Персона: Савченко, Александр Алексеевич
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Институт нанотехнологий в электронике, спинтронике и фотонике
Институт ИНТЭЛ занимается научной деятельностью и подготовкой специалистов в области исследования физических принципов, проектирования и разработки технологий создания компонентной базы электроники гражданского и специального назначения, а также построения современных приборов на её основе.
Наша основная цель – это создание и развитие научно-образовательного центра мирового уровня в области наноструктурных материалов и устройств электроники, спинтроники, фотоники, а также создание эффективной инновационной среды в области СВЧ-электронной и радиационно-стойкой компонентной базы, источников ТГц излучения, ионно-кластерных технологий материалов.
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- ПубликацияТолько метаданныеGEANT4 FOR INVERSE COMPTON RADIATION SOURCE SIMULATIONS(2021) Savchenko, A. A.; Tishchenko, A. A.; Sergeeva, D. Yu.; Савченко, Александр Алексеевич; Тищенко, Алексей Александрович; Сергеева, Дарья Юрьевна© 27th Russian Particle Accelerator Conference, RuPAC 2021. All rights reserved.In this paper, creation and implementation of the Compton backscattering module into the Geant4 package are under consideration. Created module of Compton backscattering has been implemented as a discrete physical process and operates with a fixed light target (a virtual volume with the properties of a laser beam), with which a beam of charged particles interacts producing x-rays. Such a description allows user to flexibly change necessary parameters depending on the problem being solved, which opens up new possibilities for using Geant4 in the studied area.
- ПубликацияТолько метаданныеSearch for a new material for a medical Cherenkov radiation detector(2024) Savchenko, A. A.; Tishchenko, A. A.; Савченко, Александр Алексеевич; Тищенко, Алексей Александрович
- ПубликацияТолько метаданныеSimulation of channeling radiation and positron production in thick diamond structures and a tungsten single crystal(2019) Azadegan, B.; Wagner, W.; Savchenko, A. A.; Tishchenko, A. A.; Вагнер, Вольфганг Зигфрид; Савченко, Александр Алексеевич; Тищенко, Алексей Александрович© 2019 The process of de-channeling for electrons of energy 2 GeV channeled in the (110) plane of silicon and tungsten single crystals has been studied. The dynamics of the particle distribution density has been investigated in dependence on both the energy and scattering distribution of the initial electron beam. The influence of de-channeling on the spectral intensity of channeling radiation has been investigated by solving the Fokker-Planck equation. A non-conventional positron source is described based on the generation of radiation by relativistic electrons channeled along different crystallographic planes or axes of W, Si, Ge and C (diamond) single crystals and the subsequent conversion of the radiation into e+e−-pairs in an amorphous tungsten target. The simulation of channeling radiation and its dependence on the incidence angle into the crystal has been carried out by means of our Mathematica codes. The conversion of the radiation into e+e−-pairs and the energy distribution of positrons have been simulated using the GEANT4 package.
- ПубликацияТолько метаданныеGeant4 application for efficiency simulation of PbF2 based calorimeters(2023) Savchenko, A. A.; Tishchenko, A. A.; Савченко, Александр Алексеевич; Тищенко, Алексей Александрович
- ПубликацияТолько метаданныеSmall-angle x-ray transition radiation from multilayered structures(2019) Savchenko, A. A.; Sergeeva, D. Yu.; Tishchenko, A. A.; Strikhanov, M. N.; Савченко, Александр Алексеевич; Сергеева, Дарья Юрьевна; Тищенко, Алексей Александрович; Стриханов, Михаил НиколаевичIn this work, we construct for the first time the theory of small-angle transition radiation from multilayered structures. The theoretically obtained spectral and angular distributions of radiated photons are compared with those predicted by GEANT4, a very popular package used today for numerical simulation of different physical processes. We demonstrate that, while spectral distributions ideally coincide, the angular ones differ. We argue that transition radiation from the multilayered structure must contain sharp spikes having the interference nature and caused by the effect of merging two maximum frequencies in dispersive media, and thus GEANT4 needs improving in this respect. The transition radiation theory developed here for the small-angle case can play a vital part for the possible future Small Angle Spectrometer at the LHC, other experiments of this kind, and detectors for hadrons of the tera-electron-volt energy range.
- ПубликацияОткрытый доступDevelopment of Transition Radiation Detectors for hadron identification at TeV energy scale(2019) Cherry, M. L.; Dachs, F.; Fusco, P.; Gargano, F.; Belyaev, N.; Doronin, S. A.; Filippov, K.; Ponomarenko, D.; Pyatiizbyantseva, D.; Romaniouk, A.; Savchenko, A. A.; Sergeeva, D. Y.; Shulga, E.; Smirnov, S.; Smirnov, Y.; Strikhanov, M.; Teterin, P.; Tikhomirov, V.; Tishchenko, A. A.; Vorobev, K.; Доронин, Семен Александрович; Пятиизбянцева, Диана Николаевна; Романюк, Анатолий Самсонович; Савченко, Александр Алексеевич; Сергеева, Дарья Юрьевна; Смирнов, Сергей Юрьевич; Смирнов, Юрий Сергеевич; Стриханов, Михаил Николаевич; Тетерин, Пётр Евгеньевич; Тихомиров, Владимир Олегович; Тищенко, Алексей Александрович; Воробьёв, Константин Александрович© Published under licence by IOP Publishing Ltd.Many modern and future accelerator and cosmic ray experiments require identification of particles with Lorentz γ-factor up to 104 and above. The only technique which reaches this range of Lorentz factors is based on the transition radiation detectors (TRD). This paper describes the development of a TRD based on straw proportional tubes. A prototype of such kind of detector was built and tested at the CERN SPS accelerator. Monte Carlo simulation model of the detector which matches well the experimental data was developed. This program was used for the simulation of a full-scale TRD for hadron identification at TeV energy scale.
- ПубликацияОткрытый доступStudies of the spectral and angular distributions of transition radiation using a silicon pixel sensor on a Timepix3 chip(2020) Alozy, J.; Campbell, M.; Cherry, M.; Dachs, F.; Belyaev, N.; Doronin, S.; Filippov, K.; Krasnopevtsev, D.; Ponomarenko, D.; Romaniouk, A.; Savchenko, A. A.; Sergeeva, D. Y.; Shulga, E.; Smirnov, S.; Smirnov, Y.; Strikhanov, M.; Teterin, P.; Tishchenko, A. A.; Vorobev, K.; Доронин, Семен Александрович; Романюк, Анатолий Самсонович; Савченко, Александр Алексеевич; Сергеева, Дарья Юрьевна; Смирнов, Сергей Юрьевич; Смирнов, Юрий Сергеевич; Стриханов, Михаил Николаевич; Тетерин, Пётр Евгеньевич; Тищенко, Алексей Александрович; Воробьёв, Константин Александрович© 2020 Elsevier B.V.X-ray transition radiation detectors (TRDs) are used for particle identification in both high energy physics and astroparticle physics. In most of the detectors, emission of the X-ray transition radiation (TR) starts at Lorentz factors above γ∼500 and reaches saturation at γ∼2÷3⋅103. However, many experiments require particle identification up to γ∼105, which is very difficult to achieve with conventional detectors. Semiconductor pixel detectors offer a unique opportunity for precise simultaneous measurements of spectral and angular parameters of TR photons. Test beam studies of the energy and the angular distributions of TR photons emitted by electrons and muons of different momenta crossing several types of radiators were performed at the CERN SPS with a 480 μm thick silicon detector bonded to a Timepix3 chip. High resolution images of the energy−angle phase space of the TR produced by different radiators were obtained and compared with MC simulations. The characteristic interference patterns are in agreement with the theoretical models with an unprecedented level of details. The studies presented in this paper also show that simultaneous measurements of both the energy and the emission angles of the TR X-rays could be used to enhance the particle identification performances of TRDs.
- ПубликацияОткрытый доступFine structure of angular distribution of x-ray transition radiation from multilayered radiator in Geant4(2020) Cherry, M.; Dachs, F.; Fusco, P.; Gargano, F.; Savchenko, A. A.; Tishchenko, A. A.; Sergeeva, D. Y.; Belyaev, N.; Doronin, S.; Filippov, K.; Nechaeva, S.; Ponomarenko, D.; Romaniouk, A.; Smirnov, S.; Smirnov, Y.; Strikhanov, M. N.; Teterin, P.; Vorobev, K.; Савченко, Александр Алексеевич; Тищенко, Алексей Александрович; Сергеева, Дарья Юрьевна; Доронин, Семен Александрович; Романюк, Анатолий Самсонович; Смирнов, Сергей Юрьевич; Смирнов, Юрий Сергеевич; Стриханов, Михаил Николаевич; Тетерин, Пётр Евгеньевич; Воробьёв, Константин Александрович© 2020 IOP Publishing Ltd and Sissa Medialab.The present version of the Transition Radiation (TR) simulation module implemented in the Geant4 toolkit describes very well experimental data for the TR energy distribution; however, it does not allow reproducing the details of angular distribution at small angles. In order to solve this problem, corrections to the existing x-ray TR module in Geant4 are proposed. With these corrections, the results of the simulations are in a good agreement with the angular TR distributions predicted by theory and obtained in the test beam measurements using a 480 um Si pixel detector and Mylar radiator.
- ПубликацияОткрытый доступFirst measurements of the spectral and angular distribution of transition radiation using a silicon pixel sensor on a Timepix3 chip(2019) Schioppa, E. J.; Dachs, F.; Alozy, J.; Campbell, M.; Belyaev, N.; Doronin, S.; Filippov, K.; Krasnopevtsev, D.; Ponomarenko, D.; Pyatiizbyantseva, D.; Radomskii, R.; Romaniouk, A.; Shulga, E.; Smirnov, S.; Smirnov, Y.; Sergeeva, D. Y.; Savchenko, A. A.; Strikhanov, M.; Tishchenko, A. A.; Teterin, P.; Vorobev, K.; Доронин, Семен Александрович; Пятиизбянцева, Диана Николаевна; Романюк, Анатолий Самсонович; Смирнов, Сергей Юрьевич; Смирнов, Юрий Сергеевич; Сергеева, Дарья Юрьевна; Савченко, Александр Алексеевич; Стриханов, Михаил Николаевич; Тищенко, Алексей Александрович; Тетерин, Пётр Евгеньевич; Воробьёв, Константин Александрович© 2018 Elsevier B.V. X-ray Transition radiation detectors (TRDs) are used for particle identification in both high energy physics and astroparticle physics. Particle identification is often achieved based on a threshold effect of the X-ray transition radiation (TR). In most of the detectors, TR emission starts at γ factors above ∼500 and reaches saturation at γ∼2−3⋅103. However, many experiments require particle identification up to γ∼105, which is difficult to achieve with current detectors, based only on the measurement of the photon energy together with the particle ionization losses. Additional information on the Lorentz factor can be extracted from the angular distribution of TR photons. TRDs based on pixel detectors give a unique opportunity for precise measurements of spectral and angular distributions of TR at the same time. A 500 μm thick silicon sensor bump bonded to a Timepix3 chip was used in a test beam measurement at the CERN SPS. A beam telescope was employed to separate clusters produced by the primary beam particles from the potential TR clusters. Spectral and angular distributions of TR were studied with high precision for the first time using beams of pions, electrons and muons at different momenta. In this paper, the measurement and analysis techniques are described, and first results are presented.
- ПубликацияОткрытый доступTransition radiation measurements with a Si and a GaAs pixel sensor on a Timepix3 chip(2020) Dachs, F.; Alozy, J.; Bergmann, B. L.; van, Beuzekom, M.; Belyaev, N.; Doronin, S.; Filippov, K.; Ponomarenko, D.; Romaniouk, A.; Savchenko, A.; Sergeeva, D.; Shulga, E.; Smirnov, S.; Smirnov, Y.; Strikhanov, M.; Teterin, P.; Tishchenko, A. A.; Vorobev, K.; Доронин, Семен Александрович; Романюк, Анатолий Самсонович; Савченко, Александр Алексеевич; Сергеева, Дарья Юрьевна; Смирнов, Сергей Юрьевич; Смирнов, Юрий Сергеевич; Стриханов, Михаил Николаевич; Тетерин, Пётр Евгеньевич; Тищенко, Алексей Александрович; Воробьёв, Константин Александрович© 2019 Growing energies of particles at modern or planned particle accelerator experiments as well as cosmic ray experiments require particle identification at gamma-factors (γ) of up to ∼10 5 . At present there are no detectors capable of identifying charged particles with reliable efficiency in this range of γ. New developments in high granular pixel detectors allow one to perform simultaneous measurements of the energies and the emission angles of generated transition radiation (TR) X-rays and use the maximum available information to identify particles. First results of studies of TR energy-angular distributions using gallium arsenide (GaAs) sensors bonded to Timepix3 chips are presented. The results are compared with those obtained using a silicon (Si) sensor of the same thickness of 500 μm. The analysis techniques used for these experiments are discussed.