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Problems of Atomic Science and Technology最新文献

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DEVELOPMENT AND TESTING OF A COMPUTER MODEL OF A SYSTEM FOR FORMING NEUTRON FLUXES ON A LINEAR ELECTRON ACCELERATOR 开发和测试线性电子加速器中子通量形成系统的计算机模型
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-12-12 DOI: 10.46813/2023-148-168
S. Gokov, V. M. Horbach, Yu.G. Kazarinov, V.V. Kantemirov, V. Kasilov, L.N. Kolpakova, O.A. Lyukhtan, E. Tsiats’ko
{"title":"DEVELOPMENT AND TESTING OF A COMPUTER MODEL OF A SYSTEM FOR FORMING NEUTRON FLUXES ON A LINEAR ELECTRON ACCELERATOR","authors":"S. Gokov, V. M. Horbach, Yu.G. Kazarinov, V.V. Kantemirov, V. Kasilov, L.N. Kolpakova, O.A. Lyukhtan, E. Tsiats’ko","doi":"10.46813/2023-148-168","DOIUrl":"https://doi.org/10.46813/2023-148-168","url":null,"abstract":"A computer model of the system for forming neutron fluxes at the output of a linear electron accelerator has been developed in the Geant4 programming environment. The system for forming neutron fluxes consists of a monoenergetic neutron source, a graphite reflector, a polyethylene moderator, lead protection and detector. With the help of the model, a number of virtual experiments on 107 primary neutrons were carried out for the energy range of the neutron source from 0.1 to 1.1 MeV. The dependence of the ratio of the number of neutrons falling on the detector with a reflector to the number of neutrons without a reflector is determined, on the energy of the neutron source. Energy spectra of neutrons falling on the detector are determined. It was established that the graphite reflector not only increases the number of particles falling on the detector, but also moderated the energy spectrum of neutrons. The neutron background in the accelerator bunker when using a reflector decreases from 2 to 7 times, depending on the energy of the neutron source.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139008100","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 GENERATED PUMP ELECTRIC FIELD ON MULTIHARMONIC INTERACTION OF WAVES IN AMPLIFICATION SECTION OF SUPERHETERODYNE FEL 产生的泵浦电场对超外差费尔放大部分多谐波相互作用的影响
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-12-12 DOI: 10.46813/2023-148-186
A. V. Lysenko, O.I. Voroshylo, S. Ilin
{"title":"INFLUENCE OF GENERATED PUMP ELECTRIC FIELD ON MULTIHARMONIC INTERACTION OF WAVES IN AMPLIFICATION SECTION OF SUPERHETERODYNE FEL","authors":"A. V. Lysenko, O.I. Voroshylo, S. Ilin","doi":"10.46813/2023-148-186","DOIUrl":"https://doi.org/10.46813/2023-148-186","url":null,"abstract":"In the cubic nonlinear approximation, we analyze the processes of generating the electric pump field by an electron beam and its effect on the amplification of space charge waves (SCW) in the amplification section of a parametric superheterodyne free-electron laser (FEL). We found that the generated pump electric field amplitude is within 21…33% of the amplitude of the external pump electric field. We showed that the generated pump electric\u0000field is in phase with the external one. It leads to an increase in the growth increments of SCW; therefore, the length of the SCW amplification section is reduced by 22%. We found out that this field does not destroy the mode of amplification of multi-harmonic SCW. Thus, the studied effect makes it possible to create FELs with smaller longitudinal dimensions and powerful electromagnetic waves with a complex multi-harmonic spectrum.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139009235","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
EFFECT OF TRANSIENT LAYERS ON PLASMA ENERGY TRANSFER TO DIFFERENT SURFACES UNDER QSPA EXPOSURES 瞬态层对 QSPA 暴露下等离子体能量传递到不同表面的影响
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-12-12 DOI: 10.46813/2023-148-101
V. Makhlai, I. Garkusha, S. Herashchenko, Y. Volkova, Yu.V. Petrov, N. N. Aksenov, N. V. Kulik, D. V. Yelisyeyev, P. B. Shevchuk, T. Merenkova
{"title":"EFFECT OF TRANSIENT LAYERS ON PLASMA ENERGY TRANSFER TO DIFFERENT SURFACES UNDER QSPA EXPOSURES","authors":"V. Makhlai, I. Garkusha, S. Herashchenko, Y. Volkova, Yu.V. Petrov, N. N. Aksenov, N. V. Kulik, D. V. Yelisyeyev, P. B. Shevchuk, T. Merenkova","doi":"10.46813/2023-148-101","DOIUrl":"https://doi.org/10.46813/2023-148-101","url":null,"abstract":"The plasma energy transfer to plasma-facing materials, as well as the energy and particles exhaust, needs to be extensively studied for the implementation of the next-step fusion reactor project. Analysis of plasma-surface interaction features has been performed using QSPA exposures of reference plasma-facing materials. The parameters of the plasma streams imitated conditions of transient events in a fusion reactor. The influence of an external magnetic field on the energy balance during the plasma-surface interaction is also discussed.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139009770","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 BURN-UP PROFILE OF THE COMPTON NEUTRON DETECTOR Hf-EMITTER IN THE WWER-1000 REACTOR 在 WWER-1000 反应堆中使用的康普顿净空探测器 Hf-EMITTER 的烧毁情况
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-12-12 DOI: 10.46813/2023-148-116
Vladimir Gann, Pylyp Kuznietsov, A. Ulybkin
{"title":"THE BURN-UP PROFILE OF THE COMPTON NEUTRON DETECTOR Hf-EMITTER IN THE WWER-1000 REACTOR","authors":"Vladimir Gann, Pylyp Kuznietsov, A. Ulybkin","doi":"10.46813/2023-148-116","DOIUrl":"https://doi.org/10.46813/2023-148-116","url":null,"abstract":"Several properties of the Compton neutron detector with Hf emitter have been studied in the article. Using the MCNPX program it was shown how the absorption properties can degrade during the 4 fuel campaigns in WWER1000 core. The nuclide composition of the emitter material was calculated for several coaxial layers in order to find out the burn-up profile. To assess the unevenness of the neutron irradiation, the neutron losses within the emitter layers were calculated.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138977136","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
INVESTIGATION OF GAMOW-TELLER STRENGTHS FOR A=34 AND A=37 NUCLEI a=34和a=37原子核的伽莫-泰勒强度研究
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-12-12 DOI: 10.46813/2023-148-028
Malik S. Mehemed, S. Obaid, F. A. Majeed
{"title":"INVESTIGATION OF GAMOW-TELLER STRENGTHS FOR A=34 AND A=37 NUCLEI","authors":"Malik S. Mehemed, S. Obaid, F. A. Majeed","doi":"10.46813/2023-148-028","DOIUrl":"https://doi.org/10.46813/2023-148-028","url":null,"abstract":"In this work, the Gamow-Teller transition strength distributions in sd-shell region were investigated by using shell model. The calculations of B(GT) and their accumulated sum ∑B(GT) for the nuclei 34Ar→34Cl, 34S→34Cl, 37Cl→37Ar, and 37Ca→37K were performed using the shell model by utilizing the USDB and USDA effective interactions in the sd-shell. The transitions for the nuclei are studied. The results for the B(GT) and ∑B(GT) are discussed and compared to the most recent observed data. The measured GT distributions and the cumulative transition intensities B(GT) are in a fair amount of agreement with the theoretical calculations. We have established a qualitative agreement for the individual transformations, and the measured cumulative transformation strengths nearly match the observed ones.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139008259","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
ACOUSTIC DIAGNOSTICS OF COOLANT PHASE TRANSITIONS IN A SUPERCRITICAL CONVECTION WATER LOOP 超临界对流水环路中冷却剂相变的声学诊断
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-12-12 DOI: 10.46813/2023-148-161
O. Bakai, V. M. Boriskin, V. V. Churikov
{"title":"ACOUSTIC DIAGNOSTICS OF COOLANT PHASE TRANSITIONS IN A SUPERCRITICAL CONVECTION WATER LOOP","authors":"O. Bakai, V. M. Boriskin, V. V. Churikov","doi":"10.46813/2023-148-161","DOIUrl":"https://doi.org/10.46813/2023-148-161","url":null,"abstract":"When choosing a coolant for 4th generation reactors, water in a supercritical state is studied. The acoustic method was chosen as one of the research methods, it is optimal under the conditions. Requirements for the device, implementation, and work results are described.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139008805","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
NEUTRON SOURCE BASED ON THE MULTIFUNCTIONAL ACCELERATOR COMPLEX OF THE NSC KIPT 基于 NSC KIPT 多功能复合加速器的中子源
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-12-12 DOI: 10.46813/2023-148-154
G.D. Kovalenko, I.S. Guk, P.I. Gladkikh
{"title":"NEUTRON SOURCE BASED ON THE MULTIFUNCTIONAL ACCELERATOR COMPLEX OF THE NSC KIPT","authors":"G.D. Kovalenko, I.S. Guk, P.I. Gladkikh","doi":"10.46813/2023-148-154","DOIUrl":"https://doi.org/10.46813/2023-148-154","url":null,"abstract":"An overview of existing neutron sources in the world, which are used for fundamental and applied research in various fields of science and technology, was conducted. The possibility of creating a neutron source on the basis of a superconducting electron accelerator, which is the basis of the multi-functional accelerator complex of the National Science Center NSC KIPT, was considered. Based on the design parameters of the electron beam, the intensity of the neutron beam was estimated.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139009897","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 WAKE SURFACE PLASMON-PHONON OSCILLATIONS BY A RELATIVISTIC ELECTRON BUNCH IN A POLAR SEMICONDUCTOR WAVEGUIDE 极性半导体波导中的相对论电子束激发唤醒表面等离子-声子振荡
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-12-12 DOI: 10.46813/2023-148-074
V. Balakirev, I. Onishchenko
{"title":"EXCITATION OF WAKE SURFACE PLASMON-PHONON OSCILLATIONS BY A RELATIVISTIC ELECTRON BUNCH IN A POLAR SEMICONDUCTOR WAVEGUIDE","authors":"V. Balakirev, I. Onishchenko","doi":"10.46813/2023-148-074","DOIUrl":"https://doi.org/10.46813/2023-148-074","url":null,"abstract":"The process of surface wakefields excitation by the relativistic electron bunch in a polar semiconductor waveguide with a vacuum channel for electron bunch propagation is studied. The spectra and spatio-temporal structure of the excited surface wakefield in such system are investigated. It is shown that the excited full surface wakefield in\u0000the terahertz and infrared frequency ranges consists of the fields of LF and HF hybrid plasmon-phonon oscillations. The amplitudes of them are determined.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139007805","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
IMPROVING STABILITY OF THE SELF-INJECTED BUNCH BY VARIATION OF A SEQUENCE OF TWO LASER PULSES PARAMETERS AT WAKEFIELD EXCITATION IN A METAL DENSITY PLASMA 在金属密度等离子体中，通过改变唤醒场激发时的两束激光脉冲序列参数，提高自喷束的稳定性
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-12-12 DOI: 10.46813/2023-148-069
D. Bondar, V. Maslov, I. Onishchenko
{"title":"IMPROVING STABILITY OF THE SELF-INJECTED BUNCH BY VARIATION OF A SEQUENCE OF TWO LASER PULSES PARAMETERS AT WAKEFIELD EXCITATION IN A METAL DENSITY PLASMA","authors":"D. Bondar, V. Maslov, I. Onishchenko","doi":"10.46813/2023-148-069","DOIUrl":"https://doi.org/10.46813/2023-148-069","url":null,"abstract":"The variation of parameters of a sequence of two laser pulses exciting wakefield in a metal density plasma are considered as a way to improve the self-injected bunch stability: suppression of transverse bunch decay and increasing the existing time of a self-injected bunch in plasma are investigated. Two scenarios of parameter variation were considered. In the first scenario, the simultaneous variation of the parameters of both laser pulses was considered; in the second scenario, the set of parameters for one of the laser pulses after variation differed from the set of parameters for the other laser pulse (profiled sequence of 2 laser pulses) was considered.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139008729","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
CONCEPTUAL DESIGN OF A RADIATION-FREE 800 MeV PROTON LINAC 无辐射 800 MeV 质子激光雷达的概念设计
IF 0.2
Problems of Atomic Science and Technology Pub Date : 2023-12-12 DOI: 10.46813/2023-148-126
S.O. Vdovin, O. Manuilenko, M. Shulika, O. Shulika
{"title":"CONCEPTUAL DESIGN OF A RADIATION-FREE 800 MeV PROTON LINAC","authors":"S.O. Vdovin, O. Manuilenko, M. Shulika, O. Shulika","doi":"10.46813/2023-148-126","DOIUrl":"https://doi.org/10.46813/2023-148-126","url":null,"abstract":"Presented is the concept of a 800 MeV proton linear accelerator as a result of long-term research in ion linacs based on alternating-phase focusing (APF) in H-mode structures. Particle motion stability in the medium energy range of 5…100 MeV where the space charge effects are essential and main radiation losses occur, is provided by a combination of modified APF and magnetic focusing. This combined focusing technique can effectively prevent emittance growth and minimize radiation losses.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139008881","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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