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Friction force in strongly magnetized plasmas
David J Bernstein1, Trevor Lafleur2, Jérôme Daligault3
1Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa 52242, USA.
Physical Review. E
|November 20, 2020
Summary
In strongly magnetized plasmas, friction on charged particles has a new transverse component. This finding, confirmed by simulations, impacts particle motion and transport in various applications.
Area of Science:
- Plasma physics
- Computational physics
Background:
- Charged particles in plasma experience friction opposing their velocity.
- A recent prediction suggested an additional transverse friction component in strongly magnetized plasmas.
Purpose of the Study:
- To confirm the existence of the transverse friction component in magnetized plasmas.
- To investigate the dependence of this component on plasma coupling strength.
Main Methods:
- Molecular-dynamics simulations were employed.
- Simulations focused on strongly magnetized plasma conditions where gyrofrequency exceeds plasma frequency.
Main Results:
- The prediction of a transverse friction component was confirmed.
- The magnitude of the transverse component was found to increase with plasma coupling strength.
Conclusions:
- The study validates a new aspect of charged particle friction in strongly magnetized plasmas.
- This discovery has implications for understanding single-particle motion and macroscopic transport in astrophysical and laboratory plasmas.
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