Solnechno-Zemnaya Fizika最新文献

Ion activity in quasi-neutral current sheets and discharge plasma in crossed electric and magnetic fields 交叉电场和磁场中准中性电流片和放电等离子体中的离子活动

Solnechno-Zemnaya Fizika Pub Date : 2024-03-26 DOI: 10.12737/szf-101202402

Nikolay Strokin

{"title":"Ion activity in quasi-neutral current sheets and discharge plasma in crossed electric and magnetic fields","authors":"Nikolay Strokin","doi":"10.12737/szf-101202402","DOIUrl":"https://doi.org/10.12737/szf-101202402","url":null,"abstract":"As part of a brief review, a classification is made and information is provided about four experimentally discovered plasma effects, where unexpected behavior of the ionic component appeared and for which there is no unambiguous interpretation. 1. Ions with the highest energies for a quasi-neutral current sheet were recorded at the O-point (island) with the direction of their movement opposite to the electric field at the X-point. 2. In a self-sustaining discharge in crossed electric and magnetic fields (E×B discharge), a large number of ions (not the tails of the distribution function) with energies significantly exceeding the energies equivalent to the discharge voltage are generated. This occurs in a certain range of pressures of the plasma-forming gas and magnetic fields. 3. The discovered region of effective ionization — the “anode layer”, with increasing pressure, moves abruptly from one plasma region to another, which is accompanied by a jump in the ion density up to 16 times. An increase in the magnetic field induction causes, on the contrary, the “anode layer” to jump in the opposite direction with the ion density decreasing 3–4 times. 4. Ion distribution functions in the E×B discharge contain isomagnetic density jumps with a relative amplitude from ~30 to 80 % of the total current at the released energy. Taking into account the “anomalous” behavior of ions in the plasma of quasi-neutral current sheets and discharges in crossed electric and magnetic fields will provide further insight into the processes in space plasma, the physics of coronal heating, and the formation of the solar wind.","PeriodicalId":351867,"journal":{"name":"Solnechno-Zemnaya Fizika","volume":"102 46","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140380966","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

Observational characteristics of oscillations and waves in and around sunspots. Difficulties in observing and interpreting 太阳黑子内部和周围振荡和波浪的观测特征。观测和解释的困难

Solnechno-Zemnaya Fizika Pub Date : 2024-03-26 DOI: 10.12737/szf-101202401

N. Kobanov, A. Chelpanov

{"title":"Observational characteristics of oscillations and waves in and around sunspots. Difficulties in observing and interpreting","authors":"N. Kobanov, A. Chelpanov","doi":"10.12737/szf-101202401","DOIUrl":"https://doi.org/10.12737/szf-101202401","url":null,"abstract":"This paper summarizes the body of work that we have done over the years on the oscillation processes in sunspots, including their umbra, penumbra, and close vicinity. The study analyzes a number of aspects that impede adequate determining of some characteristics of propagating oscillations and lead to misinterpretation. Using running penumbral waves as an example, we show that their horizontal propagation with decreasing frequency is delusive. The effect is due to different oscillations propagating along magnetic field lines with gradually increasing inclination. This also applies to the three-minute oscillations in the sunspot umbral chromosphere. The change in the inclination of the strips in the half-tone space-time diagrams, which are employed to determine the oscillation propagation velocities along coronal loops, is caused by the projection effect as opposed to real changes in the velocity. We propose to use flare modulation of the natural oscillations of the medium to eliminate the uncertainties that arise while measuring the phase differences between signals of the same parameters, which is employed for estimating wave propagation velocities in the solar atmosphere.","PeriodicalId":351867,"journal":{"name":"Solnechno-Zemnaya Fizika","volume":"122 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140380876","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

Photometrical observations and shape modeling of space debris in medium Earth orbits 中地球轨道空间碎片的光度观测和形状建模

Solnechno-Zemnaya Fizika Pub Date : 2024-03-26 DOI: 10.12737/szf-101202410

I. Korobtsev, M. Mishina, Yurii Karavaev, Maxim Eselevich, V. Goryashin

引用次数: 0

Registration of the atmospheric effect of the Hunga Tonga volcano eruption 洪加-汤加火山爆发对大气影响的记录

Solnechno-Zemnaya Fizika Pub Date : 2024-03-26 DOI: 10.12737/szf-101202408

Aleksandr Sorokin, Vasiliy Dobrynin

{"title":"Registration of the atmospheric effect of the Hunga Tonga volcano eruption","authors":"Aleksandr Sorokin, Vasiliy Dobrynin","doi":"10.12737/szf-101202408","DOIUrl":"https://doi.org/10.12737/szf-101202408","url":null,"abstract":"The paper presents the results of recording of acoustic waves, caused by the Hunga Tonga volcano eruption in the South Pacific Ocean on January 15, 2022, in Eastern Siberia at a distance of about 11230 km from the eruption. The received acoustic signal is interpreted as a set of atmospheric waves in a wide range of oscillations. The structure of the signal is similar to signals from the previously known powerful sources: the thermonuclear explosion on Novaya Zemlya in 1961 and the explosion of the Tunguska meteorite in 1908. The acoustic signal was preceded by three trains of low-frequency damped oscillations. We assume that these three trains of oscillations are associated with three important stages in the Hunga Tonga volcano eruption: 1) destruction of Tonga island and formation of an underwater caldera; 2) release of hot magma from the caldera to the ocean surface and release of a large volume of superheated steam into the atmosphere 3) formation of a layered structure from a mixture of superheated steam, ash, and tephra on the ocean surface and formation of an eruptive convective column. Successive phases of the eruption might have contributed to the excitation of acoustic vibrations in a wide range of periods including Lamb waves, internal gravity waves (IGW), and infrasound. We compare the structure of the acoustic signal received in Siberia at a distance of more than 11000 km from the volcano and that of the acoustic signal recorded in Alaska at a distance of more than 9300 km. Using the solution of the linearized Korteweg — de Vries equation, we estimate the energy released during the volcanic eruption.","PeriodicalId":351867,"journal":{"name":"Solnechno-Zemnaya Fizika","volume":"107 46","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140379719","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

Recognition of geomagnetic storms from time series of matrix observations with the muon hodoscope URAGAN using neural networks of deep learning 利用深度学习神经网络从μ介子示波器 URAGAN 的矩阵观测时间序列中识别地磁暴

Solnechno-Zemnaya Fizika Pub Date : 2024-03-26 DOI: 10.12737/szf-101202411

Viktor Getmanov, Alexei Gvishiani, Anatoly Soloviev, Konstantin Zajtsev, Maksim Dunaev, Eduard Ehlakov

引用次数: 0

Isolated substorms according to magnetic measurements at Tixie during minimum solar activity 根据太阳活动最小期间在 Tixie 的磁场测量结果发现的孤立亚暴

Solnechno-Zemnaya Fizika Pub Date : 2023-12-20 DOI: 10.12737/szf-94202310

Dmitry Baishev, Georgy Makarov

引用次数: 0

Correlation analysis of solar flux absolute measurements at 161 and 245 MHz 161 和 245 兆赫太阳通量绝对测量值的相关性分析

Solnechno-Zemnaya Fizika Pub Date : 2023-12-20 DOI: 10.12737/szf-94202306

A. Setov, Dmitriy Kushnarev