Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.04.55031.292-22
Д. В. Диваков, К. П. Ловецкий, А. Л. Севастьянов, А. А. Тютюнник
The numerical solution of the problem of guided propagation of polarized light in a smooth junction of a planar waveguide is considered. Within the framework of the model of adiabatic guided modes, the system of Maxwell equations is reduced to a system of four ordinary differential equations and two algebraic equations for six components of the electromagnetic field in the zeroth approximation and the same number of equations in the first approximation. The multilayer structure of waveguides makes it possible to reduce the problem to a homogeneous system of linear algebraic equations, whose nontrivial solvability condition yields the dispersion equation. Auxiliary eigenvalue problems for describing the adiabatic modes of the waveguide are solved.
{"title":"Адиабатические волноводные моды трехслойного интегрально оптического волновода","authors":"Д. В. Диваков, К. П. Ловецкий, А. Л. Севастьянов, А. А. Тютюнник","doi":"10.21883/jtf.2023.04.55031.292-22","DOIUrl":"https://doi.org/10.21883/jtf.2023.04.55031.292-22","url":null,"abstract":"The numerical solution of the problem of guided propagation of polarized light in a smooth junction of a planar waveguide is considered. Within the framework of the model of adiabatic guided modes, the system of Maxwell equations is reduced to a system of four ordinary differential equations and two algebraic equations for six components of the electromagnetic field in the zeroth approximation and the same number of equations in the first approximation. The multilayer structure of waveguides makes it possible to reduce the problem to a homogeneous system of linear algebraic equations, whose nontrivial solvability condition yields the dispersion equation. Auxiliary eigenvalue problems for describing the adiabatic modes of the waveguide are solved.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90679518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/tp.2023.05.56073.258-22
None Ignatjev V.K.
In the Markov relaxation and locally quasi-equilibrium distribution approximation, analogues of Onzager's relations for the response functions of the spin current in the nonlinear by intense mechanical and thermodynamic effects regime were obtained by the Kubo method. Keywords: locally quasi-equilibrium distribution, spin Hamiltonian, spin current, nonlinearity, reciprocity, streintronics, spin caloritronics, Peltier spin effect, Zeebeck spin effect.
{"title":"Reciprocity relations for mechanically induced spin currents in metals in a nonlinear regime","authors":"None Ignatjev V.K.","doi":"10.21883/tp.2023.05.56073.258-22","DOIUrl":"https://doi.org/10.21883/tp.2023.05.56073.258-22","url":null,"abstract":"In the Markov relaxation and locally quasi-equilibrium distribution approximation, analogues of Onzager's relations for the response functions of the spin current in the nonlinear by intense mechanical and thermodynamic effects regime were obtained by the Kubo method. Keywords: locally quasi-equilibrium distribution, spin Hamiltonian, spin current, nonlinearity, reciprocity, streintronics, spin caloritronics, Peltier spin effect, Zeebeck spin effect.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135988771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/tp.2023.05.56074.12-23
None Babenko P. Yu., None Mikhailov V. S., None Shergin A. P., None Zinoviev A. N.
The results of modeling the sputtering coefficients of polycrystalline beryllium by hydrogen isotopes in the range of collision energies of 8 eV-100 keV and their dependences on the angle of incidence of the beam on the surface are presented. This data is necessary for estimating the sputtering of the first wall in the ITER tokamak made from beryllium. A strong surface shape influence on obtained results is shown. The limiting cases of a flat potential barrier (smooth surface) and a spherical potential barrier (a surface consisting of spikes) are considered. The effect of collision cascades on the sputtering coefficient has been established. The dependences of the average depth of sputtered particle formation on the bombarding particles energy are obtained for various angles of beam incidence on the target. The energy spectra and angular dependences of the ejection of sputtered particles are calculated for different energies of bombarding beam atoms. It is shown that the presence of an attractive well in the potential of an incident particle surface changes the sputtering coefficient dependence on incidence angle at small glancing angles. Keywords: Sputtering coefficients, energy and angular distributions of sputtered particles, interatomic potential, hydrogen isotopes, beryllium.
{"title":"Simulation of polycrystalline beryllium sputtering by H, D, T atoms","authors":"None Babenko P. Yu., None Mikhailov V. S., None Shergin A. P., None Zinoviev A. N.","doi":"10.21883/tp.2023.05.56074.12-23","DOIUrl":"https://doi.org/10.21883/tp.2023.05.56074.12-23","url":null,"abstract":"The results of modeling the sputtering coefficients of polycrystalline beryllium by hydrogen isotopes in the range of collision energies of 8 eV-100 keV and their dependences on the angle of incidence of the beam on the surface are presented. This data is necessary for estimating the sputtering of the first wall in the ITER tokamak made from beryllium. A strong surface shape influence on obtained results is shown. The limiting cases of a flat potential barrier (smooth surface) and a spherical potential barrier (a surface consisting of spikes) are considered. The effect of collision cascades on the sputtering coefficient has been established. The dependences of the average depth of sputtered particle formation on the bombarding particles energy are obtained for various angles of beam incidence on the target. The energy spectra and angular dependences of the ejection of sputtered particles are calculated for different energies of bombarding beam atoms. It is shown that the presence of an attractive well in the potential of an incident particle surface changes the sputtering coefficient dependence on incidence angle at small glancing angles. Keywords: Sputtering coefficients, energy and angular distributions of sputtered particles, interatomic potential, hydrogen isotopes, beryllium.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135988777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/tp.2023.05.56075.14-23
None Louksha O. I., None Zuev A. S., None Malkin A. G., None Semenov E. S., None Trofimov P. A., None Glyavin M. Yu.
The influence of the spent electron beam parameters on the possibilities of multistage energy recovery in the prototype gyrotron developed for the DEMO project is determined. The characteristics of electrodes and magnetic coils in a collector with four-stage recovery were optimized considering the distributions of electrons' coordinates and velocities obtained as a result of calculating the electron-wave interaction in the cavity. In the trajectory analysis in the collector, a sectioned electron beam was used to suppress the negative influence of the bundles of a toroidal solenoid used to create an azimuthal magnetic field. The possibility of achieving the total efficiency of the gyrotron of approximately 78% was shown, which is close to the maximum total efficiency with ideal separation of electron fractions with different energies, with the current of electrons reflected from the collector not exceeding 1% of the total current of the electron beam. Keywords: Microwave electronics, gyrotron, electron beam, energy recovery.
{"title":"Trajectory analysis in a collector with multistage energy recovery for a DEMO prototype gyrotron. Part III. Influence of the spent electron beam parameters","authors":"None Louksha O. I., None Zuev A. S., None Malkin A. G., None Semenov E. S., None Trofimov P. A., None Glyavin M. Yu.","doi":"10.21883/tp.2023.05.56075.14-23","DOIUrl":"https://doi.org/10.21883/tp.2023.05.56075.14-23","url":null,"abstract":"The influence of the spent electron beam parameters on the possibilities of multistage energy recovery in the prototype gyrotron developed for the DEMO project is determined. The characteristics of electrodes and magnetic coils in a collector with four-stage recovery were optimized considering the distributions of electrons' coordinates and velocities obtained as a result of calculating the electron-wave interaction in the cavity. In the trajectory analysis in the collector, a sectioned electron beam was used to suppress the negative influence of the bundles of a toroidal solenoid used to create an azimuthal magnetic field. The possibility of achieving the total efficiency of the gyrotron of approximately 78% was shown, which is close to the maximum total efficiency with ideal separation of electron fractions with different energies, with the current of electrons reflected from the collector not exceeding 1% of the total current of the electron beam. Keywords: Microwave electronics, gyrotron, electron beam, energy recovery.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135988796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.03.54842.251-22
А. Б. Петрин
The method of mirror reflections of electrostatics for a point charge located next to a plane-layered medium consisting of a single film on a dielectric half-space is formulated. The method is generalized to the case of an arbitrary system of charges. The proposed approach is applied to mathematically similar problems of electrostatics and stationary heat conduction of plane-layered media. In particular, the problems of finding distributions of the electrostatic potential around a conducting sphere, an ellipsoid of revolution and a drop-shaped body located near the dielectric film on the dielectric half-space. It is shown how to apply the results obtained for electrostatic problems to similar problems of finding the temperature distribution of uniformly heated bodies of the same geometry located near a heat-conducting film in a heat-conducting half-space.
{"title":"Развитие и обобщение метода отражений в задачах электростатики и теплопроводности плоскослоистых сред","authors":"А. Б. Петрин","doi":"10.21883/jtf.2023.03.54842.251-22","DOIUrl":"https://doi.org/10.21883/jtf.2023.03.54842.251-22","url":null,"abstract":"The method of mirror reflections of electrostatics for a point charge located next to a plane-layered medium consisting of a single film on a dielectric half-space is formulated. The method is generalized to the case of an arbitrary system of charges. The proposed approach is applied to mathematically similar problems of electrostatics and stationary heat conduction of plane-layered media. In particular, the problems of finding distributions of the electrostatic potential around a conducting sphere, an ellipsoid of revolution and a drop-shaped body located near the dielectric film on the dielectric half-space. It is shown how to apply the results obtained for electrostatic problems to similar problems of finding the temperature distribution of uniformly heated bodies of the same geometry located near a heat-conducting film in a heat-conducting half-space.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73993163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.07.55760.60-23
С. А. Гарахин, A.Я. Лопатин, А. Н. Нечай, А.А. Перекалов, А. Е. Пестов, Николай Николаевич Салащенко, Н. Н. Цыбин, Николай Иванович Чхало
Multilayer interference structures acting as dispersion elements for a mirror spectrometer for a wavelength range of 7-30 nm have been calculated and synthesized. Three elements are implemented: for the range λ=7-12 nm – multilayer structure Mo/B4C (periods N=60; period thickness d=6.50 nm); for the range λ=11-18 nm – Mo/Be (N=50; d=9.83 nm) and for the range λ=17-30 nm – Be/Si/Al (N=40; d=18.2 nm). For the entire spectral range, an efficiency of more than 10% was obtained at a wavelength resolution of 0.15-1.0 nm.
{"title":"Дисперсионные элементы зеркального спектрометра на диапазон 7-30 nm","authors":"С. А. Гарахин, A.Я. Лопатин, А. Н. Нечай, А.А. Перекалов, А. Е. Пестов, Николай Николаевич Салащенко, Н. Н. Цыбин, Николай Иванович Чхало","doi":"10.21883/jtf.2023.07.55760.60-23","DOIUrl":"https://doi.org/10.21883/jtf.2023.07.55760.60-23","url":null,"abstract":"Multilayer interference structures acting as dispersion elements for a mirror spectrometer for a wavelength range of 7-30 nm have been calculated and synthesized. Three elements are implemented: for the range λ=7-12 nm – multilayer structure Mo/B4C (periods N=60; period thickness d=6.50 nm); for the range λ=11-18 nm – Mo/Be (N=50; d=9.83 nm) and for the range λ=17-30 nm – Be/Si/Al (N=40; d=18.2 nm). For the entire spectral range, an efficiency of more than 10% was obtained at a wavelength resolution of 0.15-1.0 nm.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"224 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73293351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.06.55612.pravka1
К. В. Жуковский
The plots of the theoretically calculated spectral lines for some free electron lasers (FELs) are presented and explained. The plots allow evaluation of the spectral line width rather than showing real shape of the radiation line.
{"title":"Дополнение к статье \"Генерация гармоник в экспериментах с лазерами на свободных электронах в рентгеновском диапазоне --- теоретический анализ\" (2021, том 91, вып. 3, с. 495--504)","authors":"К. В. Жуковский","doi":"10.21883/jtf.2023.06.55612.pravka1","DOIUrl":"https://doi.org/10.21883/jtf.2023.06.55612.pravka1","url":null,"abstract":"The plots of the theoretically calculated spectral lines for some free electron lasers (FELs) are presented and explained. The plots allow evaluation of the spectral line width rather than showing real shape of the radiation line.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73814038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.08.55977.84-23
Э. Д. Ишкиняев, А. В. Осинцев, В. Н. Петровский, В. Д. Воронов, Е. Н. Блинова, М. А. Либман
This study consideres application of the digital image correlation method for estimating the relative deformations of composite materials obtained with the use of thermal treatment by laser radiation. The use of this technology made it possible to determine the mechanical properties of materials containing macroscopic austenite regions distributed in the martensite matrix according to a given law. The evolution of strain fields that occur when a load is applied to the samples under study is determined. The influence of the shapes and sizes of regions with high plastic properties (austenite) on the integral mechanical characteristics of composite materials has been studied.
{"title":"Исследование деформации композитных материалов на основе метастабильных сплавов системы железо-хром-никель методом корреляции цифровых изображений","authors":"Э. Д. Ишкиняев, А. В. Осинцев, В. Н. Петровский, В. Д. Воронов, Е. Н. Блинова, М. А. Либман","doi":"10.21883/jtf.2023.08.55977.84-23","DOIUrl":"https://doi.org/10.21883/jtf.2023.08.55977.84-23","url":null,"abstract":"This study consideres application of the digital image correlation method for estimating the relative deformations of composite materials obtained with the use of thermal treatment by laser radiation. The use of this technology made it possible to determine the mechanical properties of materials containing macroscopic austenite regions distributed in the martensite matrix according to a given law. The evolution of strain fields that occur when a load is applied to the samples under study is determined. The influence of the shapes and sizes of regions with high plastic properties (austenite) on the integral mechanical characteristics of composite materials has been studied.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"53 10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77039302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.01.54075.233-22
А.В. Хрестин, М. А. Павлейно, М С Сафонов
Numerical simulation of heating of the vicinity of contact spots of closed copper high-current contacts by short-circuit currents of various shapes is carried out. The relationship between the parameters of thermal and mechanical fields when heated to temperatures exceeding the recrystallization temperature of the material is established. The dynamics of changes in the sizes of elastic and plastic deformations and their localization is shown. It is revealed in which cases the results of heating the contact surroundings may differ significantly with the flow of thermally equivalent currents.
{"title":"Изменение характеристик контактных пятен при протекании токов короткого замыкания через замкнутые сильноточные электрические контакты","authors":"А.В. Хрестин, М. А. Павлейно, М С Сафонов","doi":"10.21883/jtf.2023.01.54075.233-22","DOIUrl":"https://doi.org/10.21883/jtf.2023.01.54075.233-22","url":null,"abstract":"Numerical simulation of heating of the vicinity of contact spots of closed copper high-current contacts by short-circuit currents of various shapes is carried out. The relationship between the parameters of thermal and mechanical fields when heated to temperatures exceeding the recrystallization temperature of the material is established. The dynamics of changes in the sizes of elastic and plastic deformations and their localization is shown. It is revealed in which cases the results of heating the contact surroundings may differ significantly with the flow of thermally equivalent currents.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"96 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76528645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.06.55603.278-22
В. С. Козлов, В. Г. Семенов, А. А. Быков, В. Ю. Байрамуков
In the experiments of Mössbauer spectroscopy, transmission electron microscopy (TEM) and atomic force microscopy (AFM) the morphology and structurization of the carbon phase, the charge state of europium and the dynamic properties of europium bis-phthalocyanine pyrolysed derivatives, including the Debye temperature, were revealed. It was found that the pyrolysis of europium bis-pthalocyanine resulted in the amorphous carbon matrix and nanoscaled graphene clusters both forming turbostratic carbon phase. The europium ions in the charge state Eu3+/Eu2+ were detected. The data indicated that localization of Eu ions took place between layers of graphenes similar to graphite intercalation compounds. It was shown that an isomeric shift, linewidths and the magnitude of the resonant absorption are essential characteristics of structural transformations at the pyrolysis of rare earth bis-phthalocyanines.
{"title":"Локализация и зарядовое состояние ионов металла в углеродных наноструктурах пиролизата дифталоцианина европия","authors":"В. С. Козлов, В. Г. Семенов, А. А. Быков, В. Ю. Байрамуков","doi":"10.21883/jtf.2023.06.55603.278-22","DOIUrl":"https://doi.org/10.21883/jtf.2023.06.55603.278-22","url":null,"abstract":"In the experiments of Mössbauer spectroscopy, transmission electron microscopy (TEM) and atomic force microscopy (AFM) the morphology and structurization of the carbon phase, the charge state of europium and the dynamic properties of europium bis-phthalocyanine pyrolysed derivatives, including the Debye temperature, were revealed. It was found that the pyrolysis of europium bis-pthalocyanine resulted in the amorphous carbon matrix and nanoscaled graphene clusters both forming turbostratic carbon phase. The europium ions in the charge state Eu3+/Eu2+ were detected. The data indicated that localization of Eu ions took place between layers of graphenes similar to graphite intercalation compounds. It was shown that an isomeric shift, linewidths and the magnitude of the resonant absorption are essential characteristics of structural transformations at the pyrolysis of rare earth bis-phthalocyanines.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"707 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76862596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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