High-Frequency Electrostatic Plasma Instability Inherent to ``Loss-Cone'' Particle Distributions

1965 ◽  
Vol 8 (3) ◽  
pp. 547 ◽  
Author(s):  
M. N. Rosenbluth ◽  
R. F. Post
Keyword(s):  
High Frequency ◽  
Plasma Instability ◽  
Loss Cone ◽  
Particle Distributions

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.

Stabilization of Drift-Cyclotron Loss-Cone Instability of Plasmas by High Frequency Field

1981 ◽  
Vol 50 (5) ◽  
pp. 1716-1722 ◽  
Author(s):  
Mutsuo Takai ◽  
Hidenori Akiyama ◽  
Susumu Takeda
Keyword(s):  
High Frequency ◽  
High Frequency Field ◽  
Loss Cone ◽  
Frequency Field

Turbulent bremsstrahlung instability of whistler mode in the presence of enhanced ion-acoustic fluctuations

1984 ◽  
Vol 31 (3) ◽  
pp. 477-485 ◽  
Author(s):  
S. N. Sarma ◽  
M. Nambu ◽  
S. Bujarbarua
Keyword(s):  
Growth Rate ◽  
Electric Fields ◽  
High Frequency ◽  
Low Frequency ◽  
Resonant Interaction ◽  
Plasma Instability ◽  
Whistler Mode ◽  
Acoustic Fluctuations ◽  
Ion Acoustic ◽  
Nonlinear Force

In the presence of a low-frequency ion-acoustic turbulence and a high-frequency whistler-mode test wave, a new plasma instability occurs owing to a nonlinear force which originates from the resonant interaction between electrons and modulated nonlinear electric fields. The growth rate of the whistler mode is calculated and compared with observations.

Viscoelastic Probes of Suspension Structure

1986 ◽  
Vol 73 ◽  
Author(s):  
C. F. Zukoski ◽  
J. W. Goodwin ◽  
R. W. Hughes ◽  
S. J. Partridge
Keyword(s):  
High Frequency ◽  
Volume Fraction ◽  
Particle Interaction ◽  
Pair Interaction ◽  
Particle Interactions ◽  
Concentrated Suspensions ◽  
Interaction Potentials ◽  
Particle Distributions ◽  
Powder Compacts ◽  
Suspension Structure

ABSTRACTThe use of the high frequency elastic modulus, G∞, to probe particle interactions in weakly agglomerated, concentrated suspensions is discussed. We show that a model based on pair interaction potentials and a statistical description of pair spatial distribution yields accurate prediction of the volume fraction dependence of G∞. The use of statistical treatments of particle distributions as predicted from particle interaction potentials is found to provide insight on how surface chemistry affects the uniformity of powder compacts.

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.

Enhanced Scattering Inherent to "Loss-Cone" Particle Distributions

1972 ◽  
Vol 28 (26) ◽  
pp. 1686-1688 ◽  
Author(s):  
D. E. Baldwin ◽  
J. D. Callen
Keyword(s):  
Loss Cone ◽  
Particle Distributions
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