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

Prakash, Ved; Gupta, Ruby; Sharma, Suresh C.; Vijayshri,

doi:10.1017/s0263034613000591

Cited by 10 publications

(5 citation statements)

References 20 publications

(34 reference statements)

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“…An ion beam moving perpendicular to B can also provide the free energy source for the finite LH wave (Prakash et al., 2013) with finite k z . Similar to the parallel electron beam source, the LH wave can be excited in magnetized plasma by a perpendicular ion beam through Cerenkov interactions.…”

Section: Origin Of the Observed Spwementioning

confidence: 99%

“…The maximum LH growth occurs for a wave propagation angle of 89.1 Degrees. The linear ion beam analysis of (Prakash et al., 2013) has determined that the energy to excite the LH mode is 10–100 time lower than that required for an electron beam. Thus, relatively low energy electron or ion beams could be responsible for the excited LH waves seen as SPWEs in Figures 1a and 1b.…”

Section: Origin Of the Observed Spwementioning

confidence: 99%

See 1 more Smart Citation

Satellite Observations of Strong Plasma Wave Emissions With Frequency Shifts Induced by an Engine Burn From the Cygnus Spacecraft

et al. 2021

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A new discovery was made using the radio receiver instrument on the Canadian enhanced polar outflow probe (e‐POP) showing that strong plasma wave emissions (SPWE) are seen near 17 kHz and 300 Hz. The frequency of these emissions are affected by small injections of neutral gas from the Cygnus spacecraft. The technique of using a 150 g/s thruster to change frequencies and intensities of plasma waves has provided evidence that a finite kz lower hybrid mode may the source of the SPWE waves. SPWE observations in space are a sensitive diagnostic tool to measure both natural and manmade changes in the earth's ion composition.

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Section: Origin Of the Observed Spwementioning

confidence: 99%

Section: Origin Of the Observed Spwementioning

confidence: 99%

Satellite Observations of Strong Plasma Wave Emissions With Frequency Shifts Induced by an Engine Burn From the Cygnus Spacecraft

et al. 2021

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“…It is well known that the ion beams dominantly excite the parallel-propagating waves through the "resonant" and "non-resonant" instabilities. [11][12][13][14][15][16][17][18] The growth rates of these instabilities are usually larger than those of the other instabilities while the left-hand polarized waves are dominantly excited when the beams are relatively hot and/or weak. Heidbrink [19] analysed Alfven instabilities driven by energetic particles in toroidally confined plasmas and observed two modes of Alfven instabilities occurring due to resonance between the orbital frequencies of the energetic particles and the wave phase velocity.…”

Section: Introductionmentioning

confidence: 99%

Generation of an obliquely propagating shear alfven wave in dusty plasma by an ion beam

Gupta

Sharma

2023

Contributions to Plasma Physics

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Ion beam-dusty plasma interaction leads to significant changes in the dispersion relation of shear Alfven wave depending on the beam, dust grain, and plasma parameters. Hydrogen ion beam particles interact with the shear Alfven wave via cyclotron interaction when they counter-propagate with the wave and they can also interact with the co-propagating wave via Cerenkov interaction. The interaction causes beam as well as plasma density fluctuations and gives rise to perpendicular currents. We have analytically obtained the dispersion relation and the growth/damping rate expressions for obliquely propagating shear Alfven waves in dusty plasma. The effect of beam velocity, magnetic field, wave number, dust particle density, and dust charge fluctuations are discussed. It is shown that both the wave frequency and the maximum growth rate decrease with an increase in beam velocity and the variations are different for parallel and perpendicular wave numbers. The dust particles enhance the frequency and maximum growth rate while the dust charge fluctuations induce damping. The results are in good agreement with the experimental observations.

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“…Ion beam and interaction of radiation with plasma allocate a free energy source which can excite different wave modes in a plasma. Plasma waves can be stabilized or destabilized when they interact with electron or ion beams [4][5][6][7][8][9][10][11], and collisions generally have a stabilizing effect on the plasma waves [12,13]. An ion beam can destabilize Alfven waves and whistler waves if the beam speed is sufficiently large.…”

Section: Introductionmentioning

confidence: 99%

Polarization Reversal of Oblique Electromagnetic Wave in Collisional Beam-Hydrogen Plasma

Gupta¹,

Gupta²,

Sharma³

2022

PIER C

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Energetic ion or electron beams cause plasma instabilities. Depending on plasma and the beam parameters, an ion beam leads to change in the dispersion relation of Alfven waves on interacting with magnetoplasmas as it can efficiently transfer its energy to the plasma. We have derived dispersion relation and the growth rates for oblique shear Alfven wave in hydrogen plasma. The particles of the beam interact with the Shear Alfven waves only when they counter-propagate each other and destabilize left-hand polarized mode for parallel waves and left-hand as well as right-hand polarized modes for oblique waves, via fast cyclotron interaction. The collisions between beam ions and plasma components affect the growth rate and the frequency of generated Alfven waves, differently for right-hand (RH) and left-hand (LH) polarized oblique Alfven modes. For (ω + k z v bo > ω bc ), the most unstable mode is the LH polarized oblique Alfven mode, and it is the RH polarized oblique Alfven mode for (ω + k z v bo < ω bc ), which shows a polarization reversal after resonance condition. Numerical results indicate that the growth rates increase with increase in angle of propagation. The maximum growth rate values in the presence or absence of beam increase due to obliquity of wave.

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

Cited by 10 publications

References 20 publications

Satellite Observations of Strong Plasma Wave Emissions With Frequency Shifts Induced by an Engine Burn From the Cygnus Spacecraft

Satellite Observations of Strong Plasma Wave Emissions With Frequency Shifts Induced by an Engine Burn From the Cygnus Spacecraft

Generation of an obliquely propagating shear alfven wave in dusty plasma by an ion beam

Polarization Reversal of Oblique Electromagnetic Wave in Collisional Beam-Hydrogen Plasma

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