Skip to main content
Viscous and induced current heating in plasma focus plasmoids
54th Annual Meeting of the APS Division of Plasma Physics, Providence, Rhode Island
  • Ahmad Talaei, Utah State University
  • Eric Lerner, Lawrenceville Plasma Physics, Inc.
Document Type
Publication Date
Recently, Abolhasani et al, proposed that the high ion energies observed in plasmoids formed in the plasma focus could be explained by viscous heating. We here elaborate this proposal, demonstrating that during plasmoid formation, ion motion along magnetic field lines can be rapidly converted, at least in part, to thermal energy through viscous diffusion. This effect is strongly enhanced by higher-z ions. We compare the theoretical predictions with the recent observation by Lerner et al, of trapped ion energies of 160 keV. In addition, we propose a second source of heating. The mildly relativistic electron beam emitted by the plasmoid, generates an induced current within the plasmoid comparable to the beam current and confined to approximately the same region. The induced current electrons, with drift velocity vde

Presentation given at the 54th Annual Meeting of the APS Division of Plasma Physics. Presentation slides are available for download through link above.

Citation Information
Ahmad Talaei and E. Lerner “Viscous and induced current heating in plasma focus plasmoids” Proceeding of 54th annual meeting of the APS division of plasma physics, vol. 57, No. 12, RI, USA, 2012