Nukleonika最新文献

Numerical studies of plasma edge in W7-X with 3D FINDIF code W7-X等离子体边缘的三维FINDIF数值研究

4区物理与天体物理

Nukleonika Pub Date : 2023-10-06 DOI: 10.2478/nuka-2023-0011

Małgorzata Jabłczyńska, Grzegorz Pełka, Marcin Jakubowski, Marcin Ślęczka

{"title":"Numerical studies of plasma edge in W7-X with 3D FINDIF code","authors":"Małgorzata Jabłczyńska, Grzegorz Pełka, Marcin Jakubowski, Marcin Ślęczka","doi":"10.2478/nuka-2023-0011","DOIUrl":"https://doi.org/10.2478/nuka-2023-0011","url":null,"abstract":"Abstract Modelling of the plasma transport for inherently three-dimensional (3D) problems as in stellarators requires dedicated complex codes. FINDIF is a 3D multifluid plasma edge transport code that has been previously successfully used for the analysis of energy transport in the TEXTOR-DED tokamak [1], where 3D perturbations led to an ergodic structure of field lines in the plasma edge. The ongoing efforts to apply it meaningfully to Wendelstein 7-X (W7-X) plasma problems resulted in advancements in the main model and accompanying tools for mesh generation and post-processing. In order to verify the applicability of the code and to compare with the reported simulation (EMC3-EIRENE) and experimental (OP1.1) results, a series of simulations for varying plasma density, temperature and anomalous transport coefficients as well as for fixed input power were performed. The connection length pattern of FINDIF traced magnetic field lines on the limiter was reproduced and its impact on heat loads was confirmed. An increase in the peak heat load on the limiter with a rise in plasma density, temperature and anomalous plasma transport coefficients was observed. The decay lengths of density, electron temperature and heat flux did not change with density, and were decreasing with temperature and increasing with anomalous plasma transport coefficient, which was compared to the simple scrape-off layer (SOL) model.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"243 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135351993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photomultiplier tube signal conditioning for high-temperature applications 用于高温应用的光电倍增管信号调理

4区物理与天体物理

Nukleonika Pub Date : 2023-10-06 DOI: 10.2478/nuka-2023-0012

Kacper Zezuliński, Andrzej Broslawski, Ivan Slipukhin, Zbigniew Guzik, Tomasz Krakowski, Szymon Burakowski, Łukasz Kaźmierczak, Grzegorz Łubian, Piotr Milewski, Gabriela Saworska, Krystian Trela

引用次数: 0

Mechanical design of the gamma blockers for the high-energy beam transport region of the European Spallation Source 欧洲散裂源高能束流输运区伽马阻滞剂的机械设计

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2023-07-05 DOI: 10.2478/nuka-2023-0010

M. Wojciechowski, Karol S. Szymczyk, S. Wronka

引用次数: 0

Computer-simulated degradation of CF3Cl, CF2Cl2, and CFCl3 under electron beam irradiation 电子束辐照下CF3Cl、CF2Cl2和CFCl3的计算机模拟降解

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2023-07-05 DOI: 10.2478/nuka-2023-0009

Stephen O Kabasa, Yongxia Sun, A. Chmielewski, H. Nichipor

{"title":"Computer-simulated degradation of CF3Cl, CF2Cl2, and CFCl3 under electron beam irradiation","authors":"Stephen O Kabasa, Yongxia Sun, A. Chmielewski, H. Nichipor","doi":"10.2478/nuka-2023-0009","DOIUrl":"https://doi.org/10.2478/nuka-2023-0009","url":null,"abstract":"Abstract Electron beam treatment technologies should be versatile in the removal of chlorofluorocarbons (CFCs) owing to their exceptional cross sections for the thermal electrons generated in the radiolysis of air. Humidity, dose rates, O2 concentration, and CFC concentration influence the efficiency of the destruction process under electron beam treatment. Computer simulations have been used to theoretically demonstrate the destruction of chlorotrifluoromethane (CF3Cl), dichlorodifluoromethane (CF2Cl2), and trichlorofluoromethane (CFCl3) in the air (N2 + O2: 80% + 20%) in room temperature up to a dose of 13 kGy. Under these conditions, it is predicted that the removal efficiency is in the order CF3Cl (0.1%) < CF2Cl2 (7%) < CFCl3 (34%), which shows the dependence of the process on the number of substituted Cl atoms. Dissociative electron attachment with the release of Cl– is the primary process initiating the destruction of CFCs from the air stream. Reactions with the first excited state of oxygen, namely, O(1D), and charge-transfer reactions further promote the degradation process. The degradation products can be further degraded to CO2, Cl2, and F2 by prolonged radiation treatment. Other predicted products can also be removed through chemical processes.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"68 1","pages":"67 - 76"},"PeriodicalIF":0.7,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43355205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Radon exposure in kindergartens in one Bulgarian district 保加利亚一个地区幼儿园的氡暴露情况

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2023-04-25 DOI: 10.2478/nuka-2023-0007

A. Angelova, N. Chobanova, B. Kunovska, D. Djunakova, K. Ivanova, Z. Stojanovska

引用次数: 0

Study of a Compton backscattering wall defects detection device using the Monte Carlo method 康普顿背散射壁缺陷检测装置的蒙特卡罗方法研究

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2023-04-25 DOI: 10.2478/nuka-2023-0008

X. Qin, Jianbo Yang, Zheng Du, Jie Xu, Rui Li, Hui Li, QI Liu

{"title":"Study of a Compton backscattering wall defects detection device using the Monte Carlo method","authors":"X. Qin, Jianbo Yang, Zheng Du, Jie Xu, Rui Li, Hui Li, QI Liu","doi":"10.2478/nuka-2023-0008","DOIUrl":"https://doi.org/10.2478/nuka-2023-0008","url":null,"abstract":"Abstract In view of the shortcomings of traditional wall defect detection methods, such as small detection range, poor accuracy, non-portable device, and so on, a wall defects detection device based on Compton backscattering technology is designed by Monte Carlo method, which is mainly used to detect the size and location information of defects in concrete walls. It mainly consists of two parts, the source container and the detection system: first, through the simulation and analysis of the parameters such as the receiving angle of the backscattered particles and the rear collimating material of the detector, the influence of the fluorescent X-ray peak of the detector collimating material on the backscattered particle counts is eliminated and the detected error is reduced; second, the ring array detector design, compared with single array detector and surface array detector, can facilitate real-time detection of defect orientation, expanding the single scan range and improving the detection efficiency. After simulation and comparative analysis, the relevant optimal parameters are obtained: the object is detected using a Cs-137 γ-ray source with an activity of 6 mCi, and a ring detector consisting of four 0.5-inch cube-shaped CsI scintillator detectors is placed at 150° to receive the backscattered photons. The simulation analysis using the Monte Carlo FLUKA program showed that the maximum depth of wall defect detection is 8 cm, the maximum error fluctuation range of defect depth and thickness is ±1 cm, the overall device weight is <20 kg, and the measurement time is <5 min.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"68 1","pages":"57 - 63"},"PeriodicalIF":0.7,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47609724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structure and local parameters of self-compressed plasma streams in external magnetic field 外磁场中自压缩等离子体流的结构和局部参数

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2023-03-01 DOI: 10.2478/nuka-2023-0001

Yu.Ye. Volkova, D. Solyakov, A. Marchenko, Volodymyr Chebotarev, I. Garkusha, V. Makhlai, Maryna S. Ladygina, T. Merenkova, D. Yeliseyev, Yurii Petrov, Valerii Staltsov

引用次数: 0

Capabilities of Thomson parabola spectrometer in various laser-plasma- and laser-fusion-related experiments 汤姆逊抛物线光谱仪在各种激光等离子体和激光聚变相关实验中的能力

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2023-03-01 DOI: 10.2478/nuka-2023-0005

P. Tchórz, M. Szymanski, M. Rosiński, T. Chodukowski, S. Borodziuk

{"title":"Capabilities of Thomson parabola spectrometer in various laser-plasma- and laser-fusion-related experiments","authors":"P. Tchórz, M. Szymanski, M. Rosiński, T. Chodukowski, S. Borodziuk","doi":"10.2478/nuka-2023-0005","DOIUrl":"https://doi.org/10.2478/nuka-2023-0005","url":null,"abstract":"Abstract The Thomson parabola spectrometer (TPS) [1] is a well-known, universal diagnostic tool that is widely used in laser plasma experiments to measure the parameters of accelerated ions. In contrast to other popular ion diagnostics, such as semiconductor detectors or ion collectors, the TPS is not greatly affected by electromagnetic pulses generated during high-power laser interaction with matter and can be tuned to acquire data in various energy ranges of accelerated ions, depending on the goal of the experiment. Despite the many advantages of this diagnostic device, processing the collected data is a difficult task and requires a lot of caution during interpretation of gathered results. In this work, we introduce the basic principles of operation and data analysis based on the numerical tool created specifically for the TPS designed at the Institute of Plasma Physics and Laser Microfusion, present a range of data obtained during various recent experiments in which our TPS was used, and highlight the difficulties in data analysis depending on the purpose of the experiment and the experimental setup.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"68 1","pages":"29 - 36"},"PeriodicalIF":0.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45951817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Kinetic energy partitions in electron–ion PIC simulations of ABC fields ABC场电子-离子PIC模拟中的动能分配

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2023-03-01 DOI: 10.2478/nuka-2023-0004

Qin Chen

引用次数: 0

Using microwave refraction to determine local inhomogeneities of a rotating plasma 用微波折射测定旋转等离子体的局部不均匀性

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2023-03-01 DOI: 10.2478/nuka-2023-0003

Yu.P. Martseniuk, Y. Siusko, Y. Kovtun

引用次数: 0