Earth's magnetotail as the reservoir of accelerated single‐ and multicharged oxygen ions replenishing radiation belts

2021 ◽  
Author(s):  
M. I. Panasyuk ◽  
E. I. Zhukova ◽  
V. V. Kalegaev ◽  
H. V. Malova ◽  
V.Yu. Popov ◽  
...  
Keyword(s):  
Radiation Belts ◽  
Oxygen Ions

scholarly journals A source of very energetic oxygen located in Jupiter’s inner radiation belts

2022 ◽  
Vol 8 (2) ◽  
Author(s):  
Elias Roussos ◽  
Christina Cohen ◽  
Peter Kollmann ◽  
Marco Pinto ◽  
Norbert Krupp ◽  
...  
Keyword(s):  
Charged Particle ◽  
Cosmic Ray ◽  
Radiation Belts ◽  
Particle Source ◽  
Oxygen Ions

A local charged particle source in Jupiter’s inner radiation belts generates oxygen ions of cosmic ray energies.

scholarly journals Invariants of the Spatial-Energy Structure and Modeling of the Earth's Ion Radiation Belts

2019 ◽  
Author(s):  
Alexander S. Kovtyukh
Keyword(s):  
Radiation Belts ◽  
Ion Fluxes ◽  
Energy Structure ◽  
Energy Distributions ◽  
Oxygen Ions ◽  
Space Flights ◽  
Physical Mechanisms ◽  
Proton Fluxes ◽  
White Spots ◽  
First Time

Abstract. The spatial-energy distributions of proton fluxes in the Earth's radiation belts (ERB) are well studied and the NASA averaged empirical models constructed for them (the latest versions are AP8 and AP9). These models are widely used in space research. However, for heavier ERB ions (helium, oxygen, etc.), much less measurements were made on satellites, especially in the energy range from tens to hundreds of MeV, and there are no sufficiently complete and reliable models for them. Meanwhile, such ions, although there are much smaller than protons, play a very important role in the physics of ERB, especially in their dynamics, as well as in solving problems of ensuring the safety of space flights. The data on such ions represent a rather fragmentary picture, in which there are significant white spots. Using the methods considered in this paper, these fragmentary data can be streamlined, linked to each other and get a regular picture that has a simple physical meaning. Spatial-energy distributions of the stationary fluxes of protons, helium ions and ions of the CNO group with energy from 100 keV to 200 MeV at L ~ 1–8 considered here on the data of the satellites for 1961–2017. It is found, that results of the measurements of the ion fluxes are arrange in certain regular patterns in the spaces {E, L} and {L, B/B0}. This effect connected with the existence of invariant parameters of these distributions of ion fluxes. These invariant parameters are very useful and necessary for constructing the ion models of the ERB. The physical mechanisms leading to formation spatial-energy structure of the ERB ion fluxes and the values of its invariant parameters discussed here. In the course of this work, solar-cyclic (11-year) variations in the distributions of helium and carbon-nitrogen-oxygen ions fluxes in the ERB studied for the first time. It shown that, as compared with such variations in the proton fluxes studied earlier, the amplitude of the variations of heavier ions is much larger and increases with increasing their mass.

scholarly journals Earth’s magnetotail as the reservoir of accelerated single- and multicharged oxygen ions replenishing radiation belts

2020 ◽  
Author(s):  
Elena Parkhomenko ◽  
Vladimir Kalegaev ◽  
Helmi Malova ◽  
Mikhail Panasyuk ◽  
Victor Popov ◽  
...  
Keyword(s):  
Numerical Model ◽  
Time Scale ◽  
Large Scale ◽  
Radiation Belt ◽  
Ring Current ◽  
Outer Region ◽  
Radiation Belts ◽  
Proton Radiation ◽  
Oxygen Ions ◽  
Oxygen Ion

<p>In this work we are studying multicharged oxygen ion acceleration during substorms in the Earth's magnetotail as the source of ring current replenishment by energetic ion population. We used measurements obtained by the CRRES spacecraft for the comparison of experimental spectra of oxygen charge state in the outer region of the ring current and proton radiation belt with model results. We present a numerical model that allows to evaluate acceleration of oxygen ions O+-O+8 in the course of two possible perturbation processes: A) passage of multiple dipolarization fronts in the magnetotail; B) passage of fronts followed by electromagnetic turbulence. It is shown that acceleration processes depend on particle charges and time scale of electric field variations. Oxygen ions O+8 with average initial energies 12 keV are accelerated efficiently during multiple dipolarization processes of type (A) and their energies increased up to 7.4 MeV, whereas ions O+1 with the same energies were energized up to 1.9 МeV. It is shown that oxygen ions O+-O+2 are able to penetrate into the ring/radiation belts region with L between L=4.5 and L=7.5 in the process of plasma transfer on dipolarization fronts. For oxygen O+-O+8 the additional acceleration mechanism is required, such as large-scale electromagnetic turbulence, when the ions can get energies comparable with experimentally observed ones in the indicated range of L shell values. It is shown that the taking into account electromagnetic fluctuations, accompanying magnetic dipolarization, may explain the appearance of oxygen ion flows with energies greater than 3MeV in the near- Earth’s space.</p>

The influence of various frequency chorus waves on electron dynamics in radiation belts

2020 ◽  
Vol 64 (4) ◽  
pp. 890-897
Author(s):  
JiaBei He ◽  
YuYue Jin ◽  
FuLiang Xiao ◽  
ZhaoGuo He ◽  
Chang Yang ◽  
...  
Keyword(s):  
Radiation Belts ◽  
Electron Dynamics ◽  
Chorus Waves

Structural, electrical characterization and oxygen-diffusion paths in LaSrGa1-xMgxO4-δ (x=0.0-0.2) layered perovskites: an impedance spectroscopy and neutron diffraction study

2021 ◽  
Author(s):  
Carlos Marino ◽  
Juan Basbus ◽  
Ana L. Larralde ◽  
Jose Antonio Alonso ◽  
Maria Teresa Fernandez-Diaz ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Neutron Diffraction ◽  
Structural Characterization ◽  
Oxygen Diffusion ◽  
Electrical Characterization ◽  
Neutron Diffraction Study ◽  
Oxygen Ions ◽  
Diffusion Paths ◽  
Layered Perovskites

This work presents the results of the structural characterization of LaSrGa1-xMgxO4-δ oxides with x=0.0-0.2 (LSGM'); these oxides with layered K2NiF4-type structure are potential electrolytes of oxygen ions with applications in...

scholarly journals Structure and transport properties of triple-conducting BaxSr1−xTi1−yFeyO3−δ oxides

RSC Advances ◽  
2021 ◽  
Vol 11 (32) ◽  
pp. 19570-19578
Author(s):  
T. Miruszewski ◽  
K. Dzierzgowski ◽  
P. Winiarz ◽  
D. Jaworski ◽  
K. Wiciak-Pawłowska ◽  
...  
Keyword(s):  
Transport Properties ◽  
Charge Carriers ◽  
Conducting Oxides ◽  
Oxygen Ions ◽  
Perovskite Materials

BaxSr1−xTi1−yFeyO3−δ-based perovskite materials with different barium and iron contents are reported as triple conducting oxides (TCOs), which may conduct three charge carriers: oxygen ions, protons and electrons/holes.

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