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

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.5003972· OSTI ID:1514859
 [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)

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.

Research Organization:
Auburn Univ., AL (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0010485; SC0016330
OSTI ID:
1514859
Alternate ID(s):
OSTI ID: 1408069
Journal Information:
Physics of Plasmas, Vol. 24, Issue 11; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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Cited By (7)

Laboratory space physics: Investigating the physics of space plasmas in the laboratory journal May 2018
Experimental observation of a dusty plasma crystal in the cathode sheath of a DC glow discharge plasma journal December 2018
Finite dust clusters under strong magnetic fields journal September 2019
Experimental investigation of test particle induced micro-structural changes in a finite two-dimensional complex plasma crystal journal October 2019
Dusty (complex) plasmas—routes towards magnetized and polydisperse systems journal February 2019
Melting transition of two-dimensional complex plasma crystal in the DC glow discharge journal June 2019
Laboratory Space Physics: Investigating the Physics of Space Plasmas in the Laboratory text January 2018

Figures / Tables (9)


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