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Study of electric field in SiPM active volume by the volt-farad characteristics analysis
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SYSNO ASEP 0532528 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Study of electric field in SiPM active volume by the volt-farad characteristics analysis Author(s) Kushpil, Vasilij (UJF-V) ORCID, SAI
Ladygin, V. (RU)
Kushpil, Svetlana (UJF-V) RID, ORCID, SAINumber of authors 3 Article number 07008 Source Title EPJ Web of Conferences, 204. - Les Ulis : EDP Sciences, 2019 - ISSN 2100-014X Number of pages 5 s. Publication form Print - P Action 24th International Baldin Seminar on High Energy Physics Problems - Relativistic Nuclear Physics and Quantum Chromodynamics (Baldin ISHEPP) Event date 17.09.2018 - 22.09.2018 VEvent location Dubna Country RU - Russian Federation Event type WRD Language eng - English Country FR - France Keywords SiPM ; irradiated detectors ; non-irradiated detectors Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders OECD category Nuclear physics R&D Projects LTT18021 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UJF-V - RVO:61389005 UT WOS 000568016300092 DOI 10.1051/epjconf/201920407008 Annotation The purpose of this study is to understand the change of the SiPM structure after irradiation. We compared the profile of the electric field in the SiPM (KETEK) active region for ten not-irradiated and irradiated detectors. The standard method of measurement of C-V characteristics was applied using two configurations (serial and parallel circuit) to exclude the influence of the serial resistance. Dependencies of capacitance on the frequency were studied in the range from 10 to 1000 KHz. For non-irradiated detectors we detected in CV characteristics the local instability basically connected with accumulation of charge on boundary optical isolation-silicon. In addition, the hysteresis of CV characteristics was detected. For irradiated detectors the local instability was visible as well but the hysteresis of CV characteristics was not detected. The results demonstrate that the applied method can be used for the relative analysis of how SiPM active region properties changed after irradiation. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2021
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