Investigation of avalanche photo detectors in NPI AVC

Kushpil, V.

doi:10.22323/1.225.0133

Cited by 1 publication

(1 citation statement)

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“…This technique allows estimating the change in the spectrum of the detector noise after the irradiation. Then we started tests of detectors of the same series installed in the 10 channel calorimetric module developed and manufactured at JINR [7]. The calorimetric module was irradiated for three years at the neutron source of the U120 cyclotron at the NPI, Řež, Czech Republic.…”

Section: Introductionmentioning

confidence: 99%

Study of electric field in SiPM active volume by the volt-farad characteristics analysis

Kushpil

Ladygin²,

Kushpil

2019

EPJ Web Conf.

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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.

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Section: Introductionmentioning

confidence: 99%