发布求助
文献互助 智能选刊 最新文献

SIBERIAN JOURNAL OF PHYSICS最新文献

筛选
英文 中文
Towards Flow Visualization in the Region of Air Blowing through the Perforated Section of a Body of Revolution 在空气吹过革命体的穿孔部分区域实现流动可视化
SIBERIAN JOURNAL OF PHYSICS Pub Date : 2024-06-12 DOI: 10.25205/2541-9447-2024-19-1-80-88
V. I. Kornilov, A. A. Pivovarov, A. Popkov
{"title":"Towards Flow Visualization in the Region of Air Blowing through the Perforated Section of a Body of Revolution","authors":"V. I. Kornilov, A. A. Pivovarov, A. Popkov","doi":"10.25205/2541-9447-2024-19-1-80-88","DOIUrl":"https://doi.org/10.25205/2541-9447-2024-19-1-80-88","url":null,"abstract":"The results of visualization of a near-wall turbulent flow with air blowing of various intensity through a perforated surface area on an axisymmetric body with an aspect ratio of 25.3 under conditions of an incompressible flow around are presented. It is shown that the use of the laser knife method with seeding the flow with light-scattering particles 1–2 μm in size, formed from a water-based mixture that includes polyglycol, makes it possible to visualize the structural elements of the near-wall flow region, which are technically difficult to detect by traditional measurement methods.","PeriodicalId":509351,"journal":{"name":"SIBERIAN JOURNAL OF PHYSICS","volume":"67 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141353236","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
Output Energy Regulation During RF Pulse in Proton Linac for Medicine 质子医用直子加速器射频脉冲期间的输出能量调节
SIBERIAN JOURNAL OF PHYSICS Pub Date : 2024-06-11 DOI: 10.25205/2541-9447-2024-19-1-34-42
L. Ovchinnikova, A. Durkin, A. Kurilik, V. Paramonov
{"title":"Output Energy Regulation During RF Pulse in Proton Linac for Medicine","authors":"L. Ovchinnikova, A. Durkin, A. Kurilik, V. Paramonov","doi":"10.25205/2541-9447-2024-19-1-34-42","DOIUrl":"https://doi.org/10.25205/2541-9447-2024-19-1-34-42","url":null,"abstract":"In proton therapy, depth scanning of the irradiated object is performed by changing the Output Energy (OE) of the accelerated beam. In pulsed linear accelerators, adjustment of the OE is usually by changing the amplitude and/or phase of the fi eld in the accelerating elements from one RF pulse to another. The application of non-inertial traveling wave accelerating sections makes it possible to change quickly the phase of the accelerating fi eld during the RF pulse. The phase of the fi eld in the constant gradient section is determined both by the phase of the input RF signal and by the process of wave propagation in the dispersive structure. The calculation results of the traveling wave propagation in the accelerating structure when the phase of the input RF signal changes and the results of simulation the dynamics of particles confirm the change in the linac’s OE during the RF pulse. The proposed method for regulation the OE makes it possible to increase in orders the speed of scanning the irradiated object by depth.","PeriodicalId":509351,"journal":{"name":"SIBERIAN JOURNAL OF PHYSICS","volume":"18 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141357421","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
Studying the Possibility of Dynamic Spin Handling for Polarized Protons and Deuterons at the NICA Accelerator Complex 研究在 NICA 加速器综合设施中对极化质子和氘核进行动态自旋处理的可能性
SIBERIAN JOURNAL OF PHYSICS Pub Date : 2024-06-11 DOI: 10.25205/2541-9447-2024-19-1-5-15
E. V. Bedarev, I. A. Koop, A. Otboev, Y. Shatunov
{"title":"Studying the Possibility of Dynamic Spin Handling for Polarized Protons and Deuterons at the NICA Accelerator Complex","authors":"E. V. Bedarev, I. A. Koop, A. Otboev, Y. Shatunov","doi":"10.25205/2541-9447-2024-19-1-5-15","DOIUrl":"https://doi.org/10.25205/2541-9447-2024-19-1-5-15","url":null,"abstract":"At the Joint Institute for Nuclear Research together with the Institute of Nuclear Physics named after G. I. Budker SB RAS plans to carry out experiments with NICA accelerator complex dedicated to spin effects studying in polarized protons and deuterons collisions. As addendum to the spin physics program, it is being planned experiment by testing P-parity violation in pd-scattering at target. To carry out this experiment, it has to study the possibility of obtaining a p or d beam with dynamically stable longitudinal polarization with different signs. In this paper, we consider investigation of the organization for such configuration of spin using RF rotators in the Nuclotron ring. The spin flip process for deuterons and protons beam has simulated taking into account synchrotron oscillations and energy diffusion. Based on the obtained results, conclusions about opportunity of gaining dynamically stable longitudinal polarization for this way have done.","PeriodicalId":509351,"journal":{"name":"SIBERIAN JOURNAL OF PHYSICS","volume":"87 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141359573","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
Frequency Spectrum of Radiation Flux Generated by Beam-Plasma System with Ten Joules Energy Content in Microsecond Pulse 微秒脉冲中能量含量为 10 焦耳的光束-等离子体系统产生的辐射通量频谱
SIBERIAN JOURNAL OF PHYSICS Pub Date : 2024-04-12 DOI: 10.25205/2541-9447-2023-18-4-79-93
A. V. Arzhannikov, S. Sinitsky, D. Samtsov, P. Kalinin, S. Popov, M. Atlukhanov, E. Sandalov, V. I. Stepanov, K. Kuklin, M. Makarov
{"title":"Frequency Spectrum of Radiation Flux Generated by Beam-Plasma System with Ten Joules Energy Content in Microsecond Pulse","authors":"A. V. Arzhannikov, S. Sinitsky, D. Samtsov, P. Kalinin, S. Popov, M. Atlukhanov, E. Sandalov, V. I. Stepanov, K. Kuklin, M. Makarov","doi":"10.25205/2541-9447-2023-18-4-79-93","DOIUrl":"https://doi.org/10.25205/2541-9447-2023-18-4-79-93","url":null,"abstract":"The work reports the achievement of an energy content of 10 J per microsecond pulse in a directed flux of electromagnetic radiation in the frequency range of ~ 0.2–0.3 THz. The flux is generated by a fundamentally new method, which is realized through the pumping of upper-hybrid plasma oscillations in a magnetized plasma column with a relativistic electron beam (REB) and their subsequent transformation into a flux of electromagnetic radiation. In the described experiments at the GOL-PET facility, this method to generate THz radiation is implemented in the following way a beam of electrons with energy E ~ 0.5 MeV with a current density of (1–2) kA/cm2 is passing through a magnetized (4 T) plasma column with a density of 1014–1015 cm–3. By comparing the experimentally measured spectral composition of the radiation flux with the calculated spectrum, it is proved that this process is realized through resonant pumping of the branch of upper-hybrid plasma waves by such beam. A coordinated increase in plasma density and beam current density opens up the prospect of advancement in the generation of multi-megawatt radiation fluxes in the region of one terahertz.","PeriodicalId":509351,"journal":{"name":"SIBERIAN JOURNAL OF PHYSICS","volume":"26 60","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140711424","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
Non-Destructive Single-Revolution Electron Beam Profilometer based on a CCD Camera 基于 CCD 相机的非破坏性单旋转电子束轮廓仪
SIBERIAN JOURNAL OF PHYSICS Pub Date : 2024-04-12 DOI: 10.25205/2541-9447-2023-18-4-62-70
M. Timoshenko, E. Perevedentsev, S. P. Sherstyuk
{"title":"Non-Destructive Single-Revolution Electron Beam Profilometer based on a CCD Camera","authors":"M. Timoshenko, E. Perevedentsev, S. P. Sherstyuk","doi":"10.25205/2541-9447-2023-18-4-62-70","DOIUrl":"https://doi.org/10.25205/2541-9447-2023-18-4-62-70","url":null,"abstract":"CCD cameras are easy to use and are quite widespread in the optical diagnostics of beams in particle accelerators. The exposure time of these cameras is milliseconds, so they are usually used in a cumulative mode to monitor the circulating beams. The images from the cameras contain information about the transverse distribution of particles in the beam and the position of the center of mass of the beam. In this paper, using the example of CCD cameras installed on the electron-positron collider VEPP-2000, the possibility of their use in the mode of a single beam flight through the observation site is investigated. The intensity of the luminous flux of the optical part of the synchrotron radiation spectrum of the beam was estimated and an image of the transverse distribution of particles in the beam in a single-span mode was experimentally obtained, which confirms the potential for expanding the scope of this diagnostic system. A trial signal processing was done as a demonstration of the determination of the beam parameters by the method under study.","PeriodicalId":509351,"journal":{"name":"SIBERIAN JOURNAL OF PHYSICS","volume":"5 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140710522","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
Technical Project of the Ion Beam Diagnostics System in Phase Space 相空间离子束诊断系统技术项目
SIBERIAN JOURNAL OF PHYSICS Pub Date : 2024-04-12 DOI: 10.25205/2541-9447-2023-18-4-44-53
A. S. Fofanov, I. V. Myasnikova, A. P. Klinov, Yu. A. Shatalov, V. A. Balakin
{"title":"Technical Project of the Ion Beam Diagnostics System in Phase Space","authors":"A. S. Fofanov, I. V. Myasnikova, A. P. Klinov, Yu. A. Shatalov, V. A. Balakin","doi":"10.25205/2541-9447-2023-18-4-44-53","DOIUrl":"https://doi.org/10.25205/2541-9447-2023-18-4-44-53","url":null,"abstract":"Increasing requirements for modern acceleration complexes require precise data on ion beams injected into the accelerator. This paper presents a system of ion beam diagnostics that implements the four-slit method and makes it possible to measure the beam current density distribution in the four-dimensional phase space (PS) with high precision. Technical solutions and design features aimed at obtaining the design parameters of the system are described: the range of investigated beam currents from 1 pA to 20 mA with energy up to 50 keV, spatial resolution from 6 mm to 50 μm.","PeriodicalId":509351,"journal":{"name":"SIBERIAN JOURNAL OF PHYSICS","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140708674","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
Dosimetry of Neutron Flow and Gamma-Radiation for two Neutron Beam Shaping Assembly at the VITA Facility using a Scintillator Detector 使用闪烁探测器对 VITA 设备的两个中子束整形组件进行中子流和伽马辐射剂量测定
SIBERIAN JOURNAL OF PHYSICS Pub Date : 2024-04-12 DOI: 10.25205/2541-9447-2023-18-4-71-78
I. Ibrahim, T. Bykov, I. Kolesnikov, E. Sokolova, T. Sycheva, G. Verkhovod, I. Shchudlo, A. Kuznetsov, M. Bikchurina, A. Koshkarev, D. A. Kasatov, V. Porosev, S. Taskaev
{"title":"Dosimetry of Neutron Flow and Gamma-Radiation for two Neutron Beam Shaping Assembly at the VITA Facility using a Scintillator Detector","authors":"I. Ibrahim, T. Bykov, I. Kolesnikov, E. Sokolova, T. Sycheva, G. Verkhovod, I. Shchudlo, A. Kuznetsov, M. Bikchurina, A. Koshkarev, D. A. Kasatov, V. Porosev, S. Taskaev","doi":"10.25205/2541-9447-2023-18-4-71-78","DOIUrl":"https://doi.org/10.25205/2541-9447-2023-18-4-71-78","url":null,"abstract":"The BNCT method is considered one of the promising methods of external beam therapy in the treatment of radioresistant tumors such as glioblastoma, melanoma and others, which selectively destroy cancer cells due to previous accumulations of boron-10 isotopes stable inside them, and subsequent irradiation with epithermal neutrons. As a result of neutron capture by boron, nuclear radiation interacts with the release of a large amount of energy (charged particles with a high linear energy transfer), which leads to the destruction of the cancer cell. This method is distinguished by a short number of treatment sessions compared to traditional radiation therapy (photons and electrons). In this study, the boron dose rate and the dose rate of gamma radiation in air and in a water phantom are measured using a small-sized neutron detector with a pair of cast polystyrene scintillators, one of which is enriched with boron, developed at BINP. Two neutron beam shaping assembly were used, one with a magnesium fluoride crystal moderator and the other with a Plexiglas moderator. The article will present the experimental results, discuss the features of the neutron beam shaping assembly and formulate recommendations for conducting clinical trials of the BNCT technique","PeriodicalId":509351,"journal":{"name":"SIBERIAN JOURNAL OF PHYSICS","volume":"47 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140711234","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
Results of Reconstruction of U400M Cyclotron Magnetic Structure U400M 回旋加速器磁结构的重建结果
SIBERIAN JOURNAL OF PHYSICS Pub Date : 2024-04-12 DOI: 10.25205/2541-9447-2023-18-4-36-43
I. Ivanenko, I. Kalagin, N. Osipov, V. Semin, V. Zarubin
{"title":"Results of Reconstruction of U400M Cyclotron Magnetic Structure","authors":"I. Ivanenko, I. Kalagin, N. Osipov, V. Semin, V. Zarubin","doi":"10.25205/2541-9447-2023-18-4-36-43","DOIUrl":"https://doi.org/10.25205/2541-9447-2023-18-4-36-43","url":null,"abstract":"U400M isochronous cyclotron was create on the base of U300 classic cyclotron and is under operation at FLNR, JINR since 1996. U400M cyclotron is intended for accelerating the ion beams with A/Z= 2.286 – 9 to energy W = 80 – 6 MeV/nucl. Cyclotron have H-type main magnet with 4-meter pole diameter and 4 pairs of spiral type sectors. In 2022 year, the reconstruction of cyclotron magnetic structure was held on. The reconstruction included the replacement of magnet main coil, mapping and correction of cyclotron magnetic field. In the frame of the mapping, the magnetic field was corrected to improve its average radial distribution and to compensate the first harmonic. For cyclo- tron magnetic field mapping the automatic measurement system, based on 14 Hall probes, was used.","PeriodicalId":509351,"journal":{"name":"SIBERIAN JOURNAL OF PHYSICS","volume":"8 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140709963","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
Wide-aperture Faraday Cup for the High-Intensity Linear Proton Accelerator of the Project DARIA 用于 DARIA 项目高强度直线质子加速器的宽孔径法拉第杯
SIBERIAN JOURNAL OF PHYSICS Pub Date : 2024-04-12 DOI: 10.25205/2541-9447-2023-18-4-54-61
S. A. Gavrilov, Yu. G. Kalinin, A. I. Titov
{"title":"Wide-aperture Faraday Cup for the High-Intensity Linear Proton Accelerator of the Project DARIA","authors":"S. A. Gavrilov, Yu. G. Kalinin, A. I. Titov","doi":"10.25205/2541-9447-2023-18-4-54-61","DOIUrl":"https://doi.org/10.25205/2541-9447-2023-18-4-54-61","url":null,"abstract":"One of the main problems for beam diagnostics in the projected linear proton accelerator for the DARIA compact neutron source is the high pulse and average beam power combined with a relatively low energy, that significantly limits the choice of possible diagnostic instruments and methods. For basic beam current measurements and tuning procedures in the low-energy part of the accelerator, a wide-aperture water-cooled Faraday cup was developed. This paper presents design features, estimations of thermal loads during typical operation and experimental results of the cup tests at a high-intensity proton beam, also the design features of such devices are described, considering the influence of the beam space charge on the measurement results.","PeriodicalId":509351,"journal":{"name":"SIBERIAN JOURNAL OF PHYSICS","volume":"25 30","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140711592","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
Sequential Computer Simulation of H-minus Ion Dynamics from Source to RFQ Exit with Beam Rotation 带光束旋转的 H-minus 离子从源头到射频识别出口的连续计算机动力学模拟
SIBERIAN JOURNAL OF PHYSICS Pub Date : 2024-04-09 DOI: 10.25205/2541-9447-2023-18-4-20-27
Yu. A. Budanov, V. A. Kalinin, B. Frolov
{"title":"Sequential Computer Simulation of H-minus Ion Dynamics from Source to RFQ Exit with Beam Rotation","authors":"Yu. A. Budanov, V. A. Kalinin, B. Frolov","doi":"10.25205/2541-9447-2023-18-4-20-27","DOIUrl":"https://doi.org/10.25205/2541-9447-2023-18-4-20-27","url":null,"abstract":"An end-to-end simulation of the beam dynamics in the system of extraction, beam transportation and the first section of the accelerator (RFQ) is carried out. The proposed method of modeling the dynamics of ions from the source to the exit from the RFQ made it possible to quickly and efficiently change the parameters of the matching system depending on the final results of the beam passing into the RFQ. A system for matching a beam of negative hydrogen ions has been developed and optimized, which makes it possible to rotate the beam to block the propagation of cesium into the accelerator channel and to match the beam with RFQ. As a result of optimization of the matching channel, it is possible to obtain an emittance increase in RFQ of no more than 25 % for 90 % of the beam fraction, while the capture of beam particles in the acceleration mode is 98 % of the injected beam. The increased drifts in the matching system leave enough space for the placement of diagnostic equipment, a vacuum system and a beam correction system. The dependence of the beam dynamics in the RFQ on the charge distribution over the beam cross section at the output of the matching channel is established.","PeriodicalId":509351,"journal":{"name":"SIBERIAN JOURNAL OF PHYSICS","volume":"3 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140724443","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书