Ion beam driven ion-cyclotron waves in a plasma cylinder with negative ions

2001 ◽  
Vol 8 (3) ◽  
pp. 679-686 ◽  
Author(s):  
Suresh C. Sharma ◽  
M. P. Srivastava
Keyword(s):  
Ion Beam ◽  
Negative Ions ◽  
Plasma Cylinder ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron

Excitation of ion-cyclotron waves by a spiralling ion beam in a plasma cylinder

1993 ◽  
Vol 50 (2) ◽  
pp. 331-338 ◽  
Author(s):  
S. C. Sharma ◽  
V. K. Tripathi
Keyword(s):  
Growth Rate ◽  
Energy Transfer ◽  
Beam Energy ◽  
Cyclotron Frequency ◽  
Ion Beam ◽  
Harmonic Number ◽  
Plasma Cylinder ◽  
Higher Harmonics ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron

A helical ion beam propagating through a plasma cylinder drives electrostatic ion-cyclotron waves to instability via cyclotron interaction. Higher harmonics of the beam cyclotron frequency can be generated in this way. The growth rate increases with the harmonic number. The efficiency of beam energy transfer to the wave can be of the order of a few per cent.

Ion beam excitation of ion-cyclotron waves and ion heating in plasmas with drifting ions

1978 ◽  
Vol 19 (2) ◽  
pp. 237-252 ◽  
Author(s):  
J. P. Hauck ◽  
H. Böhmer ◽  
N. Rynn ◽  
Gregory Benford
Keyword(s):  
Magnetic Field ◽  
Ion Beam ◽  
Ion Beams ◽  
Ion Heating ◽  
Ion Cyclotron Waves ◽  
Diffusion Effects ◽  
Ion Cyclotron ◽  
Cyclotron Mode ◽  
The Magnetic Field ◽  
Beam Excitation

Ion-cyclotron waves are excited by cesium and potassium ion beams in cesium and potassium Q-machine plasmas. The ion beams are injected along the magnetic field with care to avoid beam transverse velocities. The observed ion-cyclotron mode frequencies are below those driven by electron currents. These resonant instabilities are convective in character with small spatial growth rates ki/kr ≃ 0.05. Plasma ion heating is observed and is consistent with a model in which mode amplitudes are saturated by diffusion effects.

Ion beam expansion due to ion cyclotron wave interactions

1979 ◽  
Vol 21 (1) ◽  
pp. 19-25 ◽  
Author(s):  
J. P. Hauck ◽  
Gregory Benford
Keyword(s):  
Magnetic Field ◽  
Diffusion Process ◽  
Ion Beam ◽  
Radial Expansion ◽  
Wave Interactions ◽  
Beam Spreading ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron ◽  
Guide Magnetic Field

We observe radial expansion of an ion beam propagating along a homogeneous guide magnetic field. The beam spreading appears to arise from interactions with beam-excited resonant ion cyclotron waves. Magnitude and scaling of the expansion agree with a theory based on a resonant diffusion process.

Electrostatic ion-cyclotron waves in a plasma with heavy negative ions

2008 ◽  
Vol 56 (11) ◽  
pp. 1552-1559 ◽  
Author(s):  
S.-H. Kim ◽  
J.R. Heinrich ◽  
R.L. Merlino
Keyword(s):  
Negative Ions ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron

Behaviors of electrostatic ion cyclotron waves excited in ion beam-plasma systems

1976 ◽  
Vol 57 (3) ◽  
pp. 230-232 ◽  
Author(s):  
M. Sugawa ◽  
R. Sugaya ◽  
H. Nomoto
Keyword(s):  
Ion Beam ◽  
Ion Cyclotron Waves ◽  
Beam Plasma ◽  
Ion Cyclotron

scholarly journals Excitation of ion Bernstein and ion cyclotron waves by a gyrating ion beam in a plasma column

2011 ◽  
Vol 30 (1) ◽  
pp. 9-16 ◽  
Author(s):  
Asheel Kumar ◽  
V.K. Tripathi
Keyword(s):  
Phase Velocity ◽  
Ion Beam ◽  
Plasma Heating ◽  
Wave Number ◽  
Larmor Radius ◽  
Nonlocal Effects ◽  
Neutral Beams ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron ◽  
Bernstein Wave

AbstractGyrating ion beams, produced by quick ionization of neutral beams, employed for plasma heating, are susceptible to ion Bernstein and ion cyclotron instabilities. The Bernstein wave, having large parallel phase velocity, is excited via cyclotron interaction whereas the ion cyclotron wave with lower parallel phase velocity could be driven by Cerenkov interaction as well. The maximally growing modes have transverse wave number of the order of inverse ion Larmor radius. The nonlocal effects cause reduction in the growth rate.

Ion-beam-excited electrostatic ion cyclotron waves

1976 ◽  
Vol 55 (6) ◽  
pp. 345-346 ◽  
Author(s):  
P. Michelsen ◽  
H.L. Pécseli ◽  
J.Juul Rasmussen ◽  
N. Sato
Keyword(s):  
Ion Beam ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron
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