研究目的
To evaluate the fast neutron detection performance of two different silicon photomultipliers (SiPMs) from Zecotek Photonics and Hamamatsu when coupled to Stilbene and p-terphenyl plastic scintillators, using a PuBe neutron source.
研究成果
The study demonstrated good performance of the SiPMs as light readouts in neutron detectors based on Stilbene, with a figure of merit of about 0.8 for both SiPMs. The zero crossing method showed better discrimination capability for the MAPD-3NK compared to the MPPC-S12572-010P. The p-terphenyl based detector can be used as a counter but does not provide information on the type of ionization radiation. These detectors are suitable for compact, power-efficient, and portable devices for various nuclear applications.
研究不足
The p-terphenyl scintillator did not show any neutron/gamma discrimination capability, likely due to the lack of doping with a solvent that could allow discrimination.
1：Experimental Design and Method Selection:
The study involved the use of two types of SiPMs coupled to Stilbene and p-terphenyl plastic scintillators for fast neutron detection. Charge comparison and zero crossing neutron/gamma discrimination techniques were employed.
2：Sample Selection and Data Sources:
Stilbene and p-terphenyl scintillators (5x5x5 mm3) were used, coupled to MAPD-3NK and MPPC-S12572-010P SiPMs. A PuBe neutron source was used for neutron detection.
3：List of Experimental Equipment and Materials:
MAPD-3NK SiPM from Zecotek Photonics, MPPC-S12572-010P SiPM from Hamamatsu, Stilbene and p-terphenyl scintillators, PuBe neutron source, CAEN DT5720B Desktop Waveform Digitizer.
4：Experimental Procedures and Operational Workflow:
The scintillators were wrapped in reflective Teflon tape and coupled to the SiPMs using optical grease. Signals were amplified and recorded using the CAEN DT5720B digitizer. Data analysis was performed offline using C++ and ROOT framework.
5：Data Analysis Methods:
Charge comparison and zero crossing methods were used for neutron/gamma discrimination. Figure of merit (FOM) was calculated for different bias voltages to determine the optimum PSD.
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