Results 41 to 50 of about 303 (168)

Realistic Dispersion of Plasmaspheric Hiss in the Inner Magnetosphere and Its Effect on Wave-induced Electron Scattering Rates [PDF]

The Astrophysical Journal, 2021
Abstract The cold plasma approximation is a common treatment to study wave–particle interactions between plasmaspheric hiss and magnetospheric electrons, which, however, can become a challenge during periods of disturbed geomagnetic activity.
Xin Ma, Xing Cao, Binbin Ni, Qi Zhu, Zheng Xiang   +4 more
openaire   +1 more source

Temporal variability of quasi-linear pitch-angle diffusion

Frontiers in Astronomy and Space Sciences, 2022
Kinetic wave-particle interactions in Earth’s outer radiation belt energize and scatter high-energy electrons, playing an important role in the dynamic variation of the extent and intensity of the outer belt.
Clare E. J. Watt, Hayley J. Allison, Sarah N. Bentley, Rhys L. Thompson, I. Jonathan Rae, Oliver Allanson, Nigel P. Meredith, Johnathan P. J. Ross, Sarah A. Glauert, Richard B. Horne, Shuai Zhang, Kyle R. Murphy, Kyle R. Murphy, Dovilė Rasinskaitė, Shannon Killey   +14 more
doaj   +1 more source

Global model of plasmaspheric hiss from multiple satellite observations [PDF]

, 2018
We present a global model of plasmaspheric hiss, using data from eight satellites, extending the coverage and improving the statistics of existing models. We use geomagnetic activity dependent templates to separate plasmaspheric hiss from chorus.
Bortnick, Jacob, Li, W., Keith H. Yearby, Horne, R.B., Yearby, Keith, Kersten, Tobias, Wen Li, Meredith, Nigel P., Horne, Richard B., Li, Wen, Bortnik, Jacob, Sicard, Angélica, Nigel P. Meredith, Angélica Sicard, Jacob Bortnik, Tobias Kersten, Yearby, Keith H., Sicard, A., Kersten, T., Richard B. Horne, Bortnik, J., Yearby, K.H., Meredith, N.P.   +22 more
core   +1 more source

Simulation study on parametric dependence of whistler-mode hiss generation in the plasmasphere

Earth, Planets and Space, 2021
We conduct electromagnetic particle simulations to examine the applicability of nonlinear wave growth theory to the generation process of plasmaspheric hiss. We firstly vary the gradient of the background magnetic field from a realistic model to a rather
Yin Liu, Yoshiharu Omura, Mitsuru Hikishima   +2 more
doaj   +1 more source

Generation of unusually low frequency plasmaspheric hiss [PDF]

, 2014
It has been reported from Van Allen Probe observations that plasmaspheric hiss intensification in the outer plasmasphere, associated with a substorm injection on 30 September 2012, occurred with a peak frequency near 100 Hz, well below the typical ...
Spence, Harlan E., Fennell, Joseph F., G. B. Hospodarsky, Spence, H. E., Reeves, G. D., Wen Li, W. S. Kurth, Li, Wen, Bortnik, Jacob, Reeves, Geoffrey, Fennell, J. F., Richard B. Horne, C. A. Kletzing, J. F. Fennell, Hospodarsky, G. B., Blake, J. B., Lunjin Chen, Thorne, R. M., Richard M. Thorne, Thorne, Richard M., Horne, Richard B., G. D. Reeves, H. E. Spence, J. B. Blake, Kletzing, C. A., Jacob Bortnik, Chen, Lunjin, Kletzing, C A., Kurth, W. S., Bortnik, J.   +29 more
core   +1 more source

Enhanced Radiation Levels at Aviation Altitudes and Their Relationship to Plasma Waves in the Inner Magnetosphere

Space Weather, 2023
It is believed that galactic cosmic rays and solar energetic particles are the two major sources of ionizing radiation. However, the radiation source may also be due to relativistic electrons that are associated with precipitation from the Van Allen ...
Homayon Aryan, Jacob Bortnik, W. Kent Tobiska, Piyush Mehta, Rashmi Siddalingappa   +4 more
doaj   +1 more source

The distribution of plasmaspheric hiss wave power with respect to plasmapause location

Geophysical Research Letters, 2016
AbstractIn this work, Van Allen Probes data are used to derive terrestrial plasmaspheric hiss wave power distributions organized by (1) distance away from the plasmapause and (2) plasmapause distance from Earth. This approach is in contrast to the traditional organization of hiss wave power by L parameter and geomagnetic activity.
David M. Malaspina, Allison N. Jaynes, Cory Boulé, Jacob Bortnik, Scott A. Thaller, Robert E. Ergun, Craig A. Kletzing, John R. Wygant   +7 more
openaire   +2 more sources

Radial diffusion simulations of the 20 September 2007 radiation belt dropout [PDF]

Annales Geophysicae, 2014
This is a study of a dropout of radiation belt electrons, associated with an isolated solar wind density pulse on 20 September 2007, as seen by the solid-state telescopes (SST) detectors on THEMIS (Time History of Events and Macroscale Interactions ...
J. Albert
doaj   +1 more source

Observational evidence of the nonlinear wave growth theory of plasmaspheric hiss

Geophysical Research Letters, 2016
AbstractWe test the recently developed nonlinear wave growth theory of plasmaspheric hiss against discrete rising tone elements of hiss emissions observed by the Van Allen Probes. From the phase variation of the waveforms processed by bandpass filters, we calculate the instantaneous frequencies and wave amplitudes.
Satoko Nakamura, Yoshiharu Omura, Danny Summers, Craig A. Kletzing   +3 more
openaire   +1 more source

Low Frequency Plasmaspheric Hiss Wave Activity Parameterized by Plasmapause Location: Models and Simulations

Journal of Geophysical Research: Space Physics, 2022
Abstract Plasmaspheric hiss waves are a dominant source of scattering for keV‐MeV radiation belt electrons within the plasmasphere. Previous simulation and modeling work concerning hiss waves has often incorporated them via particle‐based parameterizations (e.g., L ‐shell ...
A. A. Saikin, A. Y. Drozdov, D. M. Malaspina   +2 more
openaire   +1 more source