Персона: Кирсанов, Михаил Алексеевич
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Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
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Кирсанов
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Михаил Алексеевич
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- ПубликацияТолько метаданныеNumerical Simulation of Radiation Anisotropy of the Pyroelectric Neutron Generator(2019) Gromov, M. B.; Kubankin, A. S.; Ionidi, V. Y.; Kaplii, A. A.; Kirsanov, M. A.; Кирсанов, Михаил АлексеевичThe pyroelectric neutron generator is a compact source of fast neutrons with an energy of 2.45 MeV and a yield up to approximate to 10(4) neutrons/s. The device is designed for calibration of low-background neutrino and dark matter detectors and may also serve as an alternative to traditional radioactive sources of fast neutrons in physical research and practical work. Numerical simulation of the angular distribution of neutrons emitted by the pyroelectric generator with the D(d, n)He-3 reaction proceeding within it was performed in order to calculate the neutron yield in the full solid angle and in a given direction correctly. The angular distribution was found to be anisotropic: the neutron yield increased in the direction of motion of incident deuterium ions. This anisotropy was as large as approximate to 25% at a maximum energy of 28 keV of incident particles. The anisotropy increased nonlinearly with the ion energy: it reached approximate to 70% at 50 keV and a monoenergetic flux, but was virtually zero below 10 keV. The obtained angular distribution is similar to that of neutrons in the case of a 15-keV monoenergetic flux of deuterium ions.
- ПубликацияОткрытый доступInvestigation of the interaction of ion beams and X-ray quanta with deuterated crystal structures at the HELIS facility(2019) Dalkarov, O. D.; Negodaev, M. A.; Rusetskii, A. S.; Chepurnov, A. S.; Kirsanov, M. A.; Selivanova, D. A.; Кирсанов, Михаил Алексеевич© Published under licence by IOP Publishing Ltd.The results of studies of the interaction of ion beams and X-ray quanta with deuterated crystal structures at the HELIS facility (LPI) are presented. Results on research of DD-reactions in deuterated crystal structures at deuteron energies 10-25 keV show significant enhancement effect. It is shown that the effect of the beams of ions Ne+ and H+ at energies in the range of 10-25 keV and a beam of X-radiation of 20-30 keV for deuterated target leads to stimulation of DD-reaction. For the target of CVD-diamond it is showed that the orientation of the sample with respect to the deuteron beam affects the neutron yield. Targets (deuterated CVD diamond, palladium, zirconium and titanium) were irradiated with both ion beams and X-ray quanta using an X-ray tube with an energy of up to 30 keV. Analysis of X-ray fluorescence spectra from deuterated targets of CVD diamond and palladium revealed "additional" peaks that are not identified by any of the characteristic radiation lines. Their appearance cannot be connected with any known element, as well as with diffraction processes.
- ПубликацияОткрытый доступModernization of the pulse shape discrimination method for neutron and gamma quanta in scintillation detector(2019) Chepurnov, A. S.; Kubankin, A. S.; Ivanenko, M. I.; Kirsanov, M. A.; Klimanov, S. G.; Кирсанов, Михаил Алексеевич; Климанов, Сергей Геннадиевич© Published under licence by IOP Publishing Ltd.In this paper, we investigated the efficiency of several known and new methods of digital pulse shape discrimination for neutrons and gamma quanta. Experimental data were obtained on a setup consists of a Pu-Be neutron source, organic p-terphenyl scintillation detector and 14 bits, 500 MHz sampling rate flash-ADC with capability to store and upload to the host computer long waveforms for further analysis. A comparison is made in between the results of using traditional and new methods for calculating the signal separation efficiency of Figure of Merit (FOM). The best known from the literature value of the efficiency of neutron and gamma quanta discrimination for the Pu-Be source is FOM = 1.5. We obtained the separation efficiency FOM = 1.77 in the scintillation detector with the p-terphenyl crystal, by a new method. Note also that for the known liquid scintillator BC-501A FOM≈1. A new method of scintillation detector pulse shape discrimination from neutrons and gamma quanta is used to detect the neutron yield from compact neutron generator that is created on the basis of carbon nanotubes.
- ПубликацияОткрытый доступCompact neutron generators for the calibration of low background experiments(2019) Chepurnov, A. S.; Gromov, M. B.; Ionidi, V. Y.; Kaplii, A. A.; Kirsanov, M. A.; Maslenkina, A. Y.; Selivanova, D. A.; Кирсанов, Михаил Алексеевич© Published under licence by IOP Publishing Ltd.In the coming years, the compact monoenergetic neutron generators (CNG) producing up to 104 n/s may become an alternative to the standard neutron sources based on radioactive isotopes for the calibrations of neutrino and dark matter detectors. Such neutron generators have a typical size of about several centimetres, they may be manufactured using low-background materials and may require only low voltage power supply for operation. We discuss the advantages and disadvantages of two main types of the compact neutron generators, namely a pyroelectric neutron source and a high voltage neutron generator. Also the results of the technical analysis of the possibilities to apply such sources for the calibration of low-background experiments are given, the variant of the internal device design is shown and the full-size compact neutron generator prototype are presented.