 GeV protons and neutrons to fluences matching the expected in the upgraded ATLAS experiment showed this unusual annealing effect will not impact the operation of the ITk strip detector.
Authors
- V. Fadeyev
- B. Crick
- C. Lacasta (ORCID: https://orcid.org/0000-0002-2623-6252)
- C. Solaz (ORCID: https://orcid.org/0000-0002-1170-6311)
- C. Jessiman
- E. J. Staats
- A. S. Chisholm
- T. Koffas
- P. Federičová (ORCID: https://orcid.org/0000-0003-4176-2768)
- Y. Unno (ORCID: https://orcid.org/0000-0002-4170-8537)
- J. Bernabeu (ORCID: https://orcid.org/0000-0002-0296-9988)
- C. Klein (ORCID: https://orcid.org/0000-0002-3780-1755)
- M. Mikeštíková (ORCID: https://orcid.org/0000-0003-1277-2596)
- M. Ullán (ORCID: https://orcid.org/0000-0003-0728-1805)
- R. S. Orr (ORCID: https://orcid.org/0000-0002-8690-9746)
- V. Cindro (ORCID: https://orcid.org/0000-0002-2037-7185)
- R. Jirásek (ORCID: https://orcid.org/0009-0006-0181-7719)
- J. Keller
- J. Kvasnička (ORCID: https://orcid.org/0000-0003-1545-0875)
- Petr Tůma (ORCID: https://orcid.org/0000-0002-7035-2322)
- U. Soldevila (ORCID: https://orcid.org/0000-0002-7674-7878)
- I. Mandić (ORCID: https://orcid.org/0000-0002-0131-7523)
- C. Scharf
- G. Kramberger
- Y. Zhao (ORCID: https://orcid.org/0000-0003-0494-6728)
- J. R. Dandoy (ORCID: https://orcid.org/0000-0002-9271-7126)
- M. Mikuž
- U. Epstein (ORCID: https://orcid.org/0009-0009-7567-7503)
- S. P’yavka (ORCID: https://orcid.org/0009-0004-7468-7244)
- P. Wishart
- M. Puklavec
- J. Kroll (ORCID: https://orcid.org/0000-0001-6215-3326)
Institutions
- High Energy Accelerator Research Organization (JP)
- University of Ljubljana (SI)
- University of California, Santa Cruz (US)
- University of Toronto (CA)
- Czech Academy of Sciences (CZ)
- Jožef Stefan Institute (SI)
- Instituto de Física Corpuscular (ES)
- Institute of Physics of the Slovak Academy of Sciences (SK)
- Institut de Microelectrònica de Barcelona (ES)
Publication Details
- Journal
- Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
- Published
- 2025-06-07
- DOI
- https://doi.org/10.1016/j.nima.2025.170682
- Citations
- 1
- Primary Topic
- Particle Detector Development and Performance
- Type
- article
- Field-Weighted Citation Impact
- 1.87
Funders
- U.S. Department of Energy
- CERN
- Ministerio de Ciencia, Innovación y Universidades
- Canada Foundation for Innovation
- Ministerstvo Školství, Mládeže a Tělovýchovy
- Javna Agencija za Raziskovalno Dejavnost RS
- Natural Sciences and Engineering Research Council of Canada
- European Regional Development Fund
- Agencia Estatal de Investigación