Results 141 to 150 of about 782 (172)

EMIC waves around the plasma-pause region

Planetary and Space Science, 2008
Abstract Electromagnetic ion-cyclotron (EMIC) instability has been studied using the general loss-cone distribution function by investigating the trajectories of charged particles and using the method of particle aspect analysis. A low β (ratio of plasma pressure to magnetic pressure) plasma consisting of resonant and non-resonant particles has ...
P Varma, G Ahirwar, M S Tiwari, Al [ Bortnik, J Bortnik, R M Thorne, O ' Brien, J C Strongeway, R J Shprits   +8 more
openaire   +2 more sources

Effects of EMIC Wave‐Driven Proton Precipitation on the Ionosphere

Journal of Geophysical Research: Space Physics, 2022
AbstractWe investigate the proton precipitation caused by electromagnetic ion cyclotron (EMIC) waves and its impact on the ionosphere with the self‐consistent ring current‐atmosphere interactions model (RAM‐SCBE) coupled with an ionospheric particle transport model Global Airglow (GLOW).
Xingbin Tian, Yiqun Yu, Minghui Zhu, Longxing Ma, Jinbin Cao, Shreedevi PR, Vania K. Jordanova, Stanley C. Solomon   +7 more
openaire   +1 more source

A statistical study of EMIC waves observed by Cluster: 1. Wave properties

2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS), 2014
Electromagnetic ion cyclotron (EMIC) waves are an important mechanism for particle energization and losses inside the magnetosphere. In order to better understand the effects of these waves on particle dynamics, detailed information about the ellipticity, normal angle, energy propagation angle distributions, and local plasma parameters are required ...
R. C. Allen, J.-C. Zhang, L. M. Kistler, H. E. Spence, R.-L. Lin, B. Klecker, M. W. Dunlop, M. André   +7 more
openaire   +1 more source

Analysis of Conjugate Satellite and Ground EMIC Wave Observations

2021 USNC-URSI Radio Science Meeting (USCN-URSI RSM), 2021
Electromagnetic ion cyclotron (EMIC) waves are transverse electromagnetic waves typically generated in the equatorial magnetosphere by anisotropic proton distributions. These waves can resonantly interact with multiple particle populations in the inner magnetosphere believed to be an important loss mechanism for both ring current ions and radiation ...
M. E. Usanova, L. W. Blum
openaire   +1 more source

Characteristics of Subpacket Structures in Ground EMIC Wave Observations

Journal of Geophysical Research: Space Physics, 2018
AbstractRecent studies using satellite observations have reported that subpacket structures play an important role in determining the characteristics of electromagnetic ion cyclotron (EMIC) rising/falling tone emissions. The purpose of the present study is to investigate the subpacket structure characteristics in the ground observations of the EMIC ...
Bharati Kakad, Yoshiharu Omura, Amar Kakad, Aditi Upadhyay, Ashwini K. Sinha   +4 more
openaire   +1 more source

Interaction of EMIC Waves With Thermal Plasma and Radiation Belt Particles

2006
Electromagnetic ion cyclotron (EMIC) waves are excited during the enhanced convective injection of plasmasheet ions into the inner magnetosphere. Waves grow rapidly near the magnetic equatorial plane reaching amplitudes up to 10 nT. Such intense waves induce scattering of cyclotron resonant ions at a rate comparable to the strong diffusion limit ...
Thorne, Richard M., Horne, Richard B., Jordanova, Vania K., Bortnik, Jacob, Glauert, Sarah   +4 more
openaire   +2 more sources

Ion Injection Triggered EMIC Waves in the Earth's Magnetosphere

Journal of Geophysical Research: Space Physics, 2018
AbstractWe present Van Allen Probe observations of electromagnetic ion cyclotron (EMIC) waves triggered solely due to individual substorm‐injected ions in the absence of storms or compressions of the magnetosphere during 9 August 2015. The time at which the injected ions are observed directly corresponds to the onset of EMIC waves at the location of ...
B. Remya, D. G. Sibeck, A. J. Halford, K. R. Murphy, G. D. Reeves, H. J. Singer, J. R. Wygant, G. Farinas Perez, S. A. Thaller   +8 more
openaire   +1 more source

Nonlinear Scattering of Relativistic Electrons by Oblique EMIC Waves

2023
Electrons in the Earth’s outer radiation belt can experience rapid energization and pitch angle scattering through interactions with naturally generated electromagnetic waves. Cyclotron resonant interactions with large amplitude electromagnetic ion cyclotron (EMIC) emissions cause scattering and major atmospheric losses of relativistic ...
Miroslav Hanzelka, Wen Li, Qianli Ma, Luisa Capannolo   +3 more
openaire   +1 more source

Compression-amplified EMIC waves and their effects on relativistic electrons

Physics of Plasmas, 2016
During enhancement of solar wind dynamic pressure, we observe the periodic emissions of electromagnetic ion cyclotron (EMIC) waves near the nightside geosynchronous orbit (6.6RE). In the hydrogen and helium bands, the different polarized EMIC waves have different influences on relativistic electrons (>0.8 MeV). The flux of relativistic electrons
L. Y. Li, J. Yu, J. B. Cao, Z. G. Yuan
openaire   +1 more source

Kinetic Effects of Cold Plasma on Magnetospheric EMIC Waves

2018
The Earth's magnetosphere is populated by particles coming from the Earth's ionosphere and the solar wind. The ionospheric component is often composed by cold (below tens of eV) ions, and it has been shown that these cold ions introduce a shorter length-scale into plasma processes like magnetic reconnection, owing to their smaller gyroradius than hot ...
Toledo-Redondo, Sergio, Lavraud, B., Fuselier, S. A., Le Contel, Olivier, Moore, T. E., Giles, B. L., Lindqvist, P. A., Russell, C. T.   +7 more
openaire   +1 more source