Neutron generator burst timing measured using a pulse shape discrimination plastic scintillator with silicon photomultiplier readout

Preston, Rhys; Eberhardt, John E.; Tickner, James

doi:10.1088/1748-0221/8/12/p12005

Cited by 10 publications

(4 citation statements)

References 33 publications

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“…To further pursue this notion, we are developing a low-cost and compact digital pulse processor [46]. The pulse detection, timing, and weighted integration are performed in real-time by a digital signal processor.…”

Section: Discussionmentioning

confidence: 99%

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Neutron-Gamma Pulse Shape Discrimination Using Organic Scintillators With Silicon Photomultiplier Readout

Preston

Eberhardt

Tickner

2014

IEEE Trans. Nucl. Sci.

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Neutron/Gamma pulse shape discrimination (PSD) was measured using stilbene and EJ-299-34 plastic scintillators with readout by silicon photomultipliers (SiPMs). The SiPM pulses were digitized and processed for energy and pulse shape information using a digital technique performing numerical weighted integrations on each pulse. A genetic algorithm (GA) was developed to optimize the weighting vectors used for the pulse shape discrimination. Efficient PSD was obtained down to an electron-equivalent energy of 127 keV with stilbene and 391 keV with the EJ-299-34 PSD plastic. Separation at lower energies was possible at reduced detection efficiency, down to 78 keV and 186 keV at 50% efficiency. The detectors were used to measure separated gamma and neutron spectra from an Americium-Beryllium neutron source and from a Na-22 gamma source. The GA-optimized weighted integration was compared with digital charge comparison (DCC). The GA exhibited slightly improved performance with a 400 MSps digitization rate and showed a significant advantage at sample rates below 100 MSps.

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Section: Discussionmentioning

confidence: 99%

“…The EJ-299-34 scintillator, with FB60035 readout and digital pulse processor has been demonstrated as an on-line monitor for pulsed fast-neutron sources used in industry [46]. Another application being explored is the design of a lightweight and portable detector for mixed-field survey and dosimetry.…”

Section: Discussionmentioning

confidence: 99%

Neutron-Gamma Pulse Shape Discrimination Using Organic Scintillators With Silicon Photomultiplier Readout

Preston

Eberhardt

Tickner

2014

IEEE Trans. Nucl. Sci.

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“…transmission [22] Advantages: It has high penetration ability, and is easy to identify plastic explosives and other dangerous goods like drugs. It can be combined with X/γ radiography systems [11,23,24] for a comprehensive inspection.…”

Section: Fast Neutronmentioning

confidence: 99%

Acquisition and application of energy and time information in large container photon-counting imaging system

ZHANG

WU²,

ZHANG³

et al. 2023

Advanced Optical Manufacturing Technologies and Applications 2022; And 2nd International Forum of Young Scientists on Advanced

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Large container radiation imaging systems have a wide range of applications and play an important role in national defense and security inspection areas. In recent years, the development of detectors with photon counting capability will help to improve the detection performance of inspection systems. With individual pulses as the output, the photon-counting system carries energy and time information of radiating particles. The no-load count rate is high in large container radiation imaging systems and the pulse width is narrow under the standard of more than 90% no-pileup rate. Therefore, high-speed voltage comparators are more suitable for obtaining energy information. The chosen time interval to recognize crosstalk signals is 5 to 10ns, which can be achieved by most of the main control chips in data processing systems. The Steel Penetration model is simulated, and the results show that energy and time information have different optimal application conditions, but both can improve the performance of large container radiation imaging systems.

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“…This means that pulse shape discrimination can be used to discriminate neutron signals from other signal types. Various pulse shape discrimination techniques include rise-time comparison [41], charge comparison algorithm [21], [22], [42], [43], digital filters [44]- [47], pulse gradient analysis [48], [49], frequency gradient analysis [50], [51], wavelet analysis [52]- [56], and artificial neural networks [57]- [60].…”

Section: Introductionmentioning

confidence: 99%

Real-Time Signal Processing for Mitigating SiPM Dark Noise Effects in a Scintillating Neutron Detector

Pritchard

Chabot

Robucci

et al. 2021

IEEE Trans. Nucl. Sci.

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A 6 LiF:ZnS(Ag) based cold neutron detector with wavelength shifting (WLS) fibers and SiPM photodetector was developed at the NIST Center for Neutron Research. For neutron scattering applications at the NCNR, detector false positives severely diminish the quality of very faint neutron scatter patterns. Thermal noise generated by the SiPM significantly increases the likelihood of false positives by the detector/discriminator. This paper describes and evaluates a digital real-time algorithm implemented on a field programmable gate array (FPGA) which quickly differentiates SiPM thermal noise and noise pulse pile-up from neutron signals. The algorithm reduces deadtime spent on examining noise pulses as well as reduces the number of false positives.

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Neutron generator burst timing measured using a pulse shape discrimination plastic scintillator with silicon photomultiplier readout

Cited by 10 publications

References 33 publications

Neutron-Gamma Pulse Shape Discrimination Using Organic Scintillators With Silicon Photomultiplier Readout

Neutron-Gamma Pulse Shape Discrimination Using Organic Scintillators With Silicon Photomultiplier Readout

Acquisition and application of energy and time information in large container photon-counting imaging system

Real-Time Signal Processing for Mitigating SiPM Dark Noise Effects in a Scintillating Neutron Detector

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