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Title:
Effect of dust particle and magnetic field on EEPF and plasma oscillation
Authors:
Kalita, D.; Kakati, B.; Kausik, S. S.; Saikia, B. K.; Bandyopadhyay, M.
Affiliation:
AA(Centre of Plasma Physics-IPR, Nazirakhat, Sonapur, Kamrup -782 402, Assam, India 0000-0001-7706-9696), AC(Centre of Plasma Physics-IPR, Nazirakhat, Sonapur, Kamrup -782 402, Assam, India), AD(Centre of Plasma Physics-IPR, Nazirakhat, Sonapur, Kamrup -782 402, Assam, India), AE( 0000-0002-8587-9098)
Publication:
Journal of Plasma Physics, Volume 85, Issue 4, id.905850402
Publication Date:
08/2019
Origin:
CUP
Keywords:
dusty plasmas, plasma devices, plasma properties
Abstract Copyright:
2019: Cambridge University Press
DOI:
10.1017/S0022377819000461
Bibliographic Code:
2019JPlPh..85d9002K

Abstract

The significance of dust particles for the electron energy probability function (EEPF) and plasma oscillations is studied under varying magnetic field strength in a filamentary discharge hydrogen plasma. The experimental result shows that with an increase in dust density, the electron density decreases as a result of the charging of dust grains in the plasma background. A bi-Maxwellian EEPF is computed in both a pristine hydrogen plasma and a dust-containing plasma at different magnetic field strengths. We have observed that the increase in magnetic field decreases the lower energy electron population. The electron population of the lower energy range shows nearly identical results at magnetic field, mT whereas the behaviour of the high-energy electron population becomes identical for a field strength mT. From the observation, we have seen that the mid energy electron population slightly decreases and the high energy electron population slightly increases due to the presence of dust particles as compared to a pristine plasma. Further, very low energy electron population remains almost unchanged. With increase in dust density, the mid energy electron population further decreases whereas the high energy electron population slightly increases for different magnetic fields. But, no changes were observed for the very low energy electron population in the presence of dust particles. From the study of plasma oscillation, it is observed that the dominant frequency associated with the plasma oscillation is matched with the ion cyclotron frequency. The amplitude of the ion cyclotron frequency reduces with the increase of dust density which might be due to the decrease of plasma density.
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