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HK: Fachverband Physik der Hadronen und Kerne
HK 45: Instrumentation IX
HK 45.5: Vortrag
Donnerstag, 19. März 2026, 17:15–17:30, PHIL B 302
Portable standalone n/γ detector based on RedPitaya board — •Dzmitry Kazlou, Roman Bergert, Hans-Georg Zaunick, and Kai-Thomas Brinkmann — 2nd Institute of Experimental Physics, Justus-Liebig-University, Giessen, Germany
A portable neutron/γ detector was developed leveraging the open-source RedPitaya platform (Xilinx Zynq-7010/7020 SoC) as a compact data acquisition system based on a 125 MS/s 14-bit ADC, combining low-cost and easily accessible components. A custom open source SiPM bias board was used to eliminates the need for an external high-voltage supply. Dedicated fast broad-band preamplifiers have been developed for the Hamamatsu S14160-6050 and S14160-3010 silicon photomultipliers, providing a dual-channel readout with an extended dynamic range. The commercially available EJ-276D plastic scintillator was chosen as the detector material due to its well-performing pulse shape discrimination (PSD) capability, enabling efficient separation of fast neutrons from γ-rays.
The detector was calibrated with standard γ-sources (137Cs, 22Na, 207Bi) and characterized in mixed neutron/γ fields from known AmBe, 252Cf, and RaBe sources, after which it was tested in a high-energy neutron field with γ background. The proton beam measurements were performed to obtain the proton light-yield quenching factor, which is necessary for the subsequent unfolding of the neutron spectrum. The resulting portable device is highly suited for radiation monitoring, dosimetry, and applications requiring simultaneous identification of neutrons and γ-quanta.
Keywords: neutron detection; pulse shape discrimination; plastic scintillator; SiPM; RedPitaya