Solar-Terrestrial Physics最新文献_第5页

Latitudinal distribution of solar microflares and high-temperature plasma at solar minimum 太阳微耀斑和高温等离子体在太阳极小期的纬度分布

Solar-Terrestrial Physics Pub Date : 2023-06-29 DOI: 10.12737/stp-92202301

Aleksey Kirichenko, Ivan Loboda, Anton Reva, Artyom Ulyanov, Sergey Bogachev

引用次数: 0

Differences in the response to CME and CIR drivers of geomagnetic disturbances 地磁扰动对CME和CIR驱动响应的差异

IF 1.1

Solar-Terrestrial Physics Pub Date : 2023-06-29 DOI: 10.12737/stp-92202304

B. Namuun, B. Tsegmed, L. Li, G. M. Leghari

引用次数: 0

Precipitation-related increase events of the electromagnetic component of secondary cosmic rays: Spectral analysis 二次宇宙射线电磁成分与降水有关的增加事件:光谱分析

IF 1.1

Solar-Terrestrial Physics Pub Date : 2023-06-29 DOI: 10.12737/stp-92202305

Yuriy V. Balabin, A. Germanenko, B. Gvozdevsky, E. Maurchev, E. Mikhalko

引用次数: 0

Local diagnostics of aurora presence based on intelligent analysis of geomagnetic data 基于地磁数据智能分析的极光局部诊断

Solar-Terrestrial Physics Pub Date : 2023-06-29 DOI: 10.12737/stp-92202303

Andrey Vorobev, Anatoly Soloviev, Vyacheslav Pilipenko, Gulnara Vorobeva, Aliya Gainetdinova, Aleksandr Lapin, Vladimir Belahovskiy, Alexey Roldugin

{"title":"Local diagnostics of aurora presence based on intelligent analysis of geomagnetic data","authors":"Andrey Vorobev, Anatoly Soloviev, Vyacheslav Pilipenko, Gulnara Vorobeva, Aliya Gainetdinova, Aleksandr Lapin, Vladimir Belahovskiy, Alexey Roldugin","doi":"10.12737/stp-92202303","DOIUrl":"https://doi.org/10.12737/stp-92202303","url":null,"abstract":"Despite the existing variety of approaches to monitoring space weather and geophysical parameters in the auroral oval region, the issue of effective prediction and diagnostics of auroras as a special state of the upper ionosphere at high latitudes remains virtually unresolved. In this paper, we explore the possibility of local diagnostics of auroras through mining of geomagnetic data from ground-based sources. We assess the significance of indicative variables and their statistical relationship. So, for example, the application of Bayesian inference to the data from the Lovozero geophysical station for 2012–2020 has shown that the dependence of a posteriori probability of observing auroras in the optical range on the state of geomagnetic parameters is logarithmic, and the degree of its significance is inversely proportional to the discrepancy between empirical data and approximating function. The accuracy of the approach to diagnostics of aurora presence based on the random forest method is at least 86 % when using several local predictors and ~80 % when using several global geomagnetic activity indices characterizing the geomagnetic field disturbance in the auroral zone. In conclusion, we discuss promising ways to improve the quality metrics of diagnostic models and their scope.","PeriodicalId":43869,"journal":{"name":"Solar-Terrestrial Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134997434","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: 1

Ionospheric electric potential as an alternative indicator of solar effect on the lower atmosphere 电离层电势作为太阳对低层大气影响的替代指标

IF 1.1

Solar-Terrestrial Physics Pub Date : 2023-06-29 DOI: 10.12737/stp-92202313

Ashkhen Karahanyan, S. Molodykh

引用次数: 0

Peculiarities of medium parameter dynamics and cosmic ray density in strong Forbush decreases associated with magnetic clouds 强磁云中介质参数动力学和宇宙射线密度的特性

Solar-Terrestrial Physics Pub Date : 2023-06-29 DOI: 10.12737/stp-92202311

Anastasia Petukhova, Ivan Petuhov, Stanislav Petukhov, Ilya Gotovtsev

{"title":"Peculiarities of medium parameter dynamics and cosmic ray density in strong Forbush decreases associated with magnetic clouds","authors":"Anastasia Petukhova, Ivan Petuhov, Stanislav Petukhov, Ilya Gotovtsev","doi":"10.12737/stp-92202311","DOIUrl":"https://doi.org/10.12737/stp-92202311","url":null,"abstract":"Diffusion and electromagnetic mechanisms determine the formation of sporadic Forbush decreases. The diffusion mechanism affects the Forbush decrease amplitude in the turbulent layer, and the part of the coronal mass ejection preceding the magnetic cloud, and its efficiency depends on the level of magnetic field turbulence. The electromagnetic mechanism works in a magnetic cloud, and its efficiency depends on the intensity of regular magnetic and electric fields. We analyze solar wind parameters and cosmic ray density, using the superposed epoch analysis. In 1996–2006, 23 strong Forbush decreases (amplitude >5 %) were detected. The average amplitude of 7 % is equally formed by both mechanisms. The events can be divided into 2 groups depending on the contribution of the mechanisms to Forbush decrease amplitude. Group 1 includes the strongest Forbush decreases (amplitude=8.5 %), formed by both diffusion and electromagnetic mechanisms. The diffusion mechanism forms 0.26 amplitude, and the electromagnetic mechanism is responsible for 0.74 one. In group 2, the averege amplitude Forbush decrease =5.7 %, the diffusion mechanism forms 0.79 of amplitude; and the electromagnetic one, 0.21. The spatial distributions of the mean values of the medium parameters in the region of disturbances in the groups differ. This difference can be explained by the fact that Forbush decrease amplitude in groups 1 and 2 are formed in the central and peripheral parts of coronal mass ejection respectively.","PeriodicalId":43869,"journal":{"name":"Solar-Terrestrial Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135100119","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

Temperature effect of muons registered under the ground in Yakutsk by telescopes on GAS-discharge counters 用气体放电计数器上的望远镜在雅库茨克地下记录的μ子的温度效应

Solar-Terrestrial Physics Pub Date : 2023-06-29 DOI: 10.12737/stp-92202307

Valery Yanchukovsky

引用次数: 0

Cosmic ray fluctuations and MHD waves in the solar wind 宇宙射线波动和太阳风中的MHD波

Solar-Terrestrial Physics Pub Date : 2023-06-29 DOI: 10.12737/stp-92202309

Sergei Starodubtsev, Anton Zverev, Peter Gololobov, Vladislav Grigoryev

{"title":"Cosmic ray fluctuations and MHD waves in the solar wind","authors":"Sergei Starodubtsev, Anton Zverev, Peter Gololobov, Vladislav Grigoryev","doi":"10.12737/stp-92202309","DOIUrl":"https://doi.org/10.12737/stp-92202309","url":null,"abstract":"During large-scale solar wind disturbances, variations in galactic cosmic rays with periods from several minutes to 2–3 hours, which are called cosmic ray fluctuations in the scientific literature, often occur. Such fluctuations are not observed in the absence of disturbances. Since cosmic rays are charged particles, their modulation in the heliosphere occurs mainly under the influence of the interplanetary magnetic field, or rather its turbulent part — MHD waves. In order to adequately describe the relationship between their fluctuation spectra, it is necessary to be able to isolate a certain type of MHD waves from direct measurements of the interplanetary medium parameters. In this paper, we consider some methods for determining the contribution of three solar wind MHD turbulence branches, namely, Alfvén, fast, and slow magnetosonic waves corresponding to the turbulence spectrum inertial region frequencies 10⁻⁴<ν<10⁻¹ Hz, at which cosmic ray fluctuations are observed, to the observed power spectra of interplanetary magnetic field modulus fluctuations. To do this, we apply the methods of spectral and polarization analysis. In the absence of measurement data on SW parameters, to identify the type of MHD turbulence we use the known wave polarization properties that Alfvén and magnetosonic waves are polarized in different planes relative to the plane containing the average IMF vector and wave vector. Our results show that with the correct determination of the spectra of three MHD wave types, their sum, within the limits of errors, agrees well with the observed spectra of the interplanetary magnetic field modulus, and a small difference can be attributed to static inhomogeneities and oscillations frozen into plasma, as well as to various discontinuities that are always inevitably present in the solar wind.","PeriodicalId":43869,"journal":{"name":"Solar-Terrestrial Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135100116","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

Infiltration of CsPbI3:EuI2 Perovskites into TiO2 Spongy Layers Deposited by gig-lox Sputtering Processes CsPbI3:EuI2钙钛矿在gigo -lox溅射沉积的TiO2海绵状层中的渗透

IF 1.1

Solar-Terrestrial Physics Pub Date : 2023-06-27 DOI: 10.3390/solar3030020

C. Spampinato, Paola La Magna, S. Valastro, E. Smecca, V. Arena, C. Bongiorno, G. Mannino, E. Fazio, C. Corsaro, F. Neri, A. Alberti

{"title":"Infiltration of CsPbI3:EuI2 Perovskites into TiO2 Spongy Layers Deposited by gig-lox Sputtering Processes","authors":"C. Spampinato, Paola La Magna, S. Valastro, E. Smecca, V. Arena, C. Bongiorno, G. Mannino, E. Fazio, C. Corsaro, F. Neri, A. Alberti","doi":"10.3390/solar3030020","DOIUrl":"https://doi.org/10.3390/solar3030020","url":null,"abstract":"Perovskite solar cells have become a popular alternative to traditional silicon solar cells due to their potential to provide high-efficiency, low-cost, and lightweight solar energy harvesting solutions. However, the multilayer architecture of perovskite solar cells demands careful investigation of the interaction and interfacing between the various layers, as they play a crucial role in determining the overall performance of the cell. In this context, the present work aims at analyzing the coupling between a spongy transparent electron-transporting layer (ETL) and perovskite in a formulation CsPbI3:EuI2. The ETL used in this work is a transparent mesoporous TiO2 layer called “gig-lox” (grazing incidence angle geometry–local oxidation), which has been optimized to boost the interfacing with the perovskite for achieving a highly interconnected blend of materials. The gig-lox TiO2 ETL shows a high surface wettability with respect to the perovskite solution, especially after pre-annealing at 500 °C, and this enables the perovskite material to deeply infiltrate throughout it. The surface wettability of the gig-lox TiO2 has been estimated by contact angle measurements, while the deep infiltration of the perovskite material has been demonstrated through X-ray diffraction and transmission electron microscopy analyses. Thanks to the achieved deep infiltration, the photo-generated charge injection from the perovskite into the mesoporous oxide is enhanced with respect to the use of a planar compact oxide, as shown by the photoluminescence measurements. The mainstay of the approach resides in the ETL that is deposited by a solvent-free sputtering method and is up-scalable for high industrial throughput.","PeriodicalId":43869,"journal":{"name":"Solar-Terrestrial Physics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88977546","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: 1

Potential Induced Degradation in Photovoltaic Modules: A Review of the Latest Research and Developments 光伏组件的潜在诱导降解:最新研究进展综述

IF 1.1

Solar-Terrestrial Physics Pub Date : 2023-06-07 DOI: 10.3390/solar3020019

G. Badran, Mahmoud Dhimish

{"title":"Potential Induced Degradation in Photovoltaic Modules: A Review of the Latest Research and Developments","authors":"G. Badran, Mahmoud Dhimish","doi":"10.3390/solar3020019","DOIUrl":"https://doi.org/10.3390/solar3020019","url":null,"abstract":"Photovoltaic (PV) technology plays a crucial role in the transition towards a low-carbon energy system, but the potential-induced degradation (PID) phenomenon can significantly impact the performance and lifespan of PV modules. PID occurs when a high voltage potential difference exists between the module and ground, leading to ion migration and the formation of conductive paths. This results in reduced power output and poses a challenge for PV systems. Research and development efforts have focused on the use of new materials, designs, and mitigation strategies to prevent or mitigate PID. Materials such as conductive polymers, anti-reflective coatings, and specialized coatings have been developed, along with mitigation strategies such as bypass diodes and DC-DC converters. Understanding the various factors that contribute to PID, such as temperature and humidity, is critical for the development of effective approaches to prevent and mitigate this issue. This review aims to provide an overview of the latest research and developments in the field of PID in PV modules, highlighting the materials, designs, and strategies that have been developed to address this issue. We emphasize the importance of PID research and development in the context of the global effort to combat climate change. By improving the performance and reliability of PV systems, we can increase their contribution to the transition towards a low-carbon energy system.","PeriodicalId":43869,"journal":{"name":"Solar-Terrestrial Physics","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73335887","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: 2