Parametric coupling of lower hybrid wave with gyrating ion beam driven ion cyclotron instability in a plasma

We study the quasimode decay of a lower-hybrid wave and a damped ion cyclotron wave in a plasma having two kinds of electrons. This decay channel is also investigated for a cylindrical plasma. The behaviour of the threshold and growth rate with variations in Tn/Tc and non/noc are studied, and a comparison is made with previous results. Our results show that the growth rate and the threshold for the onset of parametric decay are influenced by the presence of the second electron species.

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Excitation of lower hybrid wave by an ion beam in magnetized plasma

Laser and Particle Beams ◽

10.1017/s0263034613000591 ◽

2013 ◽

Vol 31 (4) ◽

pp. 747-752 ◽

Cited By ~ 4

Author(s):

Ved Prakash ◽

Ruby Gupta ◽

Suresh C. Sharma ◽

Vijayshri

Keyword(s):

Growth Rate ◽

Ion Beam ◽

Maximum Growth ◽

Maximum Growth Rate ◽

Magnetized Plasma ◽

Unstable Wave ◽

Lower Hybrid ◽

Hybrid Wave ◽

Lower Hybrid Wave ◽

Beam Density

AbstractLower hybrid wave excitation in magnetized plasma by an ion beam via Cerenkov interaction is studied. The lower hybrid modes showed maximum growth rate of the instability when phase velocity of the lower hybrid mode along the magnetic field is comparable to the electron thermal velocity. We have derived the expression for the maximum growth rate and found that the growth rate of the instability increases with beam density. Moreover, the maximum growth rate of the instability scales as the one-third power of the beam density. The real part of the frequency of the unstable wave increases as almost the square root of the beam energy.

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Excitation of lower hybrid wave by an ion beam in magnetized plasma – Reinvestigated

Optik ◽

10.1016/j.ijleo.2020.165216 ◽

2020 ◽

Vol 218 ◽

pp. 165216

Author(s):

Suresh Chandra ◽

Mohit Kumar Sharma

Keyword(s):

Ion Beam ◽

Magnetized Plasma ◽

Lower Hybrid ◽

Hybrid Wave ◽

Lower Hybrid Wave

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Decay of the lower-hybrid wave into an ion cyclotron mode and a whistler wave

Journal of Plasma Physics ◽

10.1017/s0022377800000155 ◽

1982 ◽

Vol 28 (1) ◽

pp. 149-157 ◽

Cited By ~ 2

Author(s):

M. K. Saxena

Keyword(s):

Short Wavelength ◽

Whistler Wave ◽

Lower Hybrid ◽

Hybrid Wave ◽

Lower Hybrid Wave ◽

Parametrically Excited ◽

Ion Cyclotron ◽

Cyclotron Mode ◽

Hybrid Waves ◽

Lower Hybrid Waves

The electrostatic lower-hybrid wave is shown to decay parametrically into a whistler wave and a resonant ion cyclotron mode or an ion cyclotron quasi-mode or a reactive quasi-mode. The convective threshold powers for these decay instabilities are found to be much larger than presently available pump powers. These decay instabilities, however, are expected to play an important role in the saturation of the parametrically excited short-wavelength lower-hybrid waves having frequency close to ωlh.

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