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TEMPORAL EVOLUTION OF THE PLASMA DENSITY CAVITY CAUSED BY INHOMOGENEOUS STOCHASTIC ELECTRIC FIELDS 非均匀随机电场引起的等离子体密度腔的时间演化
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-08-21 DOI: 10.46813/2023-146-021
N. Azarenkov, D. Chibisov, O. Chibisov
{"title":"TEMPORAL EVOLUTION OF THE PLASMA DENSITY CAVITY CAUSED BY INHOMOGENEOUS STOCHASTIC ELECTRIC FIELDS","authors":"N. Azarenkov, D. Chibisov, O. Chibisov","doi":"10.46813/2023-146-021","DOIUrl":"https://doi.org/10.46813/2023-146-021","url":null,"abstract":"The time evolution of the formation of a plasma density cavity caused by inhomogeneous stochastic electric fields is investigated. The Fokker-Planck equation, which governs the temporal evolution of the plasma electron density due to localized stochastic inhomogeneous electric fields in the frequency range of lower hybrid oscillations,\u0000is solved numerically. The spatial dependence of the plasma electron density for various times is obtained.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79775594","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}
引用次数: 0
THE PHYSICO-TOPOLOGICAL SIMULATION OF A TRANSMISSION X-RAY TUBE WITH INDUCTION HEATING OF THE CATHODE 阴极感应加热的透射x射线管的物理拓扑模拟
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-08-21 DOI: 10.46813/2023-146-190
S. O. Maikut, A. I. Kuzmichev, L. Tsybulsky, N. Shynkarenko
{"title":"THE PHYSICO-TOPOLOGICAL SIMULATION OF A TRANSMISSION X-RAY TUBE WITH INDUCTION HEATING OF THE CATHODE","authors":"S. O. Maikut, A. I. Kuzmichev, L. Tsybulsky, N. Shynkarenko","doi":"10.46813/2023-146-190","DOIUrl":"https://doi.org/10.46813/2023-146-190","url":null,"abstract":"Physico-topological simulation of a transmission X-ray tube (TRT) with inductionally heated thermionic cathode is presented, taking into account physical properties of functional elements and their design. Modeling is based on physical fundamentals for vacuum electronics and electrodynamics using ComSol. The distributions of electromagnetic fields, currents, temperature, and trajectories of thermoelectrons were calculated. The analysis of electron trajectories made it possible to optimize TRT topology and design.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89800602","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}
引用次数: 0
PENNING-TYPE H– ION SOURCE WITH METAL HYDRIDE CATHODE IN PULSATING REGIME 脉动状态下金属氢化物阴极彭宁型氢离子源
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-08-21 DOI: 10.46813/2023-146-126
I. Sereda, Ya. O. Hrechko, N. Azarenkov
{"title":"PENNING-TYPE H– ION SOURCE WITH METAL HYDRIDE CATHODE IN PULSATING REGIME","authors":"I. Sereda, Ya. O. Hrechko, N. Azarenkov","doi":"10.46813/2023-146-126","DOIUrl":"https://doi.org/10.46813/2023-146-126","url":null,"abstract":"The features of H– ion emission from gas-feed-free Penning-type ion source with metal hydride cathode have been studied in pulsating regime. The metal hydride cathode provided local injection of hydrogen in activated state and impacts on Penning discharge ability to emit H– ions in the longitudinal direction. For stimulation of pre-excited\u0000hydrogen desorption from metal hydride the voltage pulse (4.5 kV, τ ≈ 15 µs) was performed against the background constant voltage of 6 kV on the anode of the discharge. The H– ion current of about 0.2 mA was obtained.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79143626","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}
引用次数: 0
INFLUENCE OF THE ENERGY PARAMETERS OF THE PRIMARY CIRCUIT ON THE CURRENT CHARACTERISTICS OF THE DIN-2K ACCELERATOR 一次电路能量参数对din-2k加速器电流特性的影响
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-08-21 DOI: 10.46813/2023-146-036
D. Vinnikov, V. Katrechko, O.M. Ozerov, V. Tkachev, S. Marchenko, V. Yuferov, O. Manuilenko
{"title":"INFLUENCE OF THE ENERGY PARAMETERS OF THE PRIMARY CIRCUIT ON THE CURRENT CHARACTERISTICS OF THE DIN-2K ACCELERATOR","authors":"D. Vinnikov, V. Katrechko, O.M. Ozerov, V. Tkachev, S. Marchenko, V. Yuferov, O. Manuilenko","doi":"10.46813/2023-146-036","DOIUrl":"https://doi.org/10.46813/2023-146-036","url":null,"abstract":"Optimal voltage values were established for plasma guns and the pulsed current generator providing maximum break current values. The current values were determined for the plasma jumper formation region. The optimal time delay between the triggering of the plasma guns and the pulsed current generator has been established. The beam\u0000current was measured in the region behind the vacuum diode and in the plasma jumper region. The ultimate current was determined for the available plant geometry.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84360231","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}
引用次数: 0
STRUCTURES OF VORTEXES NEAR THE POLES OF PLANETS OF THE SOLAR SYSTEM 太阳系行星两极附近的涡旋结构
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-08-21 DOI: 10.46813/2023-146-113
V. Maslov, M. Casse, O. Cheremnykh, A. Fomina, D. Grasso, R. Kholodov, O. Novak, R. Ovsiannikov
{"title":"STRUCTURES OF VORTEXES NEAR THE POLES OF PLANETS OF THE SOLAR SYSTEM","authors":"V. Maslov, M. Casse, O. Cheremnykh, A. Fomina, D. Grasso, R. Kholodov, O. Novak, R. Ovsiannikov","doi":"10.46813/2023-146-113","DOIUrl":"https://doi.org/10.46813/2023-146-113","url":null,"abstract":"In the vicinity of the poles of the planets of the solar system, ordered crystals of vortices and intermittency are observed. The formation of vortex structures in the vicinity of the poles of the planets of the solar system is investigated. The conditions for the formation of vortexes are considered. A nonlinear equation was found describing the vortex dynamics and structures were studied.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86758737","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}
引用次数: 0
STUDY OF THE FUNGICIDAL PROPERTIES OF OZONE TREATMENT, Ag AND Cu NANOPARTICLES AND THEIR COMBINED ACTION ON THE MODEL OF SANITARY SIGNIFICANT MOLD SAPROPHYTE ASPERGILLUS FLAVUS 臭氧处理、银纳米粒子和铜纳米粒子的杀菌性能及其对卫生意义重大的腐生黄曲霉模型的联合作用研究
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-08-21 DOI: 10.46813/2023-146-151
G. Taran, B. Kadolin, M. O. Yaroshenko, B. T. Stegniĭ
{"title":"STUDY OF THE FUNGICIDAL PROPERTIES OF OZONE TREATMENT, Ag AND Cu NANOPARTICLES AND THEIR COMBINED ACTION ON THE MODEL OF SANITARY SIGNIFICANT MOLD SAPROPHYTE ASPERGILLUS FLAVUS","authors":"G. Taran, B. Kadolin, M. O. Yaroshenko, B. T. Stegniĭ","doi":"10.46813/2023-146-151","DOIUrl":"https://doi.org/10.46813/2023-146-151","url":null,"abstract":"A study was conducted to determine the fungicidal activity of a sanitary contaminant of feeds – representatives of the genus Aspergillus Mich. – species of Aspergillus flavus using the ozone treatment method, treatment with the composition of Ag and Cu nanoparticles and the combined effect of these methods. When studying the combined effect of ozone, NPAg and NPCu, it was found that at the concentration ratio of 100:100 μg/cm3, there was a fungicidal effect on museum strains of Aspergillus flavus test cultures, i.e., the combination with ozone enhanced the antifungal properties of nanocomplex.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88226396","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}
引用次数: 0
THE ROLE OF HIGHER MOMENTS ON THE DISTRIBUTION OF PARTICLES IN THE SPACE OF IMPULSES AT CYCLOTRON RESONANCES 高矩对回旋加速器共振脉冲空间中粒子分布的作用
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-08-21 DOI: 10.46813/2023-146-016
V. Buts, V. Kuzmin
{"title":"THE ROLE OF HIGHER MOMENTS ON THE DISTRIBUTION OF PARTICLES IN THE SPACE OF IMPULSES AT CYCLOTRON RESONANCES","authors":"V. Buts, V. Kuzmin","doi":"10.46813/2023-146-016","DOIUrl":"https://doi.org/10.46813/2023-146-016","url":null,"abstract":"The results of the analysis of the dynamics of charged particles under conditions of cyclotron resonances in the field of an intense electromagnetic wave are presented. Particular attention is paid to regimes with dynamic chaos. It is shown that there are two qualitatively different regimes. The appearance of the first one is due to the overlap of nonlinear cyclotron resonances. The second mode is related to intermittency. The moments and spectra of each of these regimes are determined. It is shown that with an increase in the intensity of an external electromagnetic wave, the first regime appears at the beginning and only then the second regime appears. A characteristic feature of the second regime is intermittency. Steps appear on the time dynamics of pulses in the second mode. It is shown that the spectra in the second mode are narrower than in the first mode. A characteristic feature of the second regime (the regime with intermittency) is the fact that the higher moments turn out to be larger than the lower moments. In the first regime, the highest moments decrease rapidly. To find the particle momentum distribution function, the generalized Fokker-Planck equation was used. Solutions of this equation are written out for some important cases.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73753883","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}
引用次数: 0
EXCITATION OF DURABLE VHF OSCILLATIONS IN FERRITE-FILLED COAXIAL LINES 铁氧体填充同轴线路中VHF持久振荡的激发
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-08-21 DOI: 10.46813/2023-146-008
I. Magda, V. Mukhin, V. Sinitsin, S. Karelin, O. Lebedenko, M. Volovenko, O. Rak
{"title":"EXCITATION OF DURABLE VHF OSCILLATIONS IN FERRITE-FILLED COAXIAL LINES","authors":"I. Magda, V. Mukhin, V. Sinitsin, S. Karelin, O. Lebedenko, M. Volovenko, O. Rak","doi":"10.46813/2023-146-008","DOIUrl":"https://doi.org/10.46813/2023-146-008","url":null,"abstract":"Effective methods are suggested for exciting gigahertz-range oscillations in coaxial lines that contain ferrite rings and isotropic material. Within the gyrotropic section, the primary pulsed waveform gets transformed from the TEM into a TM mode. Its further development is analyzed, following the results of real-life and numerical experiments. Special attention is paid to amplitude variations of the ТМ mode, owing to the nonlinear response of the ferrite.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87021541","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}
引用次数: 0
SIMULATION OF CAPACITIVELY COUPLED RF DISCHARGE IN ARGON 氩中电容耦合射频放电的模拟
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-08-21 DOI: 10.46813/2023-146-129
V. Lisovskiy, S. Dudin, A. Shakhnazarian, P. Platonov, V. Yegorenkov
{"title":"SIMULATION OF CAPACITIVELY COUPLED RF DISCHARGE IN ARGON","authors":"V. Lisovskiy, S. Dudin, A. Shakhnazarian, P. Platonov, V. Yegorenkov","doi":"10.46813/2023-146-129","DOIUrl":"https://doi.org/10.46813/2023-146-129","url":null,"abstract":"In this work, the axial profiles of the density of electrons and positive ions, the mean electron energy, the electric field strength, and the potential were obtained, both on average over the period and in dynamics. It was shown that argon discharges are dominated by ionization by electrons that gained energy by stochastic heating during the expansion of near-electrode sheaths. This ionization occurs in two pulses during one RF period. At low RF voltage between the electrodes, the role of Ohmic heating of electrons in the electric field in a quasi-neutral plasma increases, but the contribution of stochastic heating remains dominant. The time-averaged plasma potential was found to\u0000increase non-linearly with the RF voltage between the electrodes Urf. It is shown that at low Urf values (when the RF voltage approaches the discharge extinction curve), the average potential  can reach Urf due to the axial redistribution of the instantaneous potential in the gap between the electrodes.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83289077","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}
引用次数: 0
SIMULTANEOUS COMPENSATION OF SECOND AND THIRD ORDER DISPERSION IN CPA LASER SYSTEMS CPA激光系统中二阶色散和三阶色散的同步补偿
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-08-21 DOI: 10.46813/2023-146-041
V. Leshchenko, A. Vasyliev, K. Galaydych, A. Povrozin, G. Sotnikov
{"title":"SIMULTANEOUS COMPENSATION OF SECOND AND THIRD ORDER DISPERSION IN CPA LASER SYSTEMS","authors":"V. Leshchenko, A. Vasyliev, K. Galaydych, A. Povrozin, G. Sotnikov","doi":"10.46813/2023-146-041","DOIUrl":"https://doi.org/10.46813/2023-146-041","url":null,"abstract":"This paper presents a theoretical study aimed at solving the problem of compensation for second and third order dispersion in CPA laser systems. We study the propagation of light pulses generated by a Ti-Sapphire master oscillator along the path of a stretcher-amplifiers-compressor. The wave equation and dispersion balance equations are\u0000used to analyze various Ti-Sapphire amplifier configurations. The research results include the values of the deviation of the compressor length and the angle of incidence of the light pulse on the input diffraction grating of the compressor. Different versions of amplifiers differ in the number of passes of a light pulse through Ti-Sapphire crystals and in the geometric profile of the crystals. The results obtained are presented in the Table. This research is essential for the development of more efficient CPA laser systems.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75106197","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}
引用次数: 0
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