Loss of van allen electrons due to whistlers

Dungey, J. W.

doi:10.1016/0032-0633(63)90166-1

Cited by 169 publications

(68 citation statements)

References 11 publications

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“…The significance of whistler waves from lightning in the precipitation of energetic electrons was first recognized by Dungey [1963]. Using incomplete data on wave characteristics, Roberts [1969] argued that precipitation by ducted whistlers led to inconsistent pitch angle distributions, energy spectra, and electron lifetimes.…”

Section: Interpretation Of L Dependencementioning

confidence: 99%

Lightning‐induced energetic electron flux enhancements in the drift loss cone

Blake¹,

Inan²,

Walt³

et al. 2001

J. Geophys. Res.

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Abstract. With its relatively low altitude (520 x 670 km) orbit, SAMPEX is mostly below the stable trapping region where charged particles repeatedly drift around the Earth, especially at midlatitudes. Recent analyses of SAMPEX data have revealed a surprisingly common set of observations of enhanced energetic (>150 keV) electron fluxes at L < 3, during times when SAMPEX was located such that any electrons that it observed were in the drift loss cone (and were thus destined to be precipitated upon reaching

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Section: Interpretation Of L Dependencementioning

confidence: 99%

Lightning‐induced energetic electron flux enhancements in the drift loss cone

Blake¹,

Inan²,

Walt³

et al. 2001

J. Geophys. Res.

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“…van Allen and Frank, 1959;Dungey, 1963), and yet their understanding is still limited. One of the most important processes that govern its dynamics is assumed to be the resonant wave-particle interaction.…”

Section: Introductionmentioning

confidence: 99%

“…It is thought to contribute to electron acceleration (up to ∼ MeV energies) and losses into the ionosphere (Lyons and Thorne, 1973), especially during geomagnetic disturbances (see Horne, 2002;Chen et al, 2007;Shprits et al, 2008b). Since increases in the energetic electron flux are hazardous to satellites (Baker, 2002), manned space missions, or can drastically affect atmospheric chemistry (Thorne, 1977), it is crucial to improve the existing numerical models that specify and predict the dynamics of radiation belts (Bourdarie et al, 1996;Li et al, 2001;Glauert and Horne, 2005;Summers et al, 2007;Fok et al, 2008;Mourenas et al, 2012). These models are based on the quasi-linear approach where resonant wave-particle interactions are described in terms of particle pitch angle and energy diffusion (Kennel and…”

Section: Introductionmentioning

confidence: 99%

Chorus wave-normal statistics in the Earth's radiation belts from ray tracing technique

et al. 2012

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Abstract. Discrete ELF/VLF (Extremely Low Frequency/Very Low Frequency) chorus emissions are one of the most intense electromagnetic plasma waves observed in radiation belts and in the outer terrestrial magnetosphere. These waves play a crucial role in the dynamics of radiation belts, and are responsible for the loss and the acceleration of energetic electrons. The objective of our study is to reconstruct the realistic distribution of chorus wave-normals in radiation belts for all magnetic latitudes. To achieve this aim, the data from the electric and magnetic field measurements onboard Cluster satellite are used to determine the wave-vector distribution of the chorus signal around the equator region. Then the propagation of such a wave packet is modeled using three-dimensional ray tracing technique, which employs K. Rönnmark's WHAMP to solve hot plasma dispersion relation along the wave packet trajectory. The observed chorus wave distributions close to waves source are first fitted to form the initial conditions which then propagate numerically through the inner magnetosphere in the frame of the WKB approximation. Ray tracing technique allows one to reconstruct wave packet properties (electric and magnetic fields, width of the wave packet in k-space, etc.) along the propagation path. The calculations show the spatial spreading of the signal energy due to propagation in the inhomogeneous and anisotropic magnetized plasma.Comparison of wave-normal distribution obtained from ray tracing technique with Cluster observations up to 40 • latitude demonstrates the reliability of our approach and applied numerical schemes.

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“…Dungey, 1963;. One area of uncertainty lies in providing a typical description of the precipitating fluxes.…”

Section: Introductionmentioning

confidence: 99%

Investigating radiation belt losses though numerical modelling of precipitating fluxes

2004

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Abstract. It has been suggested that whistler-induced electron precipitation (WEP) may be the most significant inner radiation belt loss process for some electron energy ranges. One area of uncertainty lies in identifying a typical estimate of the precipitating fluxes from the examples given in the literature to date. Here we aim to solve this difficulty through modelling satellite and ground-based observations of onset and decay of the precipitation and its effects in the ionosphere by examining WEP-produced Trimpi perturbations in subionospheric VLF transmissions. In this study we find that typical Trimpi are well described by the effects of WEP spectra derived from the AE-5 inner radiation belt model for typical precipitating energy fluxes. This confirms the validity of the radiation belt lifetimes determined in previous studies using these flux parameters. We find that the large variation in observed Trimpi perturbation size occurring over time scales of minutes to hours is primarily due to differing precipitation flux levels rather than changing WEP spectra. Finally, we show that high-time resolution measurements during the onset of Trimpi perturbations should provide a useful signature for discriminating WEP Trimpi from non-WEP Trimpi, due to the pulsed nature of the WEP arrival.

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Loss of van allen electrons due to whistlers

Cited by 169 publications

References 11 publications

Lightning‐induced energetic electron flux enhancements in the drift loss cone

Lightning‐induced energetic electron flux enhancements in the drift loss cone

Chorus wave-normal statistics in the Earth's radiation belts from ray tracing technique

Investigating radiation belt losses though numerical modelling of precipitating fluxes

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