Journal article
Test of the Einstein Relation in Dusty Plasmas
IEEE transactions on plasma science, Vol.44(4), pp.483-486
04/2016
DOI: 10.1109/TPS.2015.2467966
Abstract
We test the Einstein relation Dp = μpkBTt that connects the diffusion coefficient Dp and mobility coefficient μp, where Tt is the temperature of particles that cause the scattering. The test is performed for a 3-D dusty plasma, using results from a Langevin Yukawa molecular dynamics simulation. The coefficients Dp and μp describe the motion of projectile dust particles drifting through a cloud of target particles of a different size due to a constant force. The drift is opposed by collisions with target particles and neutral atoms. The Einstein relation is found to be violated at high driving forces of order mpω2t a or stronger, where mp is the projectile mass, while ωt and a are the plasma frequency and Wigner-Seitz radius of the target particles. Because the Einstein relation fails at high forces, another relation is needed to describe diffusion in terms of mobility. We present a generalized Einstein relation, which we find to be satisfied over a wide range of forces.
Details
- Title: Subtitle
- Test of the Einstein Relation in Dusty Plasmas
- Creators
- Bin Liu - University of IowaJohn Goree - University of Iowa
- Resource Type
- Journal article
- Publication Details
- IEEE transactions on plasma science, Vol.44(4), pp.483-486
- DOI
- 10.1109/TPS.2015.2467966
- ISSN
- 0093-3813
- eISSN
- 1939-9375
- Grant note
- DOI: 10.13039/100000001, name: National Science Foundation; DOI: 10.13039/100000015, name: U.S. Department of Energy; DOI: 10.13039/100000104, name: National Aeronautics and Space Administration
- Language
- English
- Date published
- 04/2016
- Academic Unit
- Physics and Astronomy; Mechanical Engineering
- Record Identifier
- 9984199833002771
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