ELECTRONIC RECOMBINATION IN AN ANISOTROPIC CLASSICAL MAXWELLIAN PLASMA

1988 ◽  
Vol 49 (C7) ◽  
pp. C7-291-C7-296
Author(s):  
J. VOGEL ◽  
C. TOEPFFER
Keyword(s):  
Maxwellian Plasma

Intensity Distribution of Emission from a Maxwellian Plasma

1969 ◽  
Vol 26 (3) ◽  
pp. 875-875
Author(s):  
Noboru Shimomura ◽  
Kenji Mitani
Keyword(s):  
Intensity Distribution ◽  
Maxwellian Plasma

Averaged collision strength of Carbon Π ion of Druyvesteyn distribution in plasma

2018 ◽  
Vol 32 (26) ◽  
pp. 1850316 ◽  
Author(s):  
Jian He ◽  
Qingguo Zhang
Keyword(s):  
Space Plasma ◽  
Maxwellian Distribution ◽  
Collision Strength ◽  
Maxwellian Plasma ◽  
Increasing Temperature

Non-Maxwellian distribution has been found in laboratory and space plasma in recent years. In this paper, averaged collision strengths of Carbon [Formula: see text] ion 133.53 nm are calculated for Druyvesteyn distribution for the non-Maxwellian distribution, when temperatures vary from 10[Formula: see text] K to 10[Formula: see text] K. Results indicate that significant differences between the averaged collision strengths occur for the Druyvesteyn distribution and the Maxwellian distribution, furthermore, for the Maxwellian distribution and the Druyvesteyn distribution with any characterizing parameter x, the averaged collision strengths increase with increasing temperature, and the averaged collision strengths are close to those of the Maxwellian distribution when the characterizing parameter x is close to [Formula: see text]. This calculation is significant for non-Maxwellian plasma.

Heat flux in a non-Maxwellian plasma

1989 ◽  
Vol 40 (2) ◽  
pp. 981-986 ◽  
Author(s):  
N. N. Ljepojevic ◽  
P. MacNeice
Keyword(s):  
Heat Flux ◽  
Maxwellian Plasma

Ion-cyclotron modes in weakly relativistic plasmas

1994 ◽  
Vol 51 (3) ◽  
pp. 371-379 ◽  
Author(s):  
Chandu Venugopal ◽  
P. J. Kurian ◽  
G. Renuka
Keyword(s):  
Dispersion Relation ◽  
High Frequency ◽  
Low Frequency ◽  
Dispersion Relations ◽  
The Other ◽  
Larmor Radius ◽  
Relativistic Plasmas ◽  
Ion Plasma ◽  
Maxwellian Plasma ◽  
Relativistic Dispersion

We derive a dispersion relation for the perpendicular propagation of ioncyclotron waves around the ion gyrofrequency ω+ in a weaklu relaticistic anisotropic Maxwellian plasma. These waves, with wavelength greater than the ion Larmor radius rL+ (k⊥ rL+ < 1), propagate in a plasma characterized by large ion plasma frequencies (). Using an ordering parameter ε, we separated out two dispersion relations, one of which is independent of the relativistic terms, while the other depends sensitively on them. The solutions of the former dispersion relation yield two modes: a low-frequency (LF) mode with a frequency ω < ω+ and a high-frequency (HF) mode with ω > ω+. The plasma is stable to the propagation of these modes. The latter dispersion relation yields a new LF mode in addition to the modes supported by the non-relativistic dispersion relation. The two LF modes can coalesce to make the plasma unstable. These results are also verified numerically using a standard root solver.

Electron density and temperature measurements in the lower ionosphere as deduced from the warm plasma theory of the h.f. quadrupole probe

1972 ◽  
Vol 8 (2) ◽  
pp. 231-253 ◽  
Author(s):  
J. M. Chasseriaux ◽  
R. Debrie ◽  
C. Renard
Keyword(s):  
Magnetic Field ◽  
Numerical Integration ◽  
Electron Density ◽  
Lower Ionosphere ◽  
Great Difficulty ◽  
Maxwellian Plasma ◽  
Warm Plasma ◽  
Plasma Theory ◽  
Electron Density And Temperature ◽  
The Magnetic Field

The frequency response of the h.f. quadrupole probe is calculated to be used as a diagnostic tool for measurements of electron density and temperature. In §2 the magnetic field is assumed to be zero, and ion motions are neglected. For a Maxwellian plasma, the so-called ‘Landau wave approximation’ is compared with various more sophisticated treatments, such as numerical integration or super-Cauchy and multiple water-bag models. The range of validity of this approximation is shown to be large, and the results can be applied to the most interesting parts of the experimental observations. All results previously established are recovered with greater speed. Having studied various disturbances (collisions, inhomogeneity and relative motion of the probe with respect to the plasma), it is deduced that the best way to determine the electron temperature is to use the anti-resonances due to beating between the Landau wave and the cold plasma field. In § 3 we describe the quadrupole probe, launched in December 1971 as part of the CISASPE rocket experiment. To deduce the electron density and temperature from these measurements, it is necessary to consider the influence of a static magnetic field, such as the earth's magnetic field. The general case could be treated by numerical integration, though with great difficulty, but it is shown that in most ionospheric conditions, in the vicinity of the upper hybrid frequency ωT the above treatment is again possible, the plasma frequency simply being replaced by ωT, and the thermal velocity slightly modified. These assumptions are used to deduce the electron density and temperature profiles.

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