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2020

Experimental Determination of the Conditions Associated With “Zebra Stripe” Pattern Generation in the Earth s Inner Radiation Belt and Slot Region

The “zebra stripes” are peaks and valleys commonly present in the spectrograms of energetic particles trapped in the Earth s inner belt and slot region. Several theories have been proposed over the years to explain their generation, structure, and evolution. Yet, the plausibility of various theories has not been tested due to a historical lack of ground truth, including in situ electric field measurements. In this work, we leverage the new visibility offered by the database of Van Allen Probes electric drift measurements ...

Lejosne, Solène; Mozer, Forrest;

YEAR: 2020     DOI: https://doi.org/10.1029/2020JA027889

zebra stripes; superposed epoch analysis; prompt penetration electric fields; Inner radiation belt; substorm; Van Allen Probes

2016

Structure and Evolution of Electron "Zebra Stripes" in the Inner Radiation Belt

Zebra stripes\textquotedblright are newly found energetic electron energy-spatial (L shell) distributed structure with an energy between tens to a few hundreds keV in the inner radiation belt. Using high-quality measurements of electron fluxes from Radiation Belt Storm Probes Ion Composition Experiment (RBSPICE) on board the twin Van Allen Probes, we carry out case and statistical studies from April 2013 to April 2014 to study the structural and evolutionary characteristics of zebra stripes below L = 3. It is revealed that t ...

Liu, Y.; Zong, Q.-G.; Zhou, X.-Z.; Foster, J.; Rankin, R.;

YEAR: 2016     DOI: 10.1002/2015JA022077

electric field; energetic electrons; particle dynamic; Radiation belt; Van Allen Probes; zebra stripes

The \textquotedblleftzebra stripes\textquotedblright: An effect of F-region zonal plasma drifts on the longitudinal distribution of radiation belt particles

We examine a characteristic effect, namely, the ubiquitous appearance of structured peaks and valleys called zebra stripes in the spectrograms of energetic electrons and ions trapped in the inner belt below L ~ 3. We propose an explanation of this phenomenon as a purely kinematic consequence of particle drift velocity modulation caused by F region zonal plasma drifts in the ionosphere. In other words, we amend the traditional assumption that the electric field associated with ionospheric plasma drives trapped particle distri ...

Lejosne, Solène; Roederer, Juan;

YEAR: 2016     DOI: 10.1002/2015JA021925

electric field; Ionosphere; Inner radiation belt; Van Allen Probes; zebra stripes



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