Effect of neutral particle density in the upper atmosphere on the generation of artificial magnetic pulsations in the Pc1 range

2010 ◽  
Vol 50 (5) ◽  
pp. 661-666 ◽  
Author(s):  
A. A. Mochalov ◽  
A. B. Pashin
Keyword(s):  
Neutral Particle ◽  
Particle Density ◽  
Upper Atmosphere ◽  
Magnetic Pulsations

scholarly journals Ionospheric Irregularities and High-multiple Reflections

1964 ◽  
Vol 17 (4) ◽  
pp. 480 ◽  
Author(s):  
GG Bowman
Keyword(s):  
Acoustic Waves ◽  
Neutral Particle ◽  
Particle Density ◽  
Sunspot Cycle ◽  
Diurnal Variations ◽  
Ionospheric Irregularities ◽  
Upper Atmosphere ◽  
Multiple Reflections ◽  
Annual Variations ◽  
Reflec Tions

The occurrence of high� multiple reflections (10 hops and more) from the F. layer of the ionosphere at night is considered. Sunspot-cycle, annual, and diurnal variations are presented. The sunspot. cycle and annual variations are similar to those for the upper-atmosphere neutral particle density. Periodicities in occurrence of around 60 min are found. Associations are found between high-multiple trace occurrence and sunset and sunrise times at the 90 km level. Ionospheric irregularities which are present at the time of high.multiple reflections indicate that these reflec� tions are probably not due to focusing effects. Evidence is presented to support a mechanism involving the reduction of non�deviative absorption to explain these reflections. This reduction may be caused by acoustic waves propagating in the high atmosphere.

Neutral particle density transients in gaseous discharges

1985 ◽  
Vol 28 (2) ◽  
pp. 571
Author(s):  
A. Metze ◽  
D. W. Ernie ◽  
H. J. Oskam ◽  
L. M. Chanin
Keyword(s):  
Neutral Particle ◽  
Particle Density

Influence of Atom-Atom Collisions on the Population Densities of Excited Atomic Levels

1970 ◽  
Vol 25 (1) ◽  
pp. 145-147 ◽  
Author(s):  
H. W. Drawin
Keyword(s):  
Thermal Plasma ◽  
Neutral Particle ◽  
Particle Density ◽  
Coupled System ◽  
Rate Equations ◽  
Gas Temperature ◽  
Hydrogen Atoms ◽  
Population Densities ◽  
Non Thermal Plasma ◽  
Quantitative Spectroscopy

Abstract The number densities of excited hydrogen atoms in a non-thermal plasma have been calculated on the basis of a coupled system of rate equations (25 levels) in which one accounts for electron-atom and atom-atom collisions. The calculated population densities depend strongly on the neutral particle density na when ne/na≪1. When the electron temperature, Te, is different from the gas temperature, Tg , the number densities of the excited levels are determined by Tg rather than by Te. This is important in connection with the quantitative spectroscopy of plasmas.

Measurement of the Neutral Particle Density in an Electron Cyclotron Resonance Plasma by Rayleigh Scattering

1995 ◽  
Vol 34 (Part 2, No. 10B) ◽  
pp. L1402-L1404 ◽  
Author(s):  
Wolfgang Cronrath ◽  
Hiroyuki Tanaka ◽  
Mark D. Bowden ◽  
Kiichiro Uchino ◽  
Katsunori Muraoka
Keyword(s):  
Cyclotron Resonance ◽  
Rayleigh Scattering ◽  
Neutral Particle ◽  
Electron Cyclotron Resonance ◽  
Particle Density ◽  
Electron Cyclotron ◽  
Electron Cyclotron Resonance Plasma ◽  
Resonance Plasma
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