Speaker
Dr
Vladimir LADYGIN
(VBLHEP, JINR)
Description
The detectors based on solid-state photomultipliers (SiPM) are proposed for forthcoming experiments planned with relativistic heavy ions and material studies at FAIR and at NICA. We have investigated SiPM based 10-channel prototype of scintillation detector module produced at JINR by irradiating it with quasi-monoenergetic neutrons of peak energy 32 MeV and fluence ~3*10п∙8 n/cm2. Secondary neutron beam was produced in the 7Li(p,n)7Be neutron generator at the NPI cyclotron (Rez,Czech Republic). It is shown that the module electronics remains operational, but the noise of SiPM increased. We applied new method to monitor changes in the breakdown voltage without measurement of SiPMs I-V characteristics. The method is based on measurement of the dependence of Vpp and Vrms voltage on the bias voltage. The proposed method can be applied for monitoring of changes in the breakdown voltage during the detector operation and does not require the usage of the additional equipment.
Primary author
Dr
Vladimir LADYGIN
(VBLHEP, JINR)
