scholarly journals Parametric instabilities excited by localized pumps near the lower-hybrid frequency

1976 ◽  
Author(s):  
Y. Y. Kuo ◽  
L. Chen
Keyword(s):  
Lower Hybrid ◽  
Hybrid Frequency ◽  
Parametric Instabilities

scholarly journals Parametric Instabilities in Lower-Hybrid-Frequency Heating of a Tokamak

1979 ◽  
Vol 43 (8) ◽  
pp. 586-589 ◽  
Author(s):  
T. Imai ◽  
T. Nagashima ◽  
T. Yamamoto ◽  
K. Uehara ◽  
S. Konoshima ◽  
...  
Keyword(s):  
Lower Hybrid ◽  
Hybrid Frequency ◽  
Parametric Instabilities ◽  
Frequency Heating

Parametric instabilities of trapped upper-hybrid oscillations

1997 ◽  
Vol 58 (4) ◽  
pp. 747-769 ◽  
Author(s):  
E. MJØLHUS
Keyword(s):  
Wave Structure ◽  
Arithmetic Mean ◽  
The Other ◽  
Lower Hybrid ◽  
Two Dimensional ◽  
Applied Frequency ◽  
Hybrid Frequency ◽  
Density Depletion ◽  
Wave Resonance ◽  
Parametric Instabilities

Parametric instabilities of upper-hybrid oscillations trapped in a plasma density depletion across an ambient magnetic field are investigated. Approximate dispersion relations are derived, which lead to the identification of two parametric instabilities of the localized upper-hybrid bounded wave structure. Both are related to trapped upper-hybrid oscillation resonances. The first is a decay to a frequency of a trapped wave resonance, downshifted from the applied frequency, where the downshift must be slightly larger than the lower-hybrid frequency. The second instability can exist when the applied frequency is slightly below the arithmetic mean of the frequencies of two trapped oscillation resonances; then the antiStokes component of one is in resonance with the Stokes component of the other. Both slab and two-dimensional geometries are considered.

Effects of Ion Temperature Anisotropy on Parametric Instabilities near the Lower-Hybrid Frequency

1985 ◽  
Vol 31 (6) ◽  
pp. 594-595 ◽  
Author(s):  
V G Panchenko ◽  
V N Pavlenko ◽  
E Näslund ◽  
L Stenflo
Keyword(s):  
Lower Hybrid ◽  
Ion Temperature ◽  
Temperature Anisotropy ◽  
Hybrid Frequency ◽  
Parametric Instabilities
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