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Updated: Jun 21, 2026

Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
New features of electron phase space holes observed by the THEMIS mission
L Andersson1, R E Ergun, J Tao
1Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, Colorado 80309, USA.
Abstract:
Observations of electron phase-space holes (EHs) in Earth's plasma sheet by the THEMIS satellites include the first detection of a magnetic perturbation (deltaB_{ parallel}) parallel to the ambient magnetic field (B0). EHs with a detectable deltaB_{ parallel} have several distinguishing features including large electric field amplitudes, a magnetic perturbation perpendicular to B0, high speeds ( approximately 0.3c) along B0, and sizes along B0 of tens of Debye lengths. These EHs have a significant center potential (Phi approximately k_{B}T_{e}/e), suggesting strongly nonlinear behavior nearby such as double layers or magnetic reconnection.
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