Results 231 to 240 of about 15,881 (262)
Some of the next articles are maybe not open access.
Solar cycle variation in energetic particle emissivity of the sun
Solar Physics, 1974Long-term variation in energetic particle emissivity of the sun was examined by the use of PCA, solar proton flux, and geomagnetic data from 1941 to 1973. A solar cycle may be divided into three periods in terms of the Sun's particle emissivity.
openaire +1 more source
Solar energetic particle events from solar flares with weak impulsive phases of microwave emission
Solar Physics, 1993In some solar energetic particle events relatively intense proton fluxes are accompanied by disproportionately weak intensity ofμ-burst. A possible reason for such a situation is discussed in this paper. We use the idea that the dynamics of particles in flare loops strongly influences the efficiency of their escape into interplanetary space.
E. I. Daibog +2 more
openaire +1 more source
Survey and Comparison of Solar Activity and Energetic Particle Emission in 1970,
1977Abstract : Solar activity in 1970 was at a relatively high level with the number of major flares and important centers of activity reaching maximum numbers for all of cycle 20. Satellite data, primarily from Explorer 41, provided evidence for at least 152 distinct energetic particle enhancements during the year.
O. C. Mohler +2 more
openaire +1 more source
Acceleration of particles by an ensemble of shock waves and high energy emission of solar flares
AIP Conference Proceedings, 1992An analysis of observational data on X‐ and gamma‐emission and energetic particles from impulsive solar flares shows that particles are accelerated over a few seconds in a region where matter density ∼1011 cm−3 and magnetic field ≳300 G. We take the June 21 1980 flare as an example of an impulsive flare.
L. G. Kocharov, G. A. Kovaltsov
openaire +1 more source
Solar flare gamma-ray emission and energetic particles in space
AIP Conference Proceedings, 1996We expand Reames’ tabular summary of the two‐class picture of solar energetic particle (SEP) events to include characteristics of the particles that interact at the Sun to produce gamma‐ray emission. This addition underscores the contributions of gamma‐ray observations to our current understanding.
openaire +1 more source
Solar Energy, 2020
Abstract Solar thermal receivers collect and can store concentrated solar radiation using solid particles. Solid ceramic particles have shown to be a practical and efficient heat transfer media in solar-particle receivers, however, their emissivity and absorptivity at high temperatures are scarcely reported. This gap has led to large uncertainties in
Wanxia Zhao +2 more
openaire +1 more source
Abstract Solar thermal receivers collect and can store concentrated solar radiation using solid particles. Solid ceramic particles have shown to be a practical and efficient heat transfer media in solar-particle receivers, however, their emissivity and absorptivity at high temperatures are scarcely reported. This gap has led to large uncertainties in
Wanxia Zhao +2 more
openaire +1 more source
Particle Emission Associated with Solar Flares-—Model of Flare Events
1965We first discuss the plasma streams which move through interplanetary space with velocities of the order of 1000 to 1500 km/sec. These plasma clouds may appear to be responsible for those geomagnetic storms, which show a sudden commencement, the so-called sc geomagnetic storms.
openaire +1 more source
High-Energy Particle Production in Solar Flares (SEP, Gamma-Ray and Neutron Emissions)
Physica Scripta, 1987Electrons and ions, over a wide range of energies, are produced in association with solar flares. Solar energetic particles (SEPs), observed in space and near earth, consist of electrons and ions that range in energy from 10 keV to about 100 MeV and from 1 MeV to 20 GeV, respectively.
openaire +1 more source
Cosmic Research
The neutron radiation of the lunar surface under the influence of energetic charged particle flux from the intense Solar Proton Event (SPE) is considered. Numerical estimates of the neutron flux and the corresponding neutron component of the radiation dose are made for the historical Carrington SPE, which can be considered an example of the most ...
I. G. Mitrofanov +6 more
openaire +2 more sources
The neutron radiation of the lunar surface under the influence of energetic charged particle flux from the intense Solar Proton Event (SPE) is considered. Numerical estimates of the neutron flux and the corresponding neutron component of the radiation dose are made for the historical Carrington SPE, which can be considered an example of the most ...
I. G. Mitrofanov +6 more
openaire +2 more sources