Nonlinear resonant ion heating in a magneto-plasma

1970 ◽  
Vol 48 (16) ◽  
pp. 1894-1905 ◽  
Author(s):  
P. Jayasimha ◽  
W. B. Thompson
Keyword(s):  
High Frequency ◽  
Cyclotron Frequency ◽  
Nonlinear Process ◽  
Ion Heating ◽  
Power Absorption ◽  
Hot Plasma ◽  
Ion Cyclotron ◽  
High Frequency Waves

A calculation is presented of the power absorption by ions in a hot plasma through a nonlinear process in which a wave near the ion cyclotron frequency is excited by the mixing of two high-frequency waves. The high-frequency waves are so selected as to match vacuum waves at a plasma–vacuum boundary.

Inhomogeneity effects on the absorption of electromagnetic high-frequency waves by magnetized Maxwellian plasmas

1990 ◽  
Vol 43 (3) ◽  
pp. 335-356 ◽  
Author(s):  
R. A. Caldela Fo ◽  
R. S. Schneider ◽  
L. F. Ziebell
Keyword(s):  
Magnetic Field ◽  
High Frequency ◽  
Electromagnetic Waves ◽  
Cyclotron Frequency ◽  
Electron Cyclotron ◽  
Temperature Anisotropy ◽  
Plasma Parameters ◽  
Electron Cyclotron Frequency ◽  
High Frequency Waves ◽  
The Magnetic Field

Inhomogeneity effects on the absorption of high-frequency electromagnetic waves by magnetized Maxwellian plasmas are considered, and in particular the propagation and absorption of the ordinary and extraordinary modes propagating perpendicularly to the magnetic field are analysed. We show that, for small values of the ratio of the electron plasma frequency to the electron-cyclotron frequency, the inhomogeneity effects are more important for the ordinary mode, and that for values of this ratio close to or greater than unity the effects become pronounced for the extraordinary mode. It is also shown that, for a given value of this ratio, and for a fixed value of the ratio of electron-cyclotron frequency to wave frequency, the inhomogeneity effects tend to increase as the ambient magnetic field decreases. The temperature dependence of the effect, the dependence on the direction of propagation l'elative to the inhomogeneity, the influence of temperature anisotropy, and the isolated contribution of the gradients of different plasma parameters are investigated. Several circumstances in which instabilities may occur are mentioned.

Fourier transform ion cyclotron resonance mass spectrometry at the true cyclotron frequency

2021 ◽  
Author(s):  
Konstantin O. Nagornov ◽  
Oleg Y. Tsybin ◽  
Edith Nicol ◽  
Anton N. Kozhinov ◽  
Yury O. Tsybin
Keyword(s):  
Mass Spectrometry ◽  
Fourier Transform ◽  
Cyclotron Resonance ◽  
Cyclotron Frequency ◽  
Ion Cyclotron Resonance ◽  
Ion Cyclotron

First VIKING results: high frequency waves

1988 ◽  
Vol 37 (3) ◽  
pp. 469-474 ◽  
Author(s):  
A Bahnsen ◽  
M Jespersen ◽  
E Ungstrup ◽  
R Pottelette ◽  
M Malingre ◽  
...  
Keyword(s):  
High Frequency ◽  
High Frequency Waves

Preferential acceleration of heavy ions from thermal velocities

1968 ◽  
Vol 46 (10) ◽  
pp. S638-S641 ◽  
Author(s):  
D. B. Melrose
Keyword(s):  
Frequency Spectrum ◽  
High Frequency ◽  
Heavy Ions ◽  
Crab Nebula ◽  
Low Frequency ◽  
High Frequency Waves ◽  
Hydromagnetic Waves ◽  
The Crab Nebula ◽  
Low Frequency Waves

The acceleration of ions from thermal velocities is analyzed to determine conditions under which heavy ions can be preferentially accelerated. Two accelerating mechanisms involving high-and low-frequency hydromagnetic waves respectively are considered. Preferential acceleration of heavy ions occurs for high-frequency waves if the frequency spectrum falls off faster than (frequency)−1. For the low-frequency waves heavy ions are less effectively accelerated than lighter ions. However, very heavy ions can be preferentially accelerated, the abundances of the very heavy ions being enhanced by a factor Ai over the thermal abundances. Acceleration of ions in the envelope of the Crab nebula is considered as an example.

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