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Type II Radio Emission and Solar Energetic Particle Events
AIP Conference Proceedings, 2008Type II radio bursts, solar energetic particle (SEP) events, and interplanetary (IP) shocks all have a common cause, viz., fast and wide (speed ⩾900 km/s and width ⩾60°)) coronal mass ejections (CMEs). Deviations from this general picture are observed as (i) lack of type II bursts during many fast and wide CMEs and IP shocks, (ii) slow CMEs associated ...
N Gopalswamy +2 more
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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, Daibog E I
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Particle-in-cell simulation of plasma emission in solar radio bursts
Astronomy & Astrophysics, 2021Aims. The present study aims to shed light on our understanding of the radiation processes of solar radio bursts associated with nonthermal electron propagation in the corona and interplanetary space. Methods. We performed 2.5-dimensional particle-in-cell (PIC) simulations to investigate the plasma emission excited by a relativistic electron beam using
T. M. Li, C. Li, P. F. Chen, W. J. Ding
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Energetic particle emission in two solar flares with open magnetic field
2022<p>Energetic particle populations in the solar corona and in the heliosphere appear to have different characteristics even when produced in the same solar flare. It is not clear what causes this difference: properties of the acceleration region, the large-scale magnetic field configuration in the flare, or particle transport effects, such
Philippa Browning, Mykola Gordovskyy
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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.
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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
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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
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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.
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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
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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
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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.
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