MD Simulations of Dusty Plasma Crystal Formation: Preliminary Results

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In this paper we present some preliminary calculations of plasma crystal formation using molecular dynamics (MD) methods. A Yukawa potential is used to model the interaction of the charged grains shielded by the plasma, while an external potential is added to model effects imposed by the discharge. The external potential is based on the forces (electric, ion drag, gravity) experienced by charged grains in the trap regions and is modeled as a (asymmetric) Morse potential in the direction normal to the electrode. This is in contrast to the models that assume a parabolic potential. At present, our calculations do not ... continued below

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16 p.

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Murillo, M.S.; Hammerberg, J.E.; Holian, B.L.; Lapenta, G.M.; Shanahan, W.R. & Winske, D. December 31, 1997.

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In this paper we present some preliminary calculations of plasma crystal formation using molecular dynamics (MD) methods. A Yukawa potential is used to model the interaction of the charged grains shielded by the plasma, while an external potential is added to model effects imposed by the discharge. The external potential is based on the forces (electric, ion drag, gravity) experienced by charged grains in the trap regions and is modeled as a (asymmetric) Morse potential in the direction normal to the electrode. This is in contrast to the models that assume a parabolic potential. At present, our calculations do not include the effect of shielding due to ions streaming toward the electrodes. This process has been shown via particle orbit studies and crystal formation simulations that include ion dynamics to be a potentially important effect to explain the observed crystalline structure.

Physical Description

16 p.

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OSTI as DE98002654

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  • International conference on strongly coupled coulomb systems, Boston, MA (United States), 3-10 Aug 1997

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  • Other: DE98002654
  • Report No.: LA-UR--97-4163
  • Report No.: CONF-9708136--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 627179
  • Archival Resource Key: ark:/67531/metadc692578

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  • December 31, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • May 20, 2016, 2:56 p.m.

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Murillo, M.S.; Hammerberg, J.E.; Holian, B.L.; Lapenta, G.M.; Shanahan, W.R. & Winske, D. MD Simulations of Dusty Plasma Crystal Formation: Preliminary Results, article, December 31, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc692578/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.