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Experimental observations of multiple modes of filamentary structures in the magnetized dusty plasma experiment (MDPX) device.
- Source :
- Physics of Plasmas; Jan2022, Vol. 29 Issue 1, p1-10, 10p
- Publication Year :
- 2022
-
Abstract
- Due to the small charge-to-mass ratio of dust particles, it is often necessary to use large magnetic fields of B ≥ 1 T, in order to observe the influence of magnetic forces in laboratory dusty plasmas. However, when experiments are performed at high magnetic fields in capacitively coupled, radio frequency discharges used for these dusty plasma experiments, the plasma is often observed to form filamentary structures between the electrodes that are aligned to the external magnetic field which disrupt the uniformity of the plasma and adversely impact some of our dusty plasma experiments. Recent experiments performed in the Magnetized Dusty Plasma Experiment device seek to identify and characterize these filamentary structures. This paper discusses the morphology of several distinct filamentary modes that are formed in low temperature argon plasmas. Three different spatial modes of filaments that appear to be strongly dependent on the magnetic field and neutral pressure are identified. There is strong evidence that each spatial mode has a threshold condition that is dependent on the ion Hall parameter. The criteria for the formation of the filaments are shown to be consistent with predictions of recent numerical simulations. [ABSTRACT FROM AUTHOR]
- Subjects :
- DUSTY plasmas
LOW temperature plasmas
DUST
MAGNETIC fields
PLASMA devices
MAGNETISM
Subjects
Details
- Language :
- English
- ISSN :
- 1070664X
- Volume :
- 29
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Physics of Plasmas
- Publication Type :
- Academic Journal
- Accession number :
- 154999025
- Full Text :
- https://doi.org/10.1063/5.0065516