Impact of Significant Time‐Integrated Geomagnetic Activity on 2‐MeV Electron Flux

2019 ◽  
Vol 124 (6) ◽  
pp. 4445-4461 ◽  
Author(s):  
D. Mourenas ◽  
A. V. Artemyev ◽  
X.‐J. Zhang
Keyword(s):  
Geomagnetic Activity ◽  
Electron Flux ◽  
Significant Time

scholarly journals Specification of > 2 MeV electron flux as a function of local time and geomagnetic activity at geosynchronous orbit

Space Weather ◽  
2014 ◽  
Vol 12 (7) ◽  
pp. 470-486 ◽  
Author(s):  
Yi-Jiun Su ◽  
Jack M. Quinn ◽  
W. Robert Johnston ◽  
James P. McCollough ◽  
Michael J. Starks
Keyword(s):  
Local Time ◽  
Geomagnetic Activity ◽  
Electron Flux ◽  
Geosynchronous Orbit

Electron Flux Enhancements at L = 4.2 Observed by Global Positioning System Satellites: Relationship With Solar Wind and Geomagnetic Activity

2018 ◽  
Vol 123 (8) ◽  
pp. 6189-6206 ◽  
Author(s):  
Xiao-Jia Zhang ◽  
Didier Mourenas ◽  
Anton V. Artemyev ◽  
Vassilis Angelopoulos ◽  
Richard Mansergh Thorne
Keyword(s):  
Solar Wind ◽  
Geomagnetic Activity ◽  
Global Positioning System ◽  
Electron Flux ◽  
Positioning System ◽  
Global Positioning

scholarly journals Magnetic storm acceleration of radiation belt electrons observed by the Scintillating Fibre Detector (SFD) onboard EQUATOR-S

1999 ◽  
Vol 17 (12) ◽  
pp. 1622-1625 ◽  
Author(s):  
M. Cyamukungu ◽  
C. Lippens ◽  
L. Adams ◽  
R. Nickson ◽  
C. Boeder ◽  
...  
Keyword(s):  
Magnetic Storm ◽  
Geomagnetic Activity ◽  
Radiation Belt ◽  
Electron Flux ◽  
Energetic Electron ◽  
Energetic Particles ◽  
Radiation Belt Electrons ◽  
Instruments And Techniques ◽  
Storms And Substorms

Abstract. On the basis of the currents induced by electron fluxes in the Scintillating Fibre Detector (SFD) onboard the EQUATOR-S satellite launched on 2 December 1997, an in-situ acceleration of radiation belt electrons is found to possibly contribute to the increase of the flux of electrons with energies greater than 400 keV. The data acquired between 16 December 1997 and 30 April 1998 on the 500–67300 km, 4° inclination EQUATOR-S orbit show that the increase of the energetic electron flux corresponds to the enhanced geomagnetic activity measured through the Dst index.Key words. Magnetospheric physics (energetic particles · trapped; storms and substorms; instruments and techniques)

Electron-Channelling Patterns: Principles and Techniques

1976 ◽  
Vol 34 ◽  
pp. 400-401
Author(s):  
David C. Joy
Keyword(s):  
Crystal Structure ◽  
Electron Flux ◽  
Lattice Structure ◽  
Incident Beam ◽  
Bloch Wave ◽  
Crystalline Solid ◽  
Angle Of Incidence ◽  
Electron Channelling ◽  
Regular Arrangement ◽  
Backscattered Signals

In a crystalline solid the regular arrangement of the lattice structure influences the interaction of the incident beam with the specimen, leading to changes in both the transmitted and backscattered signals when the angle of incidence of the beam to the specimen is changed. For the simplest case the electron flux inside the specimen can be visualized as the sum of two, standing wave distributions of electrons (Fig. 1). Bloch wave 1 is concentrated mainly between the atom rows and so only interacts weakly with them. It is therefore transmitted well and backscattered weakly. Bloch wave 2 is concentrated on the line of atom centers and is therefore transmitted poorly and backscattered strongly. The ratio of the excitation of wave 1 to wave 2 varies with the angle between the incident beam and the crystal structure.

Anisotropy of damage productions in electron irradiated molybdenum

1978 ◽  
Vol 36 (1) ◽  
pp. 354-355
Author(s):  
K. Izui ◽  
S. Furuno ◽  
H. Otsu ◽  
T. Nishida ◽  
H. Maeta
Keyword(s):  
Electron Flux ◽  
Threshold Energy ◽  
High Energy ◽  
Voltage Electron ◽  
High Voltage Electron Microscope ◽  
Displacement Threshold ◽  
The Mean ◽  
Channeling Effect ◽  
Different Origins ◽  
Threshold Energies

Anisotropy of damage productions in crystals due to high energy electron bombardment are caused from two different origins. One is an anisotropic displacement threshold energy, and the other is an anisotropic distribution of electron flux near the atomic rows in crystals due to the electron channeling effect. By the n-beam dynamical calculations for germanium and molybdenum we have shown that electron flux at the atomic positions are from ∽4 to ∽7 times larger than the mean incident flux for the principal zone axis directions of incident 1 MeV electron beams, and concluded that such a locally increased electron flux results in an enhanced damage production. The present paper reports the experimental evidence for the enhanced damage production due to the locally increased electron flux and also the results of measurements of the displacement threshold energies for the <100>,<110> and <111> directions in molybdenum crystals by using a high voltage electron microscope.

ASSOCIATION BETWEEN VARIATIONS OF SOLAR WIND PARAMETERS AND GEOMAGNETIC ACTIVITY INDEX Ap IN 2003 - 2005

2011 ◽  
Vol 2 (3) ◽  
pp. 205-210 ◽  
Author(s):  
Igor Savel'evich Fal'kovich ◽  
M. R. Olyak ◽  
Nikolai Nikolaevich Kalinichenko ◽  
I. N. Bubnov
Keyword(s):  
Solar Wind ◽  
Geomagnetic Activity ◽  
Activity Index ◽  
Solar Wind Parameters ◽  
Geomagnetic Activity Index
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