Excitation of lower hybrid waves by a spiraling ion beam in a magnetized dusty plasma cylinder

Sharma, Suresh C.; Walia, Ritu

doi:10.1063/1.2983139

Cited by 16 publications

(5 citation statements)

References 29 publications

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“…For a weak magnetic field, the grain charge fluctuation q d1 is governed by the following relation [45],…”

Section: Theoretical Modelmentioning

confidence: 99%

Low-frequency wiggler modes in the free-electron laser with a dusty magnetoplasma medium

Jafari¹

2015

Laser Phys. Lett.

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An advanced incremental scheme for generating tunable coherent radiation in a freeelectron laser has been presented: the basic concept is the use of a relativistic electron beam propagating through a magnetized dusty plasma channel where dust helicon, dust Alfven and coupled dust cyclotron-Alfven waves can play a role as a low-frequency wiggler, triggering coherent emissions. The wiggler wavelength at the sub-mm level allows one to reach the wavelength range from a few nm down to a few Å with moderately relativistic electrons of kinetic energies of a few tens/hundreds of MeV. The laser gain and the effects of beam selfelectric and self-magnetic fields on the gain have been estimated and compared with findings of the helical magnetic and electromagnetic wigglers in vacuum. To study the chaotic regions of the electron motion in the dusty plasma wave wiggler, a time independent Hamiltonian has been obtained. The Poincare surface of a section map has been used numerically to analyze the nonintegrable system where chaotic regions in phase-space emerge. This concept opens a path toward a new generation of synchrotron sources based on compact plasma structures.

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“…For a weak magnetic field, the grain charge fluctuation q d1 is governed by the following relation [45],…”

Section: Theoretical Modelmentioning

confidence: 99%

Low-frequency wiggler modes in the free-electron laser with a dusty magnetoplasma medium

Jafari¹

2015

Laser Phys. Lett.

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“…In laboratory dusty plasma discharges, new effects are introduced by the dust charge fluctuation dynamics, dust-dust interactions, dust grain rotation, and the plasma boundary, which are unique for dusty plasma (Shukla & Mamun, 2002;Shukla & Eliasson, 2009). Theoretically, dust effects have been investigated by extending the usual two-fluid treatment of plasmas with the addition of a third component -the dust (Sharma & Sugawa, 1999;Sharma & Srivastava, 2001;Lee & Jung, 2005;Sharma & Walia, 2008;Prakash & Sharma, 2009;Gupta et al, 2010). Ostrikov et al (1999) have studied the effect of dust on surface wave produced microwave discharges and found that the dust can lead to a modification of the electromagnetic field structure in the discharge by shifting the originally excited operating mode out of resonance.…”

Section: Introductionmentioning

confidence: 98%

Surface wave excitation by a density modulated electron beam in a magnetized dusty plasma cylinder

et al. 2013

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This paper studies the surface plasma wave excitation via Cerenkov and fast cyclotron interaction by a density modulated electron beam propagating through a magnetized dusty plasma cylinder. The dispersion relation of surface plasma waves has been derived and it has been shown that the phase velocity of waves increases with increase in relative density δ(= n io / n e0, where n i0 is the ion plasma density and n e0 is the electron plasma density) of negatively charged dust grains. The beam radius is taken slightly less than the radius of dusty plasma cylinder. The frequency and the growth rate of the unstable wave instability increases with increase in the value of δ and normalized frequency ω/ω pe . The growth rate of the instability increases with the beam density and scales as one-third power of the beam density in Cerenkov interaction and square root of beam density in fast cyclotron interaction. The dispersion relation of surface plasma waves has been retrieved from the derived dispersion relation by considering that the beam is absent and there are no dust grains in the plasma cylinder.

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“…Electrostatic waves have been investigated with great interest in dusty plasmas in recent years . Barkan et al experimentally observed the variation of the phase velocity with the parameter δ (where δ is the ratio between the ion and electron density) and Landau damping of the ion acoustic (IA) wave.…”

Section: Introductionmentioning

confidence: 99%

Resonant decay of a Langmuir wave in the presence of dust grains in a cylindrical plasma

Gahlot¹,

Sharma

2018

Contributions to Plasma Physics

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The resonant parametric decay of a Langmuir wave into a backward propagating Langmuir wave and an ion acoustic (IA) wave is studied in a cylindrical dusty plasma. The analysis shows that the frequency of the IA mode decreases with the parameter c (where c is the ratio of the ion density to the electron density) for negatively charged dust grains. The growth rate of the resonance decay instability (RDI) and the threshold required for its onset also decrease with c and are strongly dependent on the electron to ion temperature ratio for both positively and negatively charged dust grains. The results obtained also illustrate the dependence of the threshold of the resonance decay instability ( th ) on the plasma cylinder radius. KEYWORDSdust grains, Langmuir wave, resonance decay instability and growth rate 1

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Excitation of lower hybrid waves by a spiraling ion beam in a magnetized dusty plasma cylinder

Cited by 16 publications

References 29 publications

Low-frequency wiggler modes in the free-electron laser with a dusty magnetoplasma medium

Low-frequency wiggler modes in the free-electron laser with a dusty magnetoplasma medium

Surface wave excitation by a density modulated electron beam in a magnetized dusty plasma cylinder

Resonant decay of a Langmuir wave in the presence of dust grains in a cylindrical plasma

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