Sherwood 2015

Abstract Details

files Add files

status:file name:submitted:by:
approvedcallen_modtokplasmas.pdf2015-04-06 07:36:01Jsmes Callen

Modeling Of Tokamak Plasmas

Author: Jsmes D. Callen
Requested Type: Consider for Invited
Submitted: 2015-01-18 07:06:04


Contact Info:
University of Wisconsin
1500 Engineering Drive
Madison, WI   53706-1

Abstract Text:
It has become increasingly clear over the past two decades that the evolution and effects of the radial electric field (and hence, via the radial force balance, toroidal plasma flow) in small gyroradius tokamak plasmas needs to be considered simultaneously with density and temperature transport. This is particularly true for plasma responses due to 3-D magnetic field effects (flow screening inhibition of field penetration, model locking caused by resonant field errors, NTV, RMPs etc.) and in the edge (ion orbit losses, charge-exchange, flow screening of RMPs and RMP effects on electron transport etc.). Comprehensive, self-consistent determination of such effects requires a combination of extended MHD (for ensuring plasma macrostability and determination of the “equilibrium” magnetic field structure including dissipative reconnection near low order rational surfaces, amplification of 3-D field-induced low n stable kink/ballooning plasma responses at high beta etc.), self-consistent kinetic-based determination of “radial” (i.e., across axisymmetric flux surfaces) plasma transport fluxes in the slightly distorted toroidal magnetic geometry (for collision- and microinstability-induced transport), and simultaneous solution of the flux-surface-averaged radial plasma transport equations for plasma toroidal angular momentum density (and hence the radial electric field) in addition to the usual electron density, and electron and ion pressures. This presentation will discuss the logic involved in and comprehensive equations that need to be solved self-consistently in this approach toward the objective of developing a “predictive capability” for ITER plasmas. The basics of this approach were presented as part of a series of 2014 French Summer School lectures on “Fluid and transport modeling of plasmas,” which are available via . Research supported by U.S. DoE Office of Fusion Energy Sciences grant DE-FG02-86ER53218.


March 16-18, 2015
The Courant Institute, New York University