Fast neutron flux analyzer with real-time digital pulse shape discrimination

Ivanova, Alina; Zubarev, P. V.; Ivanenko, S. V.; Khilchenko, A. D.; Kotelnikov, Aleksandr; Polosatkin, S. V.; Puryga, E. A.; Shvyrev, V. G.; Sulyaev, Yu. S.

doi:10.1016/j.nima.2016.04.088

Cited by 14 publications

(6 citation statements)

References 8 publications

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“…Due to presence of deuterium molecular ions in the plasma emitter the ion source, the beam composed of several fractions of particles with energies equal to full, half, and one-third of accelerating voltage. The ratio of fluxes of different fractions, measured by Doppler Shift Spectroscopy system [14][15][16][17][18], was F E / F E/2 / F E/3 = 0.5/0.3/0.2, that corresponds to the relative current of full energy ions equal to I F =0.7·I. Deuterium gas, puffed to a plasma emitter of the ion source, outflows via ion-optical system to neutralizer cell, and then was captured in the cryopump of the vacuum tank.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, the measurements were done with the pulse duration limited to 0.3 s to avoid occasional overheating and melting of the beam dump surface. Neutron flux was measured by scintillation counter with digital neutron/gamma discrimination [18][19]. The counter consists on the cylindrical stilbene crystal 30 mm in diameter and 30mm long, PMT Hamamatsu R6231-100 and a fast ADC with digital processing unit.…”

Section: -2mentioning

confidence: 99%

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Assessment of neutron production in neutral beam injector of TCV tokamak

Polosatkin¹,

Давыденко²,

Deichuli³

et al. 2016

AIP Conference Proceedings

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Abstract. Neutral beam (NB) injector for the TCV tokamak has been designed to produce a deuterium beam with energy 30 keV, equivalent current up to 50 A, and pulse duration 2 s. The injector operation is accompanied by generation of fast neutrons produced in deuterium-deuterium collisions via a nuclear fusion reaction D(D,n)3He. Main sources of the neutrons are a beam neutralizer and a deuterium-saturated surface of beam dump. Measurements of the neutron yields from the both sources were produced on the prototype of TCV injector in the Budker Institute of Nuclear Physics. Neutron yields from neutralizer and beam dump are equal to 9.5x10 8 s −1 and 2.3x10 9 s −1 for the nominal parameters of the injector (30 kV, 50 A).

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Section: Methodsmentioning

confidence: 99%

Section: -2mentioning

confidence: 99%

Assessment of neutron production in neutral beam injector of TCV tokamak

Polosatkin¹,

Давыденко²,

Deichuli³

et al. 2016

AIP Conference Proceedings

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“…Most of the difference in pulse shape only emerges after the peak. The PSD is commonly achieved by analyzing the difference between two charge-integration gates over different time ranges [19,20,21,22]. There exist several nomenclatures in the literature for naming these two components.…”

Section: Pulse Shape Discriminationmentioning

confidence: 99%

Value-assigned pulse shape discrimination for neutron detectors

Teh,

Lee,

Zhu

et al. 2020

Preprint

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Using the waveforms from a digital electronics system, an offline analysis technique on pulse shape discrimination (PSD) has been developed to improve the n-γ separation in a bar-shaped NE-213 scintillator that couples to a photomultiplier tube (PMT) at each end. The new improved method, called the "valued-assigned PSD" (VPSD), quantifies the separation between neutrons and gamma rays. Position dependence of PSD can be taken into account and automated using VPSD method. The resulting n-γ identification is much improved when compared to the traditional technique that uses the geometric mean (GM) of light outputs from both PMTs.

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“…There is a need to detect and discriminate αand β-radiation using convenient and more effective methods. Pulse shape discrimination (PSD), the charge comparison method (CCM) and the time comparison method (TCM) are commonly used in the discrimination of neutron-and γ-radiation [1][2][3][4][5][6]. I. Kreslo et al reported on PSD with a liquid scintillator [7].…”

Section: Introductionmentioning

confidence: 99%

Detection and discrimination of α- and β-radiation with plastic scintillators based on pulse shape discrimination

Zhang

et al. 2020

J. Inst.

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A: There is a need for more convenient and effective methods for detecting and discriminating between αand β-radiation. In this work, two plastic scintillator detectors were used to detect and discriminate between αand β-radiation based on digital pulse shape discrimination (PSD). The charge comparison method (CCM) performed better than the time comparison method (TCM), and Detector A (with ZnS doping) showed better results than those of Detector B (without ZnS doping). With Detector A, the total rate of misidentification was approximately 0.25% with the appropriate discrimination parameters; with Detector B, the total rate of misidentification was approximately 1.5%. Both detectors showed improved discrimination compared with most commercial detectors. This method is a promising means for improving the effectiveness of the detection and discrimination of αand β-radiation based on PSD.

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Fast neutron flux analyzer with real-time digital pulse shape discrimination

Cited by 14 publications

References 8 publications

Assessment of neutron production in neutral beam injector of TCV tokamak

Assessment of neutron production in neutral beam injector of TCV tokamak

Value-assigned pulse shape discrimination for neutron detectors

Detection and discrimination of α- and β-radiation with plastic scintillators based on pulse shape discrimination

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