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Resonant decay of a Langmuir wave in the presence of dust grains in a cylindrical plasma
Author(s) -
Gahlot Ajay,
Sharma Suresh C.
Publication year - 2018
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201700195
Subject(s) - langmuir probe , plasma , atomic physics , instability , radius , resonance (particle physics) , ion , langmuir , physics , dusty plasma , plasma oscillation , electron , plasma parameters , plasma diagnostics , chemistry , nuclear physics , quantum mechanics , aqueous solution , computer science , mechanics , computer security
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 δ c (where δ 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 δ 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 ( μ th ) on the plasma cylinder radius.