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Simulation Studies of the Role of Reconnection in the ''Current Hole'' Experiments in the Joint European Torus

Description: Injection of lower-hybrid current drive into the current ramp-up phase of the Joint European Torus (JET) plasma discharges has been observed to produce an annular current distribution with a core region of essentially zero current density [Hawkes, et al., Phys. Rev. Lett. 87 (2001) 115001]. Similar ''current holes'' have been observed in the Japan Atomic Energy Research Institute (JAERI) Tokamak 60 Upgrade (JT-60U) plasma discharges with off-axis current drive supplied by the bootstrap current … more
Date: January 21, 2003
Creator: Breslau, J. A.; Jardin, S. C. & Park, W.
Partner: UNT Libraries Government Documents Department
open access

Nonlinear and Non-ideal Effects on FRC Stability

Description: New computational results are presented which advance the understanding of the stability properties of the Field-Reversed Configuration (FRC). We present results of hybrid and two-fluid (Hall-MHD) simulations of prolate FRCs in strongly kinetic and small-gyroradius, MHD-like regimes. The n = 1 tilt instability mechanism and stabilizing factors are investigated in detail including nonlinear and resonant particle effects, particle losses along the open field lines, and Hall stabilization. It is s… more
Date: October 21, 2002
Creator: Belova, E. V.; Davidson, R. C.; Ji, H. & Yamada, M.
Partner: UNT Libraries Government Documents Department
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