Leader: Sabuhi Nuruyev

Work phone number: +7 (496) 216-36-83

Work E-mail:  This email address is being protected from spambots. You need JavaScript enabled to view it. 

Scientific problem:

Silicon photomultipliers (SiPMs) are advanced solid-state photodetectors increasingly used in nuclear physics, medical imaging and particle detection. They offer numerous advantages over traditional photomultiplier tubes (PMTs), including compactness, insensitivity to magnetic fields, low operating voltage and high gain. However, their behavior is dependent on various factors, such as temperature, bias voltage and inherent electronic noise. A clear understanding of these properties is essential for integrating SiPMs into charged particle detection systems. Key parameters that define SiPM operation include gain, breakdown voltage, dark count rate, photon detection efficiency (PDE), crosstalk and temporal resolution. Each of these parameters should be carefully measured and characterized under different operating conditions to ensure reliable and efficient operation in real-world applications. This research focuses on the detailed investigation and calibration of SiPMs, aiming to understand their operational limits and behavior under varied conditions. These insights are fundamental for the further development of SiPM-based detector systems.

Objective: 

To investigate and characterize the key performance parameters of silicon photomultipliers (SiPMs), including gain, breakdown voltage, PDE, and dark count rate, under varying environmental and operating conditions.

Tasks:

1. Investigation of the principles of operation and structure of SiPMs.
2. Investigation and document key SiPM parameters: gain, breakdown voltage, PDE, noise.
3. Assembling test circuits for parameter measurement.
4. Measurement of the temperature dependence of SiPM performance.
5. Estimation of noise characteristics and signal-to-noise ratio.
6. Comparison of specifications from different SiPM manufacturers.
7. Preparation and submission of results for publication and reports.

Research facilities: 

The paper will be completed under the project “Investigations of neutron nuclear interactions and properties of the neutron”. Experiments with radiation sources will be carried out at the beamline 2 of the IREN facility and at the beamline 1 of the IBR-2 reactor.