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We characterize the performance of two pixelated neutron detectors: aPMT-based array that utilizes Anger logic for pixel identification and aSiPM-based array that employs individual pixel readout. The SiPM-based arrayoffers improved performance over the previously developed PMT-based detectorboth in terms of uniformity and neutron detection efficiency. Each detectorarray uses PSD-capable plastic scintillator as a detection medium. We describethe calibration and neutron efficiency measurement of both detectors using a$^{137}$Cs source for energy calibration and a $^{252}$Cf source forcalibration of the neutron response. We find that the intrinsic neutrondetection efficiency of the SiPM-based array is ($30.2 \ \pm \ 1.7$)\%, whichis almost twice that of the PMT-based array, which we measure to be ($16.9 \pm0.2$)\%.

A comparison of the neutron detection efficiency and response  characteristics of two pixelated PSD-capable organic scintillator detectors  with different photo-detection readout methods