Deka, K. and Paul, R. and Sharma, G. and Das, N. and Adhikari, S. and Moulick, R. and Kausik, S. S. and Saikia, B. K. and Chin, O. H. and Wong, C. S. (2023) Effect of external magnetic field and dust grains on the properties of ion-acoustic waves. Journal of Plasma Physics, 89 (5). ISSN 0022-3778, DOI https://doi.org/10.1017/S0022377823000661.
Full text not available from this repository.Abstract
An experimental study to investigate the effect of an external magnetic field on the propagation of ion-acoustic waves (IAWs) has been carried out in hydrogen plasma containing two-temperature electrons and dust grains. It is a first step in understanding the propagation properties of IAWs in such an environment. A low-pressure hot cathode discharge method is chosen for plasma production. The desired two-electron groups with distinct temperatures are achieved by inserting two magnetic cages with a cusp-shaped magnetic field of different surface field strengths in the same chamber. The dust grains are dropped into the plasma with the help of a dust dropper, which gain negative charges by interacting with the plasma. The IAWs are excited with the help of a mesh grid inserted into the plasma. A planar Langmuir probe is used as a detector to detect the IAWs. The time-of-flight technique has been applied to measure the phase velocity of the IAWs. The results suggest that in the presence of a magnetic field, the phase velocity of IAWs increases, whereas introducing the dust particles leads to the lower phase velocity. The magnetic field is believed to have a significant effect on the wave damping. This study will aid in utilising IAWs as a diagnostic tool to estimate plasma parameters in the presence of an external magnetic field.
| Item Type: | Article |
|---|---|
| Funders: | None |
| Uncontrolled Keywords: | Dusty plasmas; Plasma diagnostics; Plasma waves |
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 01 Nov 2025 13:43 |
| Last Modified: | 01 Nov 2025 13:43 |
| URI: | http://eprints.um.edu.my/id/eprint/48635 |
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