1. Pulse pile-up identification and reconstruction for liquid scintillator based neutron detectors
- Author
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Johan Nyberg, X.L. Luo, Enrique Sanchis, G. de Angelis, A. Triossi, M. Moszynski, R. Wadsworth, G. Jaworski, Q. Nishada, A. Gadea, T. Hüyük, P.-A. Söderström, M. Palacz, A. Di Nitto, V. Modamio, J. J. Valiente-Dobón, S. Erturk, F.J. Egea, J. Agramunt, A. Goasduff, M. N. Erduran, Vicente González, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Luo, X. L., Modamio, V., Nyberg, J., Valiente-Dobon, J. J., Nishada, Q., de Angelis, G., Agramunt, J., Egea, F. J., Erduran, M. N., Erturk, S., de France, G., Gadea, A., Gonzalez, V., Goasduff, A., Huyuk, T., Jaworski, G., Moszynski, M., Di Nitto, A., Palacz, M., Soderstrom, P. -A., Sanchis, E., Triossi, A., and Wadsworth, R. more...
- Subjects
Nuclear and High Energy Physics ,Liquid scintillator ,First-order derivative ,Neutron-γ discrimination ,020209 energy ,02 engineering and technology ,Derivative ,Scintillator ,Digital ,7. Clean energy ,01 natural sciences ,Signal ,Spectral line ,Neutron-[formula omitted] discrimination ,Optics ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Neutron detection ,Neutron ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Instrumentation ,Pile-up ,Physics ,Neutron-gamma discrimination ,010308 nuclear & particles physics ,business.industry ,Pulse (physics) ,Neutron- γ discrimination ,business ,Energy (signal processing) - Abstract
WOS: 000433206800010 The issue of pulse pile-up is frequently encountered in nuclear experiments involving high counting rates, which will distort the pulse shapes and the energy spectra. A digital method of off-line processing of pile-up pulses is presented. The pile-up pulses were firstly identified by detecting the downward-going zero-crossings in the first-order derivative of the original signal, and then the constituent pulses were reconstructed based on comparing the pile-up pulse with four models that are generated by combining pairs of neutron and.. standard pulses together with a controllable time interval. The accuracy of this method in resolving the pile-up events was investigated as a function of the time interval between two pulses constituting a pile-up event. The obtained results show that the method is capable of disentangling two pulses with a time interval among them down to 20 ns, as well as classifying them as neutrons or gamma rays. Furthermore, the error of reconstructing pile-up pulses could be kept below 6% when successive peaks were separated by more than 50 ns. By applying the method in a high counting rate of pile-up events measurement of the NEutron Detector Array (NEDA), it was empirically found that this method can reconstruct the pile-up pulses and perform neutron-gamma discrimination quite accurately. It can also significantly correct the distorted pulse height spectrum due to pile-up events. Swedish Research Council; UK STFC [ST/L005727/1]; Generalitat Valenciana, Spain [PROMETEO/2010/101]; MINECO, Spain [AIC-D-2011-0746, FPA2011-29854, FPA2012-33650]; TUBITAK, Turkey [114F473] This work was partly funded by the Swedish Research Council, by the UK STFC, under grant ST/L005727/1, by the Generalitat Valenciana, Spain, under grant PROMETEO/2010/101, by MINECO, Spain, under grants AIC-D-2011-0746, FPA2011-29854 and FPA2012-33650, and by TUBITAK, Turkey, under grant 114F473. more...
- Published
- 2018
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