report results of five investigations covering two - fluid dynamos, toroidal nonlinear MHD computation, nonlinear computation of Oscillating Field Current Drive (O FCD), the effect of shear flow on tearing instability, and the effect of pressure on resistive instability. The key findings are (1) two - fluid dynamo arising from the Hall term is much larger than the standard MHD dynamo present in a single - fluid treatmen t, (2) geometric coupling from toroidicity precludes the occurrence of nested helical flux surfaces, except for nonreversed plasmas, (3) OFCD, a form of AC helicity injection, can sustain the RFP plasma current, although magnetic fluctuations are enhanced, (4) edge shear flow can destabilize the edge resonant m = 0 modes, which occur as spikes in experiment, and (5) pressure driven modes are resistive at low beta, only becoming ideal at extremely high beta.

Two-Fluid And Nonlinear Effects Of Tearing And Pressure-Driven Resistive Modes In Reversed Field Pinches / V. V., Mirnov; F., Ebrahimi; Gatto, Renato; C. C., Hegna; S. C., Prager; C. R., Sovinec; P. W., Terry; J. C., Wright. - STAMPA. - (2002), p. TH/P2-08. (Intervento presentato al convegno International Atomic Energy Agency Fusion Energy Conference 2002 tenutosi a Lyon, France nel November 2002).

Two-Fluid And Nonlinear Effects Of Tearing And Pressure-Driven Resistive Modes In Reversed Field Pinches.

GATTO, RENATO;
2002

Abstract

report results of five investigations covering two - fluid dynamos, toroidal nonlinear MHD computation, nonlinear computation of Oscillating Field Current Drive (O FCD), the effect of shear flow on tearing instability, and the effect of pressure on resistive instability. The key findings are (1) two - fluid dynamo arising from the Hall term is much larger than the standard MHD dynamo present in a single - fluid treatmen t, (2) geometric coupling from toroidicity precludes the occurrence of nested helical flux surfaces, except for nonreversed plasmas, (3) OFCD, a form of AC helicity injection, can sustain the RFP plasma current, although magnetic fluctuations are enhanced, (4) edge shear flow can destabilize the edge resonant m = 0 modes, which occur as spikes in experiment, and (5) pressure driven modes are resistive at low beta, only becoming ideal at extremely high beta.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/533859
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