Front-End Design for SiPM-Based Monolithic Neutron Double Scatter Imagers.

Area of Science:

• Nuclear instrumentation
• Particle detection technologies

Background:

• Neutron double scatter imaging offers emission imaging of neutron sources.
• Low coincidence detection efficiency in fast neutron imaging limits camera performance.
• Monolithic organic scintillators with multi-faced photosensors can improve detection efficiency.

Purpose of the Study:

• To evaluate silicon photomultipliers (SiPMs) for monolithic neutron scatter cameras.
• To assess noise characteristics and single photon time resolution (SPTR) of SiPMs.
• To demonstrate proof-of-concept for scintillation photon counting and 3D event positioning.

Main Methods:

• Utilized Hamamatsu S13360-6075 SiPMs with low-noise, fast electronic readout.
• Integrated SiPMs into a small-scale monolithic neutron scatter camera prototype.
• Performed measurements of noise performance, SPTR, photon counting, and 3D positioning.

Main Results:

• Evaluated noise characteristics and SPTR of selected SiPMs.
• Demonstrated feasibility of scintillation photon counting with the prototype.
• Showcased potential for 3D event positioning using the monolithic detector design.

Conclusions:

• SiPMs show promise for enhancing neutron double scatter camera efficiency.
• The developed prototype validates the potential of monolithic designs for improved neutron imaging.
• Further research can optimize SiPM integration and noise reduction for practical applications.