Influence of plasma parameters on the absorption coefficient of alpha particles to lower hybrid waves in tokamaks

2014 ◽  
Vol 40 (12) ◽  
pp. 932-938 ◽  
Author(s):  
J. Wang ◽  
X. Zhang ◽  
L. Yu ◽  
X. Zhao
Keyword(s):  
Absorption Coefficient ◽  
Alpha Particles ◽  
Lower Hybrid ◽  
Plasma Parameters ◽  
Hybrid Waves ◽  
Lower Hybrid Waves

Lower-hybrid instability in current-carrying plasmas

1982 ◽  
Vol 28 (3) ◽  
pp. 527-537 ◽  
Author(s):  
Joseph E. Willett ◽  
Hassan Mehdian
Keyword(s):  
Phase Velocity ◽  
Drift Velocity ◽  
Numerical Study ◽  
Electron Drift Velocity ◽  
Lower Hybrid ◽  
Electron Drift ◽  
Plasma Parameters ◽  
The Stability ◽  
Hybrid Waves ◽  
Lower Hybrid Waves

The stability of lower-hybrid waves in a collisional, fully ionized plasma carrying a field-aligned current is investigated. From the two-fluid equations in the cold-plasma approximation, a generalized dispersion relation and formulae for the real frequency ωI and growth rate ωR are derived. The results of a numerical study are presented showing the dependence of ωR and ωI on the angle between the direction of propagation and the magnetic field, the ratio of the electron drift velocity to the parallel phase velocity, and other plasma parameters. Lower-hybrid instability with electron drift velocity small compared with the parallel phase velocity is predicted.

Self-consistent simulations of the interaction between fusion-born alpha particles and lower hybrid waves in ITER

2009 ◽  
Vol 49 (12) ◽  
pp. 125005 ◽  
Author(s):  
M. Schneider ◽  
L.-G. Eriksson ◽  
F. Imbeaux ◽  
J-F. Artaud
Keyword(s):  
Alpha Particles ◽  
Lower Hybrid ◽  
Self Consistent ◽  
Hybrid Waves ◽  
Lower Hybrid Waves

scholarly journals Properties of lower hybrid waves

2008 ◽  
Vol 4 (S257) ◽  
pp. 569-573 ◽  
Author(s):  
Alix L. Verdon ◽  
I. H. Cairns ◽  
D. B. Melrose ◽  
P. A. Robinson
Keyword(s):  
Dispersion Relation ◽  
Dispersion Curves ◽  
Numerical Dispersion ◽  
Lower Hybrid ◽  
Plasma Parameters ◽  
Plasma Effects ◽  
Warm Plasma ◽  
Hybrid Waves ◽  
Lower Hybrid Waves ◽  
Good Agreement

AbstractMost treatments of lower hybrid waves include either electromagnetic or warm-plasma effects, but not both. Here we compare numerical dispersion curves for lower hybrid waves with a new analytic dispersion relation that includes both warm and electromagnetic effects. Very good agreement is obtained over significant ranges in wavenumber and plasma parameters, except where ion magnetization effects become important.

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