V. Yuferov, V. Katrechko, D. Vinnikov, V. Tkachev, S.V. Sharyi, O.M. Ozerov, D.D. Sorokina
The study of SNF reprocessing is impossible without obtaining and studying a multicomponent, low-energy and complex ion beam of an “umbrella” shape. The beam is obtained from a plasma flow created in a plasma source (PS) with a magnetic field of about 3 T, flowing along the axis into a weak magnetic field, at a level of 0.1…0.5 T. At the same time, its density decreases, and the entire energy of the plasma is converted into a jet directed along the axis. To randomize the particles of the jet plasma, a reflecting magnetic field is further placed on the axis. Without changing direction, the plasma flows in a hollow magnetic force tube around a solenoid with a reverse magnetic field. In this region, ions are drawn out in the radial direction towards the annular hole of the “pocket”. The target ions, M (230-277) follow umbrella trajectories and, being neutralized, are deposited in the “pocket” on the inner walls, the remaining ~ 3% are scattered and remain on the walls of the separator.
{"title":"ON THE POSSIBILITY OF OBTAINING A BEAM OF HEAVY IONS IN THE FORM OF AN “OPEN UMBRELLA” WITH SUBSEQUENT DEPOSITION IN THE SEPARATOR MANIFOLD","authors":"V. Yuferov, V. Katrechko, D. Vinnikov, V. Tkachev, S.V. Sharyi, O.M. Ozerov, D.D. Sorokina","doi":"10.46813/2023-146-105","DOIUrl":"https://doi.org/10.46813/2023-146-105","url":null,"abstract":"The study of SNF reprocessing is impossible without obtaining and studying a multicomponent, low-energy and complex ion beam of an “umbrella” shape. The beam is obtained from a plasma flow created in a plasma source (PS) with a magnetic field of about 3 T, flowing along the axis into a weak magnetic field, at a level of 0.1…0.5 T. At the same time, its density decreases, and the entire energy of the plasma is converted into a jet directed along the axis. To randomize the particles of the jet plasma, a reflecting magnetic field is further placed on the axis. Without changing direction, the plasma flows in a hollow magnetic force tube around a solenoid with a reverse magnetic field. In this region, ions are drawn out in the radial direction towards the annular hole of the “pocket”. The target\u0000ions, M (230-277) follow umbrella trajectories and, being neutralized, are deposited in the “pocket” on the inner walls, the remaining ~ 3% are scattered and remain on the walls of the separator.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":"25 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76351844","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}
The results of numerical PIC-simulation of the dynamics of accelerated positron and drive electron bunches under wake acceleration in a dielectric waveguide filled with plasma with a vacuum channel are presented. The wake field was excited by an electron bunch in a quartz dielectric tube inserted into a cylindrical metal waveguide. The inner region of the dielectric tube was filled with plasma with a vacuum channel along the waveguide axis. The difference in the energy and spatial characteristics, acceleration efficiency, emittance, and energy spread for positron and electron bunches is studied for different radii of the vacuum channel and two models of the plasma density dependence on the radius: a homogeneous and an inhomogeneous dependence characteristic of a capillary discharge.
{"title":"INVESTIGATION OF PARAMETERS OF ELECTRON AND POSITRON BUNCHES IN A PLASMA-DIELECTRIC WAKEFIELD ACCELERATOR","authors":"P. Markov, R. Kniaziev, G. Sotnikov","doi":"10.46813/2023-146-061","DOIUrl":"https://doi.org/10.46813/2023-146-061","url":null,"abstract":"The results of numerical PIC-simulation of the dynamics of accelerated positron and drive electron bunches under wake acceleration in a dielectric waveguide filled with plasma with a vacuum channel are presented. The wake field was excited by an electron bunch in a quartz dielectric tube inserted into a cylindrical metal waveguide. The inner region of the dielectric tube was filled with plasma with a vacuum channel along the waveguide axis. The difference in the energy and spatial characteristics, acceleration efficiency, emittance, and energy spread for positron and electron bunches is studied for different radii of the vacuum channel and two models of the plasma density dependence on the radius: a homogeneous and an inhomogeneous dependence characteristic of a capillary discharge.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":"13 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90980453","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 new concept of the main part of multicharged ions linear accelerator (MILAC) NSC KIPT on the combined RF focusing (CRFF) basis is proposed. In CRFF acceleration and focusing of the charged particles occurs at the expense of the same accelerating field. Absence of an external focusing field sources a design and operation of the accelerator main part considerably simplifies. The construction principle of accelerating&focusing channels with CRFF is considered. The mathematical modeling findings of a beam dynamics for particles with mass-to-charge ratio of A/q=5 in the energies range of 1…9.2 МeV/u are resulted. Realization of this focusing method on a basis of an interdigital H type accelerating structure is proposed.
{"title":"NEW CONCEPT OF THE MAIN PART OF MULTICHARGED IONS LINEAR ACCELERATOR ON THE COMBINED RF FOCUSING BASIS","authors":"S. S. Tishkin, O. Dyachenko","doi":"10.46813/2023-146-091","DOIUrl":"https://doi.org/10.46813/2023-146-091","url":null,"abstract":"A new concept of the main part of multicharged ions linear accelerator (MILAC) NSC KIPT on the combined RF focusing (CRFF) basis is proposed. In CRFF acceleration and focusing of the charged particles occurs at the expense of the same accelerating field. Absence of an external focusing field sources a design and operation of the accelerator main part considerably simplifies. The construction principle of accelerating&focusing channels with\u0000CRFF is considered. The mathematical modeling findings of a beam dynamics for particles with mass-to-charge ratio of A/q=5 in the energies range of 1…9.2 МeV/u are resulted. Realization of this focusing method on a basis of an interdigital H type accelerating structure is proposed.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":"15 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88266901","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. Karpus, I. Shliahov, M. Liashchov, V. Borisenko, S. Kochetov, E. Tsiats’ko, O. Shopen
The analysis of the experimental systems for research of secondary electron emission during the interaction of electron beams with matter is presented. The three most common and methodologically developed variants of experimental systems are considered. According to their design features and methodological capabilities, they allow for the study of the main parameters of secondary emission depending on the primary electron beam energy and the sample thickness. The evolution of the experimental measuring systems and their improvement from simple to three-electrode systems with pass-through collectors is considered too. The peculiarities of registration of the secondary electrons current emitted from the studied target surface depending on the structural features of the target device are considered too. Application results of the developed three-electrode measuring system for research thin foil emission characteristics have been discussed.
{"title":"APPLICATION FEATURES OF THE ELECTROSTATIC SYSTEMS FOR MEASURING THE SECONDARY ELECTRON EMISSION YIELD","authors":"S. Karpus, I. Shliahov, M. Liashchov, V. Borisenko, S. Kochetov, E. Tsiats’ko, O. Shopen","doi":"10.46813/2023-146-184","DOIUrl":"https://doi.org/10.46813/2023-146-184","url":null,"abstract":"The analysis of the experimental systems for research of secondary electron emission during the interaction of electron beams with matter is presented. The three most common and methodologically developed variants of experimental systems are considered. According to their design features and methodological capabilities, they allow for the study of the main parameters of secondary emission depending on the primary electron beam energy and the sample thickness. The evolution of the experimental measuring systems and their improvement from simple to three-electrode systems with pass-through collectors is considered too. The peculiarities of registration of the secondary electrons current emitted from the studied target surface depending on the structural features of the target device are considered too. Application results of the developed three-electrode measuring system for research thin foil emission characteristics have been discussed.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":"63 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74409938","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}
The APGD with rotating star-shaped electrodes was applied directly to the surface of liquid as a counter electrode. It was shown that the rotation of electrodes enables the stabilization of the discharged. A high concentration of H2O2 and nitrates were measured. The high level of microbial reduction was shown for inoculated deionized water treated by APGD with rotating electrodes.
{"title":"DIRECT WATER TREATMENT BY APGD WITH ROTATING ELECTRODES","authors":"V. Golota, P. Mohanty, L. Zavada","doi":"10.46813/2023-146-147","DOIUrl":"https://doi.org/10.46813/2023-146-147","url":null,"abstract":"The APGD with rotating star-shaped electrodes was applied directly to the surface of liquid as a counter electrode. It was shown that the rotation of electrodes enables the stabilization of the discharged. A high concentration of H2O2 and nitrates were measured. The high level of microbial reduction was shown for inoculated deionized water treated by APGD with rotating electrodes.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":"2 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75262131","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}
The excitation of an electromagnetic TM mode by a relativistic electron beam in a waveguide with a sinusoidalcorrugated azimuth conducting wall in a constant uniform external guiding magnetic field is theoretically studied. We consider a thin annular electron beam moving along the waveguide axis and rotating at an equilibrium radius around its axis. In the approximation of a small corrugation depth, the analytical dependences of the growth rate of instability and resonant frequencies on the parameters of the beam and waveguide are determined.
{"title":"EXCITATION OF TM MODE BY A RELATIVISTIC ELECTRON BEAM IN AN AZIMUTHALLY CORRUGATED WAVEGUIDE","authors":"V. Ognivenko","doi":"10.46813/2023-146-046","DOIUrl":"https://doi.org/10.46813/2023-146-046","url":null,"abstract":"The excitation of an electromagnetic TM mode by a relativistic electron beam in a waveguide with a sinusoidalcorrugated azimuth conducting wall in a constant uniform external guiding magnetic field is theoretically studied. We consider a thin annular electron beam moving along the waveguide axis and rotating at an equilibrium radius\u0000around its axis. In the approximation of a small corrugation depth, the analytical dependences of the growth rate of instability and resonant frequencies on the parameters of the beam and waveguide are determined.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":"11 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75867057","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. Martynov, O.A. Luchaninov, V. Lukyanova, S. Prokhorets, O. O. Slabospytska, M. Khazhmuradov
The efficiency of diamond coating synthesis depends on both the parameters of the plasma flow and the uniform temperature distribution on the surface of the substrate on which the coating is synthesized. Mathematical modeling of the substrate cooling system in the installation for the deposition of coatings by the gas plasma method was carried out in order to find optimal parameters at which high density and radial uniformity of energy and chemically active particle flows are simultaneously achieved on the substrate in the process of synthesis of diamond coatings. The task was solved by direct search methods using the FlowSimulation module of the SolidWorks package.
{"title":"MODELING OF THE SUBSTRATE COOLING SYSTEM IN THE INSTALLATION FOR THE DEPOSITION OF COATINGS BY THE GAS PLASMA METHOD","authors":"S. Martynov, O.A. Luchaninov, V. Lukyanova, S. Prokhorets, O. O. Slabospytska, M. Khazhmuradov","doi":"10.46813/2023-145-072","DOIUrl":"https://doi.org/10.46813/2023-145-072","url":null,"abstract":"The efficiency of diamond coating synthesis depends on both the parameters of the plasma flow and the uniform temperature distribution on the surface of the substrate on which the coating is synthesized. Mathematical modeling of the substrate cooling system in the installation for the deposition of coatings by the gas plasma method was carried out in order to find optimal parameters at which high density and radial uniformity of energy and chemically active particle flows are simultaneously achieved on the substrate in the process of synthesis of diamond coatings. The task was solved by direct search methods using the FlowSimulation module of the SolidWorks package.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":"29 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88921676","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. Krech, D. Kofanov, I. Khromiuk, O. Okrushko, I. Gerasymov, N. Karavaeva, L. Levchuk, V. Popov, S. Khabuseva
To date, LuAG:Ce crystals are one of the most common scintillators, since they have been known for a long time and there are technologies for mass production of large-volume crystals. However, the scintillation properties of such crystals can be improved by creating mixed crystals with the replacement of some ions by others. In this work, composite scintillators based on the grown LuYAG:Ce inorganic crystals were produced. For the obtained samples, studies of optical transmission, luminescence, light output, and decay time were carried out. The optimal conditions and sizes of crystalline grains for the creation of composite scintillators have been determined.
{"title":"CREATION OF COMPOSITE SCINTILLATORS WITH A SHORT DECAY TIME","authors":"A. Krech, D. Kofanov, I. Khromiuk, O. Okrushko, I. Gerasymov, N. Karavaeva, L. Levchuk, V. Popov, S. Khabuseva","doi":"10.46813/2023-145-043","DOIUrl":"https://doi.org/10.46813/2023-145-043","url":null,"abstract":"To date, LuAG:Ce crystals are one of the most common scintillators, since they have been known for a long time and there are technologies for mass production of large-volume crystals. However, the scintillation properties of such crystals can be improved by creating mixed crystals with the replacement of some ions by others. In this work, composite scintillators based on the grown LuYAG:Ce inorganic crystals were produced. For the obtained samples, studies of optical transmission, luminescence, light output, and decay time were carried out. The optimal conditions and sizes of crystalline grains for the creation of composite scintillators have been determined.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":"172 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79483217","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}
To conduct experiments to determine the amplitude of the electric field and the transformation ratio in the wake field accelerator based on dielectric structures excited by electron bunches of the Almaz-2 electron accelerator, a probe was developed and manufactured. The probe consists of a ¼ wavelength antenna (27 mm) and a detection circuit based on a 2A201A microwave diode. To calibrate the probe, a measuring stand was assembled, consisting of a microwave generator and a horn emitter. A SPEKTRAN spectrum analyzer (Germany) was used as a microwave power meter, and a digital oscilloscope was used as a meter of the detected signal from the probe. The results of measurements made on the stand show that at a microwave radiation power of 26 mW/m2 and an electric microwave field strength of 2.6 V/m at the measurement point, the output signal from the probe is 1 mV.
{"title":"PROBE FOR MEASURING THE LONGITUDINAL COMPONENT OF THE ELECTRIC FIELD IN A DIELECTRIC WAKEFIELD ACCELERATOR","authors":"D.Yu. Zalesky, V. I. Pristupa, V. Us, G. Sotnikov","doi":"10.46813/2023-145-112","DOIUrl":"https://doi.org/10.46813/2023-145-112","url":null,"abstract":"To conduct experiments to determine the amplitude of the electric field and the transformation ratio in the wake field accelerator based on dielectric structures excited by electron bunches of the Almaz-2 electron accelerator, a probe was developed and manufactured. The probe consists of a ¼ wavelength antenna (27 mm) and a detection circuit based on a 2A201A microwave diode. To calibrate the probe, a measuring stand was assembled, consisting of a microwave generator and a horn emitter. A SPEKTRAN spectrum analyzer (Germany) was used as a microwave power meter, and a digital oscilloscope was used as a meter of the detected signal from the probe. The results of measurements made on the stand show that at a microwave radiation power of 26 mW/m2 and an electric microwave field strength of 2.6 V/m at the measurement point, the output signal from the probe is 1 mV.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":"92 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83757497","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}
The preliminary experimental results as well as modeling the heating of thin-foil materials during the passage of high-energy electrons with energy of 15 MeV are presented. Foils of 50 μm titanium, 50 μm aluminum and 125 μm Kapton® were chosen as the test targets. A calculation technique has been developed, which consists of automating the finite difference method applying Python programming language tools. These tools allowed solving the problem of heat distribution in the thin foil, taking into account the ionization losses of the primary electron beam and the black body radiation. The data on the surface temperature distribution of the research samples were obtained. The time for establishing thermal equilibrium was determined taking into account the distribution of the electron beam current density. It is shown that optimization of the main parameters of the high-energy electron beam beam (for example the current density) makes it possible to neglect the thermal loads on these films, which was confirmed during bench tests at 30 MeV electron accelerator of the IHEPNP NSC KIPT.
{"title":"MODELING AND PRELIMINARY EXPERIMENTAL RESULTS OF THIN FILM HEATING DURING THE PASSAGE OF A HIGH-ENERGY ELECTRON BEAM","authors":"M. Luhanko, O. Shopen, S. Karpus, T. Malykhina","doi":"10.46813/2023-145-139","DOIUrl":"https://doi.org/10.46813/2023-145-139","url":null,"abstract":"The preliminary experimental results as well as modeling the heating of thin-foil materials during the passage of high-energy electrons with energy of 15 MeV are presented. Foils of 50 μm titanium, 50 μm aluminum and 125 μm Kapton® were chosen as the test targets. A calculation technique has been developed, which consists of automating the finite difference method applying Python programming language tools. These tools allowed solving the problem of heat distribution in the thin foil, taking into account the ionization losses of the primary electron beam and the black body radiation. The data on the surface temperature distribution of the research samples were obtained. The time for establishing thermal equilibrium was determined taking into account the distribution of the electron beam current density. It is shown that optimization of the main parameters of the high-energy electron beam beam (for example the current density) makes it possible to neglect the thermal loads on these films, which was confirmed during bench tests at 30 MeV electron accelerator of the IHEPNP NSC KIPT.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":"55 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90318958","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：