Effect of ICRF Mode Conversion at the Ion-Ion Hybrid Resonance on Plasma Confinement in JET

2003 ◽  
Author(s):  
A. Lyssoivan
Keyword(s):  
Mode Conversion ◽  
Plasma Confinement ◽  
Hybrid Resonance

Electron-acoustic and ion-ion hybrid resonance-drift instability in inhomogeneous multi-ion-species magnetoplasmas

1984 ◽  
Vol 32 (2) ◽  
pp. 255-261 ◽  
Author(s):  
Shefali S. Dash ◽  
A. S. Sharma ◽  
B. Buti
Keyword(s):  
Magnetic Field ◽  
Wave Propagation ◽  
Mode Conversion ◽  
Density Gradients ◽  
Hybrid Resonance ◽  
Electron Acoustic ◽  
Drift Instability ◽  
Ion Species ◽  
The Magnetic Field

Electron-acoustic (EA) and ion-ion-hybrid resonance (IIHR) waves, in a multi-ion-species magnetoplasma with density gradients perpendicular to the magnetic field and the direction of wave propagation are found to be drift unstable provided the inhomogeneities exceed a certain threshold. The possibility of mode conversion between the EA and the IIHR waves is examined.

scholarly journals Mode conversion and electron heating near the upper-hybrid resonance frequency

1985 ◽  
Vol 28 (6) ◽  
pp. 1772 ◽  
Author(s):  
Bruce L. Smith ◽  
H. Okuda ◽  
H. Abe
Keyword(s):  
Resonance Frequency ◽  
Mode Conversion ◽  
Electron Heating ◽  
Hybrid Resonance

Full-wave calculations of the O-X mode conversion process

1988 ◽  
Vol 39 (2) ◽  
pp. 319-337 ◽  
Author(s):  
F. R. Hansen ◽  
J. P. Lynov ◽  
C. Maroli ◽  
V. Petrillo
Keyword(s):  
Wave Propagation ◽  
Boundary Value Problem ◽  
Numerical Solutions ◽  
Mode Conversion ◽  
Inhomogeneous Plasma ◽  
Collisionless Plasma ◽  
Point Boundary ◽  
Full Wave ◽  
Hybrid Resonance ◽  
Scale Length

A two-point boundary-value problem has been formulated that describes the conversion between ordinary (O) and extraordinary (X) wave modes in a cold inhomogeneous plasma. Numerical solutions to this problem have been obtained for various values of the WKB parameter k0L; where k0 is the vacuum wavenumber and L the density-gradient scale length. The results are compared with three different theoretical expressions for the O-X mode conversion efficiency derived by others in the WKB limit of k0 L ≫ l. Most of the results presented in this paper are obtained for a collisionless plasma with finite density near the plasma cut-off density. However, some examples are also given of wave propagation from vacuum. In these examples, collision effects are added to the equations in order to remove the singularity otherwise present at the position of the upper hybrid resonance layer.

Fast-slow mode conversion near the ion-ion hybrid resonance

1978 ◽  
Vol 20 (7) ◽  
pp. 689-701
Author(s):  
I Fidone ◽  
L Gomberoff
Keyword(s):  
Mode Conversion ◽  
Slow Mode ◽  
Hybrid Resonance
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