Features of the Mechanism of Formation of the Radiation Belt of High-Energy Electrons and Positrons

2018 ◽  
Vol 81 (4) ◽  
pp. 520-525 ◽  
Author(s):  
Yu. V. Mikhailovа ◽  
A. M. Galper ◽  
V. V. Mikhailov
Keyword(s):  
Radiation Belt ◽  
High Energy ◽  
Mechanism Of Formation ◽  
High Energy Electrons ◽  
Electrons And Positrons

scholarly journals Properties of Elementary Particle Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station

2019 ◽  
Vol 209 ◽  
pp. 01007
Author(s):  
Francesco Nozzoli
Keyword(s):  
Electron Flux ◽  
Space Station ◽  
Cosmic Ray ◽  
High Energy ◽  
Precision Measurements ◽  
High Energy Electrons ◽  
Electrons And Positrons ◽  
Positron Flux ◽  
Rigidity Dependence ◽  
Alpha Magnetic Spectrometer

Precision measurements by AMS of the fluxes of cosmic ray positrons, electrons, antiprotons, protons as well as their rations reveal several unexpected and intriguing features. The presented measurements extend the energy range of the previous observations with much increased precision. The new results show that the behavior of positron flux at around 300 GeV is consistent with a new source that produce equal amount of high energy electrons and positrons. In addition, in the absolute rigidity range 60–500 GV, the antiproton, proton, and positron fluxes are found to have nearly identical rigidity dependence and the electron flux exhibits different rigidity dependence.

Generation of two-band chorus waves in the Earth's outer radiation belt

2021 ◽  
Author(s):  
Jinxing Li ◽  
Jacob Bortnik ◽  
Xin An ◽  
Wen Li ◽  
Vassilis Angelopoulos ◽  
...  
Keyword(s):  
Electromagnetic Waves ◽  
Radiation Belt ◽  
High Energy ◽  
Outer Radiation Belt ◽  
Naturally Occurring ◽  
Chorus Waves ◽  
High Energy Electrons ◽  
Distinct Frequency ◽  
Space Environments ◽  
Energy Components

<p>Naturally occurring chorus emissions are a class of electromagnetic waves found in the space environments of the Earth and other magnetized planets. They play an essential role in accelerating high-energy electrons forming the hazardous radiation belt environment. Chorus typically occurs in two distinct frequency bands separated by a gap. The origin of this two-band structure remains a 50-year old question. Using measurements from NASA’s Van Allen Probes we report that banded chorus waves are commonly accompanied by two separate anisotropic electron components. We demonstrate, using numerical simulations, that the initially excited single-band chorus waves alter the electron distribution immediately via Landau resonance, and suppresses the electron anisotropy at medium energies. This naturally divides the electron anisotropy into a low and a high energy components which excite the upper-band and lower-band chorus waves, respectively. This mechanism may also apply to the generation of chorus waves in other magnetized planetary magnetospheres.</p>

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