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Title: Effect of magnetic field on the phase transition in a dusty plasma

Abstract

The formation of a self-consistent crystalline structure is a well-known phenomenon in complex plasmas. In most experiments, the pressure and rf power are the main controlling parameters in determining the phase of the system. Here, we have studied the effect of the externally applied magnetic field on the configuration of plasma crystals, suspended in the sheath of a radio-frequency discharge using the Magnetized Dusty Plasma Experiment device. Experiments are performed at a fixed pressure and rf power where a crystalline structure is formed within a confining ring. The magnetic field is then increased from 0 to 1.28 T. We report on the breakdown of the crystalline structure with the increasing magnetic field. The magnetic field affects the dynamics of the plasma particles and first leads to a rotation of the crystal. At a higher magnetic field, there is a radial variation (shear) in the angular velocity of the moving particles which we believe to lead to the melting of the crystal. This melting is confirmed by evaluating the variation of the pair correlation function as a function of magnetic field.

Authors:
 [1];  [2];  [2]; ORCiD logo [3];  [2]
  1. Deutsches Zentrum für Luft-und Raumfahrt (DLR), Weßling (Germany). Inst. für Materialphysik im Weltraum
  2. Auburn Univ., AL (United States). Allison Lab.
  3. Inst. for Plasma Research, Bhat, Gandhinagar (India)
Publication Date:
Research Org.:
Auburn Univ., AL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1514859
Alternate Identifier(s):
OSTI ID: 1408069
Grant/Contract Number:  
SC0010485; SC0016330
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 11; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Jaiswal, S., Hall, T., LeBlanc, S., Mukherjee, R., and Thomas, E. Effect of magnetic field on the phase transition in a dusty plasma. United States: N. p., 2017. Web. doi:10.1063/1.5003972.
Jaiswal, S., Hall, T., LeBlanc, S., Mukherjee, R., & Thomas, E. Effect of magnetic field on the phase transition in a dusty plasma. United States. https://doi.org/10.1063/1.5003972
Jaiswal, S., Hall, T., LeBlanc, S., Mukherjee, R., and Thomas, E. Wed . "Effect of magnetic field on the phase transition in a dusty plasma". United States. https://doi.org/10.1063/1.5003972. https://www.osti.gov/servlets/purl/1514859.
@article{osti_1514859,
title = {Effect of magnetic field on the phase transition in a dusty plasma},
author = {Jaiswal, S. and Hall, T. and LeBlanc, S. and Mukherjee, R. and Thomas, E.},
abstractNote = {The formation of a self-consistent crystalline structure is a well-known phenomenon in complex plasmas. In most experiments, the pressure and rf power are the main controlling parameters in determining the phase of the system. Here, we have studied the effect of the externally applied magnetic field on the configuration of plasma crystals, suspended in the sheath of a radio-frequency discharge using the Magnetized Dusty Plasma Experiment device. Experiments are performed at a fixed pressure and rf power where a crystalline structure is formed within a confining ring. The magnetic field is then increased from 0 to 1.28 T. We report on the breakdown of the crystalline structure with the increasing magnetic field. The magnetic field affects the dynamics of the plasma particles and first leads to a rotation of the crystal. At a higher magnetic field, there is a radial variation (shear) in the angular velocity of the moving particles which we believe to lead to the melting of the crystal. This melting is confirmed by evaluating the variation of the pair correlation function as a function of magnetic field.},
doi = {10.1063/1.5003972},
journal = {Physics of Plasmas},
number = 11,
volume = 24,
place = {United States},
year = {Wed Nov 08 00:00:00 EST 2017},
month = {Wed Nov 08 00:00:00 EST 2017}
}

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Free Publicly Available Full Text
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Cited by: 12 works
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Figures / Tables:

FIG. 1 FIG. 1: (a) A schematic drawing of the interior of the MDPX plasma chamber and (b) a photograph of a plasma crystal suspended in the plasma.

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Works referencing / citing this record:

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