{"title":"Computer simulation of multi-gigawatt magnetic compression lines","authors":"V. Patrakov, S. Rukin","doi":"10.56761/efre2022.s6-p-017001","DOIUrl":"https://doi.org/10.56761/efre2022.s6-p-017001","url":null,"abstract":"Magnetic compression lines (MCL) are novel solid-state devices for multi-gigawatt sub-nanosecond and picosecond pulse amplification. Their operation is based on the interaction of magnetic field created by a powerful nanosecond or sub-nanosecond pulse with the magnetization vector in a ferrite medium. In this study a numerical model of an MCL was created, based on Maxwell’s equations and Landau-Lifshitz-Gilbert equation for magnetization dynamics. The equation system is solved using COMSOL Multiphysics simulation software. The model shows good agreement with the experimental data. Using the created model, the process of power amplification in MCL was analyzed in terms of magnetic field and magnetization vectors. Based on this analysis, the mechanism of unipolar pulse amplification has been proposed.","PeriodicalId":156877,"journal":{"name":"8th International Congress on Energy Fluxes and Radiation Effects","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130231374","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}
{"title":"Material processing using arc plasmatrons with thermochemical cathodes","authors":"A. Anshakov, P. Domarov, V. Faleev","doi":"10.56761/efre2022.c1-o-042601","DOIUrl":"https://doi.org/10.56761/efre2022.c1-o-042601","url":null,"abstract":"To heat oxygen-containing media in various technological processes, a special class of electric arc plasma generators is used, which use a thermochemical cathode based on hafnium or zirconium. Information about such electrodes is given and their performance in plasmatrons for cutting metals, spraying powder materials, heating gases with a power of 10–50 kW is shown.","PeriodicalId":156877,"journal":{"name":"8th International Congress on Energy Fluxes and Radiation Effects","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128672463","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}
{"title":"Glow of own defects in ZnO polycrystals","authors":"N. Aluker","doi":"10.56761/efre2022.r1-p-047802","DOIUrl":"https://doi.org/10.56761/efre2022.r1-p-047802","url":null,"abstract":"The photoluminescence of ZnO powders at room temperature upon excitation by microsecond pulses from the region of interband transitions and the region of exciton absorption has been studied. In the luminescence spectra, two regions characteristic of ZnO are observed: a short-wavelength region associated in the literature with exciton luminescence, and a long-wavelength region due to the presence of growth structural and impurity defects. The observed long-wavelength glow is divided into components with different glow durations, and several components that form this glow are identified. Experimental results and an analysis of the energy of formation and survival of the main structural defects make it possible to explain the luminescence of ZnO with allowance for the participation of only defects in the anionic sublattice and excitons in the process.","PeriodicalId":156877,"journal":{"name":"8th International Congress on Energy Fluxes and Radiation Effects","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121865526","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}
Н. А. Лабецкая, И. М. Дацко, С. А. Чайковский, В. Ванькевич, В. Орешкин
{"title":"Плазмообразование в сильных магнитных полях на поверхности двухслойных проводников","authors":"Н. А. Лабецкая, И. М. Дацко, С. А. Чайковский, В. Ванькевич, В. Орешкин","doi":"10.56761/efre2022.s2-o-038701","DOIUrl":"https://doi.org/10.56761/efre2022.s2-o-038701","url":null,"abstract":"Ранее было показано, что использование двухслойной структуры проводника с внешним слоем меньшей проводимости приводит как к задержке начала плазмообразования на его поверхности, так и к подавлению развития неустойчивостей плазмы по сравнению с однородным проводником в полях с максимальной индукцией магнитного поля 200–400 Т. В качестве внешнего слоя использовались титан и цирконий, которые наносились на медный или дюралюминиевый проводник методом вакуумного напыления. В экспериментах, проводившихся на установке МИГ (амплитуда импульса тока до 2.5 МА, фронт нарастания тока 100 нс), в качестве внешнего слоя проводника были использованы молибден и висмут, представлявшимися более перспективными с точки зрения увеличения времени задержки плазмообразования и уменьшения скорости разлета уже образовавшейся плазмы. Было экспериментально показано, что использование молибдена и висмута в качестве внешнего слоя двухслойных проводников не приводит к улучшению результатов по сравнению с титаном и цирконием.","PeriodicalId":156877,"journal":{"name":"8th International Congress on Energy Fluxes and Radiation Effects","volume":"05 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127215766","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}
S. Anishchenko, A. Gurinovich, E. Gurnevich, D. Leonenko, A. Rouba
{"title":"Investigation of wires layout in exploding wire array","authors":"S. Anishchenko, A. Gurinovich, E. Gurnevich, D. Leonenko, A. Rouba","doi":"10.56761/efre2022.s4-p-045301","DOIUrl":"https://doi.org/10.56761/efre2022.s4-p-045301","url":null,"abstract":"Results of experimental investigation of wires layout in exploding wire array are presented. Straight and zigzag layouts are considered. Zigzag layout can be used to minimize the wire array length. Zigzag layout requires additional insulation to prevent array breakdown – pressurized SF6was used. Requirements for SF6 pressure and distance between wires for zigzag layout were obtained. Influence of wire damage caused by extra tension applied to wires during installation on exploding wire array operation is considered.","PeriodicalId":156877,"journal":{"name":"8th International Congress on Energy Fluxes and Radiation Effects","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123791319","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}
Илья Сергеевич Лопатин, Ю. Х. Ахмадеев, Александр Петров
{"title":"Бессеточная система генерации низкоэнергитического ионного пучка на основе тлеющего разряда с полым катодом и внешней инжекцией электронов","authors":"Илья Сергеевич Лопатин, Ю. Х. Ахмадеев, Александр Петров","doi":"10.56761/efre2022.c1-p-022503","DOIUrl":"https://doi.org/10.56761/efre2022.c1-p-022503","url":null,"abstract":"Разработана система генерации ионного пучка на основе тлеющего разряда с полым катодом и внешней инжекцией электронов. Система предназначена для ионно- пучкового осаждения покрытий на основе алюминия, в том числе его оксида. Особенностью системы является отсутствие конструктивного элемента, определяющего границу плазмы. Граница плазмы ограничена образованием двойного электростатического слоя между плазмой основного и вспомогательного разрядов. В качестве генератора вспомогательной плазмы использовался ПИНК. Двойной электростатический слой локализовался вблизи эмиссионного окна, через которое осуществлялась встречная эмиссия электронов и ионов. Показано, что диапазон рабочих давлений системы составляет от 0.1 до 1 Па, ток основного разряда составляет единицы ампер. Также показана возможность управления разностью потенциалов на двойном электростатическом слое за счет изменения напряжения горения основного тлеющего разряда с полым катодом и внешней инжекции электронов.","PeriodicalId":156877,"journal":{"name":"8th International Congress on Energy Fluxes and Radiation Effects","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128959537","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}
A. Grishkov, M. Vorobyov, S. Doroshkevich, V. Shklyaev
{"title":"Simulation of a wide-aperture electron accelerator based on ion-electron emission in repetitively pulsed mode","authors":"A. Grishkov, M. Vorobyov, S. Doroshkevich, V. Shklyaev","doi":"10.56761/efre2022.s1-p-049004","DOIUrl":"https://doi.org/10.56761/efre2022.s1-p-049004","url":null,"abstract":"The paper proposes numerical and analytical approaches to modeling the generation of an electron beam in a repetitively pulsed regime of a wide-aperture electron accelerator based on secondary ion-electron emission with a plasma emitter. With the help of known codes and the developed approach, separate modes are simulated. Qualitatively, the obtained experimental results are qualitatively explained, which are in good agreement with the developed approach to modeling.","PeriodicalId":156877,"journal":{"name":"8th International Congress on Energy Fluxes and Radiation Effects","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128967014","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}
{"title":"Investigation of antioxidant properties of cerium oxide nanopowders under nanosecond bremsstrahlung","authors":"A. Gerasimov, M. Balezin, V. Ilves, S. Sokovnin","doi":"10.56761/efre2022.n1-o-028202","DOIUrl":"https://doi.org/10.56761/efre2022.n1-o-028202","url":null,"abstract":"This paper presents a method for measuring the effectiveness of radiomodification using a ferrous sulfate dosimeter, including evaluating the antioxidant activity of the radiomodifying agent. The effect of adding cerium oxide nanoparticles at the concentration of 100 μg/ml on the change in the absorbed dose recorded by the ferrous sulfate dosimeter when irradiated with inhibitory radiation with doses of 25, 50 and 75 Gy was investigated. The results showed low antioxidant activity of the examined nanoparticles and the effect of increasing the absorbed dose in proportion to the irradiation time.","PeriodicalId":156877,"journal":{"name":"8th International Congress on Energy Fluxes and Radiation Effects","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134280772","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}
{"title":"Efficiency of moderately relativistic resonant S-band BWO","authors":"P.V. Molchanov, E. Gurnevich","doi":"10.56761/efre2022.s3-o-028901","DOIUrl":"https://doi.org/10.56761/efre2022.s3-o-028901","url":null,"abstract":"The scheme of a resonant relativistic backward wave oscillator (BWO) was proposed by the group of researchers from IHCE SB RASfor efficient generation of high-power microwave radiation in the S-band while maintaining relatively small structure length about 2.5 λ. As far as can being found from publications, the scheme proposed uses high-current relativistic electron beams with energies of 0.7–1.5 MeV and a strong guiding magnetic field (at least 1.5 T, typically 2–3 T). In this paper, we propose a variant of a resonant relativistic backward wave oscillator that operates at moderately relativistic beam energies (450–550 keV) and at guiding magnetic field values starting from 1.3 T. Compared to the original resonant BWO geometry, in the current investigated scheme, the length of the periodic structure is increased by 1 period. For optimization using particle-in-cell code XOOPIC, the length of the insert between the cutoff-neck and the periodic structure, as well as the profiles of two terminal corrugations (defining the reflections from boundaries of periodic structure) are varied. It is shown in the numerical simulation that for a beam energy of 500–550 keV the average radiation power in proposed RBWO reaches level of 1 GW and efficiency is up to 27–28%.","PeriodicalId":156877,"journal":{"name":"8th International Congress on Energy Fluxes and Radiation Effects","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122568927","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}
{"title":"Электролюминесценция в алмазе","authors":"З.И. Бородулин, М. А. Шулепов","doi":"10.56761/efre2022.n4-p-014802","DOIUrl":"https://doi.org/10.56761/efre2022.n4-p-014802","url":null,"abstract":"В работе представлены результаты исследования электролюминесценции в алмазе при комнатной температуре и приложенном напряжении ~20 В. Для выяснения состава примесей были проведены эксперименты по определению примесно-дефектного состава спектроскопическими методами. Было выявлено, что центры окраски, отвечающие за люминесценцию локализованы в ребрах кристалла и вблизи углублений, нанесенных на одну из граней. Электролюминесценция наблюдается в диапазоне 400–650 нм, с максимальной интенсивностью при 500–514 нм.","PeriodicalId":156877,"journal":{"name":"8th International Congress on Energy Fluxes and Radiation Effects","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128984633","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}