Results 191 to 200 of about 1,092,232 (226)
Nuclear Fusion, 2020 Abstract Energetic electrons driving low-frequency magnetohydrodynamic instabilities, e.g., electron fishbone (eFB) modes and electron beta-induced Alfvén eigenmodes (eBAEs), are found in co- and counter-current drive low hybrid current drive (LHCD) plasma in HL-2A, respectively. The eBAEs are found in LHCD plasma for the first time. Two
Liming Yu +22 more
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Induction-drive magnetohydrodynamic propulsion
Journal of Superconductivity, 1993 The use of magnetohydrodynamic propulsion for marine applications is reviewed with emphasis on induction-drive systems such as the “ripple” motor. Comparisons are made with direct-drive MHD propulsion systems. Application to pumps for hazardous fluids and liquid-metal coolants are also discussed.
D. L. Mitchell, D. U. Gubser
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Magnetohydrodynamic current drive for fusion confinement
IEEE Conference Record - Abstracts. 1999 IEEE International Conference on Plasma Science. 26th IEEE International Conference (Cat. No.99CH36297), 1999 Summary form only given, as follows. A closed current loop in a plasma is an effective means of confining plasma for fusion reactions, and is widely used in the tokamak and a variety of other toroidal systems. The problem is that the current loops are typically formed by induction, and therefore limited to pulsed operation.
G.B.K. Meacham, B.J. Quill
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Current drive via magnetohydrodynamic helicity waves
Physical Review Letters, 1989 We explore fundamentals of low-frequency current drive produced by a packet of arbitrarily polarized nonlinear shear Alfven waves in an infinite, uniform magnetized plasma. Analysis of the magnetohydrodynamic equations with resistivity and viscosity yields coupled nonlinear equations for the Alfven wave amplitude and an induced magnetic field ...
Richard R. Mett, J. A. Tataronis
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Current drive via magnetohydrodynamic helicity waves in a nonuniform plasma
Physics of Fluids B: Plasma Physics, 1990 Fundamentals of low-frequency current drive produced by a packet of arbitrarily polarized nonlinear Alfvén waves in an incompressible plasma with an inhomogeneous equilibrium magnetic field and aligned fluid velocity are explored. Analysis of the equations of magnetohydrodynamics with electrical conductivity and kinematic viscosity using an eikonal ...
Richard R. Mett, J. A. Tataronis
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Physics of Plasmas, 2010 A model which incorporates the effects of electron cyclotron current drive (ECCD) into the magnetohydrodynamic equations is implemented in the NIMROD code [C. R. Sovinec et al., J. Comput. Phys. 195, 355 (2004)] and used to investigate the effect of ECCD injection on the stability, growth, and dynamical behavior of magnetic islands associated with ...
Thomas G. Jenkins +4 more
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Physics of Plasmas, 2010 Three-dimensional simulations of field reversed configuration (FRC) formation and sustainment with rotating magnetic field (RMF) current drive have been performed with the NIMROD code [C. R. Sovinec et al., J. Comput. Phys. 195, 355 (2004)]. The Hall term is a zeroth order effect with strong coupling between Fourier components, and recent enhancements ...
R. D. Milroy, C. C. Kim, C. R. Sovinec
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Comment on ?Induction-drive magnetohydrodynamic propulsion?
Journal of Superconductivity, 1995 Expressions for the propulsion force and the electrical efficiency of the induction ripple motor are derived without making use of the geometric assumption in previous studies of this special magnetohydrodynamic drive.
A.J. Schoolderman
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Physics of Plasmas, 2000 A numerical model has been developed to study the use of a Rotating Magnetic Field (RMF) as an electron current drive mechanism for the formation and sustainment of a field-reversed configuration (FRC). Previous models assumed a fixed ion model, but here a full two-dimensional (r-θ) magnetohydrodynamic model has been developed.
R. D. Milroy
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Magnetohydrodynamic Simulation of Pulsed Poloidal Current Drive in Reversed Field Pinch Plasmas
Journal of the Physical Society of Japan, 2005 Numerical simulations using magnetohydrodynamic (MHD) equations are performed for the pulsed poloidal current drive (PPCD) in reversed field pinch (RFP) plasmas. The PPCD is simulated by reducing the toroidal magnetic field at the wall, B z ( a ), in the short period.
Hisao Ashida +2 more
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