Comparative analysis of digital pulse processing methods at high count rates

Kamleitner, J.; Coda, S.; Gnesin, Silvano; Marmillod, P.

doi:10.1016/j.nima.2013.10.023

Cited by 22 publications

(17 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cut-off frequencies used of the RC and CR 2 filters were 5.02 × 10 8 and 4.39 × 10 8 Hz, respectively, which are in the signal processing. The signals passing through the RC-CR 2 filter were converted into a bipolar signal because the high-pass filter was a differentiator that generated an output in proportion to the rate of change of the input signal [29]. We measured the light signals that had proper rise and decay times when they were higher than a threshold level.…”

Section: Methodsmentioning

confidence: 99%

High-Spatial-Resolution Position-Sensitive Plastic Scintillation Optical Fiber Bundle Detector

et al. 2021

View full text Add to dashboard Cite

We fabricated a 5 m long position-sensitive plastic scintillation optical fiber (PSOF) bundle detector composed of a sensing probe, two photomultiplier tubes (PMTs), two fast amplifiers, and a digitizer. Seven PSOFs in a bundle were used as sensing probes to estimate the gamma-ray source position, and 60Co, an uncollimated solid-disc-type radioactive isotope, was used as a gamma-ray emitter. To improve on the spatial resolution of previous studies, the transit time spread (TTS) was reduced by using a high-timing-response PMT and a bundle type of multi-cladded PSOFs. Noise was filtered out of the data. In addition, the accuracy of the data was improved through cubic spline interpolation. We determined the measurement time and measured the full width at half maximum (FWHM) considering the spatial resolution. We obtained the best spatial resolution—compared to the results of earlier studies—using our proposed bundle detector. Moreover, the sensitivity of the PSOF bundle detector was evaluated at several positions in the sensing probe. Based on the results of this study, a position-sensitive PSOF bundle detector could be used to measure gamma-ray source positions accurately over a wide contaminated area and in a shorter period of time.

show abstract

Section: Methodsmentioning

confidence: 99%

High-Spatial-Resolution Position-Sensitive Plastic Scintillation Optical Fiber Bundle Detector

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In the Cross-Correlation (CC) analysis [16,22,23], the normalized cross-correlation of a waveform A and a reference (or template) pulse R is calculated by C=R 0 T A 0 /[||R 0 ||·||A 0 ||], where the centered reference waveform vector R 0 =R-w T Rw/N, w is a vector that has the same dimension N as R and all of its elements are 1; and the centered waveform vector A 0 =A-w T Aw/N.…”

Section: Feature Extractionmentioning

confidence: 99%

“…Template waveform R is useful for quantifying the similarity between an individual waveform A and the template waveform of a class [16,22,23]. We chose the average waveform from the 3 He tube (with A max >24 mV) measured at CG1A beam line as the reference pulse R for neutrons (see Fig.…”

Section: Feature Extractionmentioning

confidence: 99%

Improved neutron-gamma discrimination for a 3He neutron detector using subspace learning methods

Wang

Funk

Riedel

et al. 2017

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

3 He gas based neutron Linear-Position-Sensitive Detectors (LPSDs) have been used for many neutron scattering instruments. Traditional Pulse-height Analysis (PHA) for Neutron-Gamma Discrimination (NGD) resulted in the neutron-gamma efficiency ratio (NGD ratio) on the order of 10 5-10 6. The NGD ratios of 3 He detectors need to be improved for even better scientific results from neutron scattering. Digital Signal Processing (DSP) analyses of waveforms were proposed for obtaining better NGD ratios, based on features extracted from rise-time, pulse amplitude, charge integration, a simplified Wiener filter, and the cross-correlation between individual and template waveforms of neutron and gamma events. Fisher Linear Discriminant Analysis (FLDA) and three Multivariate Analyses (MVAs) of the features were performed. The NGD ratios are improved by about 10 2-10 3 times compared with the traditional PHA method. Our results indicate the NGD capabilities of 3 He tube detectors can be significantly improved with subspace-learning based methods, which may result in a reduced data-collection time and better data quality for further data reduction.

show abstract

“…It is nevertheless essential in practice to develop a reliable and robust method of spectroscopic analysis that can be used routinely. An extensive study of pulse recognition and pulse height analysis techniques was carried out for this purpose [12]. This encompassed a wide variety of techniques, primarily differing in the area of signal treatment (filtering).…”

Section: Pulse Processing and Pulse Recognitionmentioning

confidence: 99%