Results 41 to 50 of about 412 (169)

Effect of plasma density on diffusion rates due to wave particle interactions with chorus and plasmaspheric hiss: extreme event analysis [PDF]

Annales Geophysicae, 2014
Wave particle interactions play an important role in controlling the dynamics of the radiation belts. The purpose of this study is to estimate how variations in the plasma density can affect diffusion rates resulting from interactions between chorus ...
A. Sicard-Piet, D. Boscher, R. B. Horne, N. P. Meredith, V. Maget   +4 more
doaj   +1 more source

Ensemble Modeling of Radiation Belt Electron Flux Decay Following a Geomagnetic Storm: Dependence on Key Input Parameters

Space Weather, 2022
We perform an ensemble of quasi‐linear diffusion simulations of the radiation belt electron flux decay for ∼6 days at L = 3.5 during the recovery phase of the storm on 7 November 2015, where plasmaspheric hiss dominantly drives the electron flux decay ...
Man Hua, Jacob Bortnik, Adam C. Kellerman, Enrico Camporeale, Qianli Ma   +4 more
doaj   +1 more source

Reconciling conflicting accounts of plasmaspheric hiss [PDF]

Eos, Transactions American Geophysical Union, 2012
Arcing from pole to pole, the Van Allen radiation belts are formed from a large number of protons or electrons trapped high above the Earth, the high‐energy particles locked in paths dictated by the terrestrial magnetic field. Separating the outer electron Van Allen belt from the inner belt is the so‐called slot region, a safe zone with reduced ...
openaire   +1 more source

Plasmaspheric hiss amplification mechanisms identified [PDF]

Eos, Transactions American Geophysical Union, 2012
Over the past 3 decades the hypothesis that chorus waves—a form of highintensity plasma wave often found in the outer magnetosphere—evolve into plasmaspheric hiss in the plasmasphere has grown in prominence. Plasmaspheric hiss is a form of low‐frequency radio wave that is often observed in the regions within the plasmasphere that have high plasma ...
openaire   +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

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

Slot region electron loss timescales due to plasmaspheric hiss and lightning-generated whistlers [PDF]

, 2007
Energetic electrons (E > 100 keV) in the Earth's radiation belts undergo Doppler-shifted cyclotron resonant interactions with a variety of whistler mode waves leading to pitch angle scattering and subsequent loss to the atmosphere.
Anderson, Roger R., Glauert, Sarah A., Meredith, Nigel P., Horne, Richard B.   +3 more
core   +1 more source

Plasmaspheric hiss properties: Observations from Polar [PDF]

Journal of Geophysical Research: Space Physics, 2015
AbstractIn the region between L = 2 to 7 at all Magnetic Local Time (MLTs) plasmaspheric hiss was detected 32% of the time. In the limited region of L = 3 to 6 and 15 to 21 MLT (dusk sector), the wave percentage detection was the highest (51%). The latter plasmaspheric hiss is most likely due to energetic ~10–100 keV electrons drifting into the dusk ...
Bruce T. Tsurutani, Barbara J. Falkowski, Jolene S. Pickett, Ondrej Santolik, Gurbax S. Lakhina   +4 more
openaire   +1 more source

Electron Scattering by Highly Oblique Quasi‐Electrostatic Chorus Waves Under Realistic Magnetospheric Conditions

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract Using Van Allen Probes data (2013–2015), we report that highly oblique chorus waves frequently occur in low‐density regions where fpe/fce≈3 ${f}_{\text{pe}}/{f}_{\text{ce}}\approx 3$. These waves exhibit an electric‐to‐magnetic energy ratio PE/c2PB>0.5 $\sqrt{{P}_{\mathrm{E}}/{c}^{2}{P}_{\mathrm{B}}} > 0.5$, much higher than the typical <0.1 ${
Lixian Yang, Si Liu, Zhonglei Gao, Wenya Li, Fuliang Xiao, Zhaoguo He, Xingran Chen, Yuyue Jin, Qian He, Zhoukun Deng, Jiawen Tang   +10 more
wiley   +1 more source

Modeling the Leakage of Hiss Waves From the Plasmasphere

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract Plasmaspheric hiss waves can cross the plasmasphere boundary layer (PBL) and leak into the plasmatrough, serving as the main source of exohiss waves. However, it remains unclear how the PBL and wave characteristics affect the leakage process of hiss waves. In this study, we conducted a detailed parametric ray tracing study to model the leakage
Xiangling Ding, Zhaoguo He, Jiang Yu, Jing Wang, Yuguang Ye, Qiugang Zong   +5 more
wiley   +1 more source