April 15-17

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Abstracts

Author: Wendell Horton
Requested Type: Poster
Submitted: 2019-02-18 11:28:58

Co-authors: Toshiki Tajima,

Contact Info:
University of Texas at Austin
6501 Mesa Dr
Austin, Texas   78731
United States

Abstract Text:
Confinement experiments in the Tri Alpha Energy field-reversed magnetic toroidal plasma raise issues associated with the turbulent transport with or without a toroidal magnetic field. We derive equations for simulations of the Alfven-drift wave turbulence for comparing the high beta FRC plasma turbulence with weak versus vanishing toroidal magnetic fields.
Plasma with sufficiently high density and ion temperatures to produce fusion power generate complex 3D dynamics releasing the plasma ions before reaching ignition. In both the tokamak and stellarator the plasma thermal energy given by the plasma pressure p is limited by the onset of complex three-dimensional ballooning modes that overcome the stabilization by the shear Alfven waves. Extensive tokamak and stellarator databases validate low-plasma beta β = p/(B^2/2μ) limits for a variety of toroidal confinement plasmas geometries owing to the long connection length Lc = qR. The FRC has a short direct length Lc connection length that raises the critical plasma β = p/(B^2/2μ) to order - or greater than one - for FLR-Hall_MHD instability onset.

Comments:
Place in a Session with FRC [field reversed confinement] and mirror confined plasmas.