Work

Is the gain–voltage dependence of SiPMs linear?

Year: 2025

Type: article

Abstract: The gain–voltage dependence for SiPMs from Ref.(V. Chmill et al., 2017) (V. Chmill et al., Study of the breakdown voltage of SiPMs) is reanalyzed and a non-linearity at the sub-percent level is observed. Simulations show that the non-linearity can be explained by the increase of the depletion depth of the avalanche region with over-voltage. A consequence of the non-linearity is that the voltage at which the discharge stops is systematically underestimated if a linear extrapolation is used. However, the shift is too small to explain the difference between the break-down voltage from the current–voltage dependence and the one obtained from the extrapolation of the gain–voltage dependence to gain one. The results are confirmed by measurement of a different MPPC produced by Hamamatsu which has a break-down voltage which is about a factor two higher.

Source: Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

DOI: 10.1016/j.nima.2025.170444

Authors: M. Antonello, L. Brinkmann, E. Garutti, R. Klanner, J. Schwandt

Institution: Universität Hamburg

Language: English

Topic: Radiation Detection and Scintillator Technologies

Subfield: Radiation

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,620

Funder: Deutsche Forschungsgemeinschaft