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Воздействие концентрированных потоков микроволнового излучения на материалы
С. 13–16.
Nefedov V. N.
In book
М.: Московский государственный университет имени М.В. Ломоносова, Научно-исследовательский институт ядерной физики имени Д.В. Скобельцына, 2013.
Bakunina I. A., Мельников В. Ф., Шаин А. В. et al., Геомагнетизм и аэрономия 2025 Т. 65 № 9 С. 1363–1373
Рассмотрена связь особенностей положения и ориентации магнитных жгутов в активной области (АО) с источниками микроволнового (17 ГГц) излучения и излучения в крайнем ультрафиолетовом диапазоне (EUV) при возникновении эруптивных вспышек, сопровождающихся корональными выбросами массы, и вспышек с "запертой" эрупцией. Приведены примеры эруптивных событий, демонстрирующие пространственное совпадение микроволновых источников с расположением магнитных жгутов в АО, восстановленных при ...
Added: June 22, 2026
Abramov-Maximov V. E., I. A. Bakunina, Geomagnetism and Aeronomy, Springer, Switzerland 2023 Vol. 63 No. 7 P. 916–919
We present a study of the frequency of occurrence of quasi-periodic fluctuations (QPFs) of microwave
radiation from solar active regions at the pre-flare stage. We used correlation curves obtained with the
Nobeyama Radioheliograph (NoRH). We analyzed 529 flares of classes X, M, and C (according to the GOES
classification). In a significant number of considered events (approximately 75% ...
Added: December 28, 2023
I. A. Bakunina, Melnikov V. F., Shain A. V. et al., Geomagnetism and Aeronomy 2022 Vol. 62 No. 8 P. 1066–1072
The dynamics of the preflare phase of microwave and ultraviolet emission for M-class X-ray flares in three active regions (ARs), two flares with coronal mass ejections (CMEs) and one flare without a CME, were considered. Extrapolation of the magnetic field in the AR corona showed that eruptive events were associated with the formation of a ...
Added: February 16, 2023
Abramov-Maximov V. E., I. A. Bakunina, Geomagnetism and Aeronomy 2022 Vol. 62 No. 7 P. 895–902
We present a study of the spatial distribution of quasi-periodic oscillations (QPOs) of microwave emission in three solar active regions before flares. The following events are considered: SOL2011-09-06T01:50M5.3, SOL2011-09-25T02:33M4.4, and SOL2012-07-08T04:19C6.6. Daily observations on the Nobeyama Radioheliograph at a frequency of 17 GHz are used. In all three cases, pre-flare trains of the QPOs of ...
Added: February 16, 2023
Bakunina I. A., Мельников В. Ф., Шаин А. В. et al., Известия Крымской астрофизической обсерватории 2022 Т. 118 № 1 С. 65–74
To date, observational signs that determine the ability of solar active region to cause an eruption of matter into the high layers of the solar corona (CME) are not entirely clear. This makes it difficult to understand the physical mechanism of the CME trigger. This paper presents a search for observational signs that may indicate ...
Added: March 23, 2022
Bakunina I. A., Melnikov V. F., Abramov-Maximov V. E. et al., Geomagnetism and Aeronomy 2021 Vol. 61 No. 8 P. 1159–1171
In this study, a comparative analysis was carried out on the preflare and flare conditions for six flares accompanied by coronal mass ejections (CMEs) and five events not accompanied by CMEs. All of the events occurred in the period 2011–2014. The features of the spatial dynamics of microwave emission of active regions (data from the ...
Added: October 29, 2021
Mamontov A. V., Nefedov V. N., Nazarov I. et al., Измерительная техника 2021 № 4 С. 44–48
The actual problem of accelerating and reducing the energy costs of the foam concrete slabs heat treatment technological process is considered. It is shown that to solve this problem, it is advisable to use the microwave radiation energy as a heat source. The main advantages of the microwave method of foam concrete slabs heat treatment ...
Added: May 15, 2021
Bakunina I. A., Melnikov V. F., Morgachev A. S., Geomagnetism and Aeronomy 2020 Vol. 60 No. 7 P. 853–859
The spatial dynamics of microwave emission (data from the Nobeyama Radioheliograph) of activeregions with a complex magnetic field configuration before powerful f lares, as well as the fine structure ofactive sources of ultraviolet (UV) emission based on AIA/SDO data, are studied. It is shown that there isunsteady behavior of microwave sources, along with the ignition ...
Added: January 18, 2021
Melnikov V. F., Morgachev A. S., Bakunina I. A., Astrophysics, Springer Nature Switzerland AG. Part of Springer Nature 2020 Vol. 63 No. 2 P. 252–259
This paper is a study of the spatial dynamics of microwave emission (data from the Nobeyama Radioheliograph) from two active regions NOAA 12673 and NOAA 11261 for several hours prior to powerful class M x-ray flares. The spatial distribution of the radio brightness and emission intensity in certain parts of the active region is found ...
Added: June 25, 2020
Абрамов-Максимов В. Е., Бакунина И.А., В кн.: Труды XXIII Всероссийской ежегодной конференции по физике Солнца “Солнечная и солнечно-земная физика - 2019”, 7-11 октября 2019, ГАО РАН.: Главная (Пулковская) астрономическая обсерватория РАН, 2019. С. 7–10.
We present a study of quasi-periodic oscillations (QPOs) of microwave emission from
some solar active regions (ARs) on pre-flare phase. We used the Nobeyama Radioheliograph
(NoRH) daily observations. The radio maps of the whole solar disk were synthesized in nonstandard
mode with a cadence of ten seconds and ten seconds averaging. We computed the
time series of maximum brightness ...
Added: February 24, 2020
И.А. Бакунина, Мельников В. Ф., Моргачев А. С., В кн.: Труды XXIII Всероссийской ежегодной конференции по физике Солнца “Солнечная и солнечно-земная физика - 2019”, 7-11 октября 2019, ГАО РАН.: Главная (Пулковская) астрономическая обсерватория РАН, 2019. С. 31–34.
Spatial dynamics of microwave radiation of active regions before big flares, as well as the fine structure of active sources of ultraviolet (EUV) radiation are studied. The non-stationarity of the spatial distribution of radio brightness in certain areas of five active regions has been established. It is shown that the spatial dynamics of microwave sources ...
Added: February 24, 2020
I.A. Bakunina, Melnikov V. F., Astronomical and Astrophysical Transactions 2019 Vol. 31 No. 3 P. 251–266
In this paper, we describe the spatial structure and time characteristics of the microwave emission of active region AR 12673 during the rapid changes in the magnetic
ux from September 3 to September 6, 2017 using Nobeyama Radioheliograph observations. It is shown that the microwave emission of the active region exhibits extremely
non-stationary behavior of both spatial ...
Added: October 31, 2019
Bakunina I. A., Мельников В. Ф., Моргачев А. С. et al., В кн.: Труды XXII Всероссийской ежегодной конференции по физике Солнца “Солнечная и солнечно-земная физика - 2018”, 8-12 октября 2018, ГАО РАН, Санкт-Петербург, 2018.: СПб.: Главная (Пулковская) астрономическая обсерватория РАН, 2018. С. 275–278.
In this paper, we describe the spatial structure and time characteristics of the microwave
emission of active region AR 12673 during the rapid changes in the magnetic flux on
September 4, 2017 using Nobeyama Radioheliograph observations. It is shown that the microwave
emission of the active region exhibits extremely dynamic behavior of its spatial
brightness distribution as well as ...
Added: January 5, 2019
СПб.: Главная (Пулковская) астрономическая обсерватория РАН, 2018.
Сборник содержит доклады, представленные на XXII Всероссийскую ежегодную конференцию по физике Солнца «Солнечная и солнечно-земная физика – 2018» (8 – 12 октября 2018 года, ГАО РАН, Санкт-Петербург). Конференция проводилась Главной (Пулковской) астрономической обсерваторией РАН при поддержке Российского фонда фундаментальных исследований, секции «Солнце» Научного совета по астрономии РАН и секции «Плазменные процессы в магнитосферах планет, атмосферах ...
Added: November 21, 2018
Abramov-Maximov V. E., I. A. Bakunina, Physics of Atomic Nuclei 2018 Vol. 81 No. 3 P. 379–383
The radiation of microwave sources above sunspots at a frequency of 17 GHz gives information about the parameters of solar plasma in the regions where the magnetic-field strength is B ∼ 2000 G in the transition region between the chromosphere and corona. Short-period oscillations (with a period of severalminutes) of microwave emission from solar active ...
Added: November 21, 2018
Чекушкин А. М., Юсупов Р. А., Zavyalov V. et al., Журнал радиоэлектроники 2017 № 1 С. 1–8
In this paper we present a new type of cryogenic filter. This filter based on Fabry-Perot interferometer. We use quartz substrate covered by gold grid with low transmission coefficient. Thickness of quartz is 240 um and thickness of gold is 300 nm. The modeling of this filter was done in CST Studio. Filter was tested ...
Added: November 10, 2018
Nefedov V. N., Banov D. K., Bushuev V. D., , in: 2018 International Conference on Actual Problems of Electron Devices Engineering (APEDE).: Саратов: IEEE, 2018. P. 381–386.
The main parameters of beam-type microwave installation with frequency of the electromagnetic field oscillations 2450 MHz, the microwave output power of 4,8 kW for the heat treatment of a carbon fiber parabolic antenna, with heat-resistant epoxy binder, of the aperture diameter 1200 mm, thickness 5 mm are presented. The main results of the temperature distribution ...
Added: October 31, 2018
Nefedov V. N., Махмудов С. А., , in: 2018 International Conference on Actual Problems of Electron Devices Engineering (APEDE).: Саратов: IEEE, 2018. P. 376–380.
A model and method for calculating the temperature distribution of a wide range of materials in a microwave beam-type unit taking into account the reflective walls of the chamber is supposed. The experimental and modeling characteristics of the temperature distribution over the thickness of a homogeneous dielectric material at different distances from the walls of ...
Added: October 30, 2018
Nefedov V. N., Afanas'ev V. V., Ryabikina I. G., , in: 2018 International Conference on Actual Problems of Electron Devices Engineering (APEDE).: Саратов: IEEE, 2018. P. 371–375.
The results of the microwave radiation influence of the electromagnetic field oscillation frequency of 2450 MHz on the process of curing thermosetting epoxy resins, which are used as a binder in the production of polymer composite materials based on basalt, glass and carbon fibers, are presented. It is shown that the density of the cured ...
Added: October 30, 2018
Nefedov V. N., Mamontov A. V., Simonov V. et al., Measurement Techniques 2018 Vol. 61 No. 3 P. 265–270
A method is proposed for constructing radial type microwave devices forming a uniform temperature distribution throughout the volume of pipes made of polymer composite materials The results of theoretical and experimental investigations of the temperature distribution across the thickness of the pipe material are given. The advantages of microwave technologies for curing polymer composite aterials ...
Added: October 9, 2018