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Title: Action principle for Coulomb collisions in plasmas

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4962506· OSTI ID:1328855
 [1]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

In this study, an action principle for Coulomb collisions in plasmas is proposed. Although no natural Lagrangian exists for the Landau-Fokker-Planck equation, an Eulerian variational formulation is found considering the system of partial differential equations that couple the distribution function and the Rosenbluth-MacDonald-Judd potentials. Conservation laws are derived after generalizing the energy-momentum stress tensor for second order Lagrangians and, in the case of a test-particle population in a given plasma background, the action principle is shown to correspond to the Langevin equation for individual particles.

Research Organization:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-09CH11466
OSTI ID:
1328855
Alternate ID(s):
OSTI ID: 1324488
Report Number(s):
5259; PHPAEN
Journal Information:
Physics of Plasmas, Vol. 23, Issue 9; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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