scholarly journals Dawn/Dusk Asymmetry of the Martian UltraViolet Terminator Observed Through Suprathermal Electron Depletions

2019 ◽  
Vol 124 (8) ◽  
pp. 7283-7300 ◽  
Author(s):  
M. Steckiewicz ◽  
P. Garnier ◽  
R. Lillis ◽  
D. Toublanc ◽  
F. Leblanc ◽  
...  
Keyword(s):  
Suprathermal Electron

scholarly journals Some Anomalies in the Raman spectrum from laser-produced plasmas

1988 ◽  
Vol 6 (2) ◽  
pp. 287-294
Author(s):  
T. J. M. Boyd ◽  
G. A. Gardner ◽  
G. A. Coutts
Keyword(s):  
Raman Spectrum ◽  
Light Wave ◽  
Scattered Light ◽  
Thomson Scattering ◽  
Hot Electron ◽  
Conventional Theory ◽  
Suprathermal Electron ◽  
Suprathermal Electrons ◽  
Scattered Spectrum

Many experiments show features of the Raman spectrum at variance with the predictions of conventional theory. One persistent discrepancy, the cut-off in the spectrum of scattered light at about 1·5λ0, led Simon and Short to postulate that the scattered spectrum is not Raman light as such, but derives from enhanced Thomson scattering from plasmas in which a population of suprathermal electrons is present. We describe a set of simulations which model the propagation of a light wave through a plasma characterized by two electron temperatures with the hot electron fraction varying between 0 and 0·05. The results show that enhanced Thomson scattering will contribute to the spectra observed in some experiments at least and confirm the contention that the spectrum of the scattered light is not especially sensitive to the width of the suprathermal electron feature. We have also examined the effect of a finite quiver velocity on the enhanced Thomson spectrum as a function of the population of suprathermal electrons, in particular its effect on the wavelength bands.

scholarly journals Tests for coronal electron temperature signatures in suprathermal electron populations at 1 AU

2017 ◽  
Vol 35 (6) ◽  
pp. 1275-1291 ◽  
Author(s):  
Allan R. Macneil ◽  
Christopher J. Owen ◽  
Robert T. Wicks
Keyword(s):  
Solar Wind ◽  
Electron Temperature ◽  
Energy Content ◽  
The Sun ◽  
Particle Interactions ◽  
Core Electron ◽  
Suprathermal Electron ◽  
Electron Distributions ◽  
The Relationship ◽  
Coronal Electron

Abstract. The development of knowledge of how the coronal origin of the solar wind affects its in situ properties is one of the keys to understanding the relationship between the Sun and the heliosphere. In this paper, we analyse ACE/SWICS and WIND/3DP data spanning  > 12 years, and test properties of solar wind suprathermal electron distributions for the presence of signatures of the coronal temperature at their origin which may remain at 1 AU. In particular we re-examine a previous suggestion that these properties correlate with the oxygen charge state ratio O7+ ∕ O6+, an established proxy for coronal electron temperature. We find only a very weak but variable correlation between measures of suprathermal electron energy content and O7+ ∕ O6+. The weak nature of the correlation leads us to conclude, in contrast to earlier results, that an initial relationship with core electron temperature has the possibility to exist in the corona, but that in most cases no strong signatures remain in the suprathermal electron distributions at 1 AU. It cannot yet be confirmed whether this is due to the effects of coronal conditions on the establishment of this relationship or due to the altering of the electron distributions by processing during transport in the solar wind en route to 1 AU. Contrasting results for the halo and strahl population favours the latter interpretation. Confirmation of this will be possible using Solar Orbiter data (cruise and nominal mission phase) to test whether the weakness of the relationship persists over a range of heliocentric distances. If the correlation is found to strengthen when closer to the Sun, then this would indicate an initial relationship which is being degraded, perhaps by wave–particle interactions, en route to the observer.

scholarly journals Observations of suprathermal electron conies in an interplanetary coronal mass ejection

1999 ◽  
Vol 26 (16) ◽  
pp. 2613-2616 ◽  
Author(s):  
W. C. Feldman ◽  
R. M. Skoug ◽  
J. T. Gosling ◽  
D. J. McComas ◽  
R. L. Tokar ◽  
...  
Keyword(s):  
Coronal Mass Ejection ◽  
Suprathermal Electron ◽  
Interplanetary Coronal Mass Ejection ◽  
Mass Ejection

scholarly journals The CASSIOPE/e-POP Suprathermal Electron Imager (SEI)

2015 ◽  
Vol 189 (1-4) ◽  
pp. 65-78 ◽  
Author(s):  
D. J. Knudsen ◽  
J. K. Burchill ◽  
T. G. Cameron ◽  
G. A. Enno ◽  
A. Howarth ◽  
...  
Keyword(s):  
Suprathermal Electron

The diagnostics of suprathermal electron spectrum by barium clouds injection

1993 ◽  
Vol 13 (10) ◽  
pp. 35-44
Author(s):  
V.N. Oraevsky ◽  
Yu.Ya. Ruzhin ◽  
V.V. Vas'kov ◽  
Ya.S. Dimant
Keyword(s):  
Electron Spectrum ◽  
Suprathermal Electron
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