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Electron precipitation in the auroral zone
Space Science Reviews, 1966The present experimental knowledge of electron precipitation in the auroral zone is summarized, using observations primarily from riometer, balloon, rocket and satellite studies. This includes the association of electron precipitation events with aurora, magnetic disturbances as well as temporal and spatial aspects of the particle bombardment.
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Electron Microscopy of Insulin Precipitates
Diabetes Care, 1982Morphologic characteristics of insulin precipitates were examined by both scanning and transmission electron microscopy. Insulin precipitate obtained after 1 wk of in vivo storage in an implanted dog reservoir was compared with insulin precipitate produced in vitro by isoelectric precipitation, acid-freeze-heat precipitation, and motion-induced ...
D S, Schade +5 more
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Outer-zone electron precipitation
Journal of Geophysical Research, 1971Measurements of energetic electrons (300 kev to 2.3 Mev) within the drift loss cone, of ELF emissions, and of the plasmapause location obtained with instruments aboard the polar satellite OV3-3 (1966-70A) are compared. A knee is found in the L-shell profile of the precipitated fluxes of outer-zone electrons, the flux decreasing toward lower latitudes ...
A. L. Vampola +2 more
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Precipitation of relativistic electrons
AIP Conference Proceedings, 2012Precipitation of relativistic electrons observed in Earth’s auroral zone occurs on the morning and evening local hours. The morning precipitation is impulsive with durations of about 0.25s (microbursts). The evening precipitation is relatively smooth with variations on minute time scales.
G. K. Parks +4 more
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Observations of low‐latitude electron precipitation
Journal of Geophysical Research: Space Physics, 1988Low‐latitude electron precipitation outside the well‐known region of the trapped Van Allen radiation belt has been known for some time, as has the occurrence of equatorial aurora. Observation by the Spacelab 1 electron spectrometer, working between 0.1 and 12.5 keV electron energy has revealed an unexpectedly high occurrence rate and flux intensity for
Lieu, R. +4 more
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Boundary‐oriented electron precipitation model
Journal of Geophysical Research: Space Physics, 2000A boundary‐oriented model of the global configuration of electrons precipitating into the polar ionosphere is presented. It provides the differential energy flux of precipitating electrons from 32 eV to 30 keV for five different activity levels. Data from 12 years and eight DMSP spacecraft were incorporated into the model.
Thomas Sotirelis, Patrick T. Newell
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Electron Microburst Precipitation in Earth’s Magnetosphere
2021 International Conference on Electromagnetics in Advanced Applications (ICEAA), 2021Intense bursts of precipitating electrons called "microbursts" were first detected in the 10-100 keV energy range using balloon-based instrumentation [ Anderson and Milton, 1964 ]. The balloon-borne detectors measure bremsstrahlung x-rays produced by energetic electrons that are scattered into Earth’s atmosphere from the Van Allen radiation belts ...
Robyn M. Millan +6 more
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Atmospheric ionization by precipitated electrons
Journal of Atmospheric and Terrestrial Physics, 1974Abstract A relatively simple procedure for the calculation of ionization production rate profiles due to precipitated electrons is described. It is used to show that the exospheric temperature can have an important effect on the production rates in the F-region and that the magnetic dip angle must be taken into account when calculating the profiles ...
Annemarie Wulff, J.A Gledhill
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Statistical study of precipitating electrons
Journal of Geophysical Research: Space Physics, 1982Energy spectra of precipitating electrons are fitted to the sum of three distributions: a power law, a Maxwellian, and a Gaussian. This fitting procedure determines seven parameters that characterize the essential features of each spectrum. These characteristic parameters are used to carry out various studies involving precipitating electrons.
E. G. Fontheim +5 more
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Bremsstrahlwung produced by precipitating electrons
Journal of Geophysical Research: Space Physics, 1979Theoretical values are presented of the bremsstrahlung flux escaping the atmosphere for various incident electron fluxes. The assumed incident electron fluxes were isotropic with exponential energy spectra. The escaping bremsstrahlung intensity, energy spectra, and angular distributions depend on the incident electron flux characteristics, indicating ...
M. Walt, L. L. Newkirk, W. E. Francis
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