Toward an Integrated View of Ionospheric Plasma Instabilities: 3. Explicit Growth Rate and Oscillation Frequency for Arbitrary Altitude

2019 ◽  
Vol 124 (7) ◽  
pp. 6138-6155 ◽  
Author(s):  
Roman A. Makarevich
Keyword(s):  
Growth Rate ◽  
Oscillation Frequency ◽  
Ionospheric Plasma ◽  
Plasma Instabilities

Growth rate and oscillation frequency of electrified jet and droplet: Effects of charge and electric field

2018 ◽  
Vol 52 (9) ◽  
pp. 1070-1082
Author(s):  
Boo-Hyoung Bang ◽  
Min-Woo Kim ◽  
Yong-Il Kim ◽  
Sam S. Yoon
Keyword(s):  
Growth Rate ◽  
Electric Field ◽  
Oscillation Frequency

scholarly journals A Study on Instabilities and Nonlinear Wave Energy Exchange Process in Terrestrial Ionospheric Plasma

2021 ◽  
pp. 12-19
Author(s):  
S. J. Gogoi
Keyword(s):  
Growth Rate ◽  
Nonlinear Wave ◽  
Wave Energy ◽  
High Frequency ◽  
Energy Exchange ◽  
Ionospheric Plasma ◽  
Exchange Process ◽  
Particle Interaction ◽  
Nonlinear Effects ◽  
Plasma Waves

From ground and satellite based observatories, various forms of nonlinear effects and plasma waves instabilities are observed in the Earth’s ionosphere. In this paper we present a brief review on nonlinear wave-particle interaction energy exchange mode plasma maser instability and on probable growth rate of high frequency non-resonant waves at different regions of the Earth’s ionosphere.

Collisionless electrostatic interchange instabilities

1982 ◽  
Vol 28 (3) ◽  
pp. 551-564 ◽  
Author(s):  
S. Peter Gary ◽  
Michelle F. Thomsen
Keyword(s):  
Magnetic Field ◽  
Growth Rate ◽  
Dispersion Equation ◽  
Uniform Magnetic Field ◽  
Collisionless Plasma ◽  
Lower Hybrid ◽  
Plasma Instabilities ◽  
Weak Density ◽  
Interchange Instability ◽  
Kinetic Mode

The linear Vlasov dispersion equation for electrostatic plasma instabilities driven by gravity and weak density gradients perpendicular to a uniform magnetic field is derived and solved numerically. Two interchange instabilities emerge: the well-known fluid mode at long wavelengths and a kinetic mode at wavelengths short compared with the ion gyroradius. The properties of both instabilities are studied, as well as the effects of gravity on the universal and lower-hybrid density drift instabilities. The results show that the kinetic interchange generally has a larger growth rate than the fluid interchange instability, indicating that, whenever the latter is present in a collisionless plasma, the former may also be found.

scholarly journals The thresholds of ionospheric plasma instabilities pumped by high‐frequency radio waves at EISCAT

2013 ◽  
Vol 118 (11) ◽  
pp. 7472-7481 ◽  
Author(s):  
C. J. Bryers ◽  
M. J. Kosch ◽  
A. Senior ◽  
M. T. Rietveld ◽  
T. K. Yeoman
Keyword(s):  
High Frequency ◽  
Ionospheric Plasma ◽  
Plasma Instabilities ◽  
Radio Waves

The threshold energy for atom displacement in fcc metals

1990 ◽  
Vol 48 (4) ◽  
pp. 530-531
Author(s):  
Wilfried Sigle ◽  
Matthias Hohenstein ◽  
Alfred Seeger
Keyword(s):  
Growth Rate ◽  
Elevated Temperatures ◽  
Threshold Energy ◽  
Dislocation Loops ◽  
Absolute Minimum ◽  
Voltage Electron ◽  
Atom Displacement ◽  
Electron Microscopes ◽  
Fcc Metal

Prolonged electron irradiation of metals at elevated temperatures usually leads to the formation of large interstitial-type dislocation loops. The growth rate of the loops is proportional to the total cross-section for atom displacement,which is implicitly connected with the threshold energy for atom displacement, Ed . Thus, by measuring the growth rate as a function of the electron energy and the orientation of the specimen with respect to the electron beam, the anisotropy of Ed can be determined rather precisely. We have performed such experiments in situ in high-voltage electron microscopes on Ag and Au at 473K as a function of the orientation and on Au as a function of temperature at several fixed orientations.Whereas in Ag minima of Ed are found close to <100>,<110>, and <210> (13-18eV), (Fig.1) atom displacement in Au requires least energy along <100>(15-19eV) (Fig.2). Au is thus the first fcc metal in which the absolute minimum of the threshold energy has been established not to lie in or close to the <110> direction.

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