A simulation approach of high-frequency electrostatic waves found in Saturn’s magnetosphere

2012 ◽  
Vol 19 (4) ◽  
pp. 042102 ◽  
Author(s):  
Etienne J. Koen ◽  
Andrew B. Collier ◽  
Shimul K. Maharaj
Keyword(s):  
High Frequency ◽  
Simulation Approach ◽  
Electrostatic Waves

Coupled Langmuir and nonlinear ion acoustic waves in the presence of non-thermal electrons

2009 ◽  
Vol 75 (2) ◽  
pp. 193-202 ◽  
Author(s):  
H. ALINEJAD ◽  
P. A. ROBINSON ◽  
O. SKJAERAASEN ◽  
I. H. CAIRNS
Keyword(s):  
Mach Number ◽  
Acoustic Waves ◽  
High Frequency ◽  
Strong Field ◽  
Low Frequency ◽  
Thermal Electron ◽  
Electrostatic Waves ◽  
Envelope Solitons ◽  
Langmuir Soliton ◽  
Langmuir Solitons

AbstractA new set of equations describing the coupling of high-frequency electrostatic waves with ion fluctuations is obtained taking into account a non-thermal electron distribution. It is shown that there exist stationary envelope solitons which have qualitatively different structures from the solutions reported earlier. In particular, the Langmuir field envelopes are found with similar width and strong field intensities in comparison to the isothermal case. It is also shown that the presence of the fast or non-thermal electrons significantly modifies the nature of Langmuir solitons in the transition from a single-hump solution to a double-hump solution as the Mach number increases to unity. The low-frequency electrostatic potential associated with the high-frequency Langmuir field has the usual single-dip symmetric structure whose amplitude increases with increasing Mach number. Furthermore, the dip at the center of the double-hump Langmuir soliton is found to become smaller as the proportion of non-thermal electrons increases.

High-frequency ion electrostatic instabilities in mixed warm–cold plasma

1976 ◽  
Vol 15 (3) ◽  
pp. 325-333 ◽  
Author(s):  
L. Gomberoff ◽  
S. Cuperman
Keyword(s):  
Distribution Function ◽  
High Frequency ◽  
Cold Plasma ◽  
Loss Cone ◽  
Electrostatic Waves ◽  
High Frequencies ◽  
Proton Gyrofrequency

It is shown that an ion loss cone distribution function with m ≥ 1 becomes unstable against electrostatic waves with ω ≫ Ωp and k0 = 0 in the presence of a cold plasma population, in contrast with pure warm systems, which require m ≥ 3 for instability. This result is an extension to high frequencies, ω ≫ Ω of similar conclusions reached by Pearlstein et al. (1966) and Farr & Budwine (1968), for ω-values equal to the first few harmonics of the proton gyrofrequency.

Electron-acoustic waves in the laboratory: an experiment revisited

2000 ◽  
Vol 64 (4) ◽  
pp. 433-443 ◽  
Author(s):  
M. A. HELLBERG ◽  
R. L. MACE ◽  
R. J. ARMSTRONG ◽  
G. KARLSTAD
Keyword(s):  
Distribution Function ◽  
Acoustic Wave ◽  
Acoustic Waves ◽  
High Frequency ◽  
Hot Electron ◽  
Electron Component ◽  
Temperature Plasma ◽  
Electrostatic Waves ◽  
Electron Acoustic Wave ◽  
Electron Acoustic

High-frequency electrostatic waves have been observed in a two-electron-temperature plasma. Both bi-Maxwellian and Maxwellian-waterbag models were found to be inadequate in explaining the observed dispersion and damping rates. However, modelling of the hot electron component with a κ-distribution function confirms that the experiments represent observation of the electron-acoustic wave in the laboratory.

High-frequency electrostatic waves near Earth's bow shock

1989 ◽  
Vol 94 (A10) ◽  
pp. 13397 ◽  
Author(s):  
T. G. Onsager ◽  
R. H. Holzworth ◽  
H. C. Koons ◽  
O. H. Bauer ◽  
D. A. Gurnett ◽  
...  
Keyword(s):  
High Frequency ◽  
Bow Shock ◽  
Electrostatic Waves ◽  
Earth’S Bow Shock

Plasma maser theory of high-frequency electrostatic waves in the presence of a coherent whistler mode

1985 ◽  
Vol 31 (6) ◽  
pp. 3783-3790 ◽  
Author(s):  
S. Bujarbarua ◽  
S. N. Sarma ◽  
M. Nambu ◽  
H. Fujiyama
Keyword(s):  
High Frequency ◽  
Whistler Mode ◽  
Electrostatic Waves

High-frequency electrostatic waves in the magnetosphere

1973 ◽  
Vol 78 (7) ◽  
pp. 1082-1099 ◽  
Author(s):  
T. S. T. Young ◽  
J. D. Callen ◽  
J. E. McCune
Keyword(s):  
High Frequency ◽  
Electrostatic Waves

Drift instabilities in anti-loss-cone plasmas

1976 ◽  
Vol 15 (1) ◽  
pp. 105-113 ◽  
Author(s):  
B. Buti
Keyword(s):  
Growth Rates ◽  
High Frequency ◽  
Low Frequency ◽  
Frequency Instability ◽  
Loss Cone ◽  
Electrostatic Waves ◽  
Low Frequency Instability ◽  
The Stability

The paper investigates the stability of electrostatic waves in non-uniform magnetoplasmas, governed by anti-loss-cone distributions. A new high- frequency anti-loss-cone instability occurs if ρ > ρc. (ρ is the parameter charactensing the strength of the anti-loss-cone.) An increase in ρ increases the growth rates for this instability, but stabilizes the low-frequency instability that exists even in the absence of the anti-loss cone. The growth rates can be of order 0.1Ωe.

High-frequency electrostatic waves in an inhomogeneous magnetized plasma

1976 ◽  
Vol 34 (1) ◽  
pp. 17-33
Author(s):  
K. M. Srivastava ◽  
K. Gemawat
Keyword(s):  
High Frequency ◽  
Magnetized Plasma ◽  
Electrostatic Waves
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