Results 181 to 190 of about 69,070 (213)
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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2023 IEEE World Haptics Conference (WHC), 2023 Hydraulic and pneumatic actuators in haptics offer the advantage of soft and compliant interfaces, with the drawback of cumbersome driving devices and limited modulation capabilities. We propose a miniature hydraulic actuator based on a linear electromagnetic motor with an embedded ferrofluid sealing.
Daniele Leonardis +2 more
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An optofluidic variable optical attenuator based on magnetohydrodynamic drive
SPIE Proceedings, 2016 With the development of optical communication, the optical attenuator becomes an important passive device. It is widely used in power equalization of DWDM system and photo detectors. Here an optofluidic variable optical attenuator (VOA) based on magnetohydrodynamic drive is presented.
Fenglan Xue +5 more
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Magnetohydrodynamic Microfluidic Drive of Ionic Liquids
Journal of Microelectromechanical Systems, 2014 Ionic liquids are increasingly attracting the attention of researchers in both academia and industry. However, research into ionic liquids is mainly limited in chemistry, and the electromagnetic characteristics and microfluidic/optofluidic applications of ionic liquids have been rarely studied.
Jing Wan +5 more
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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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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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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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Nonlinear magnetohydrodynamics of pulsed parallel current drive in reversed-field pinches
Physics of Plasmas, 2008 Nonlinear simulation with a simple resistive magnetohydrodynamics model is used to investigate the stabilization of magnetic fluctuations in reversed-field pinch plasmas subject to pulsed-parallel current drive. Numerical results are diagnosed with computations of nonlinear power transfer and by evaluating sequences of profiles for linear stability ...
J.M. Reynolds-Barredo +2 more
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Modification of magnetohydrodynamic activity by lower hybrid current drive
Physics of Fluids B: Plasma Physics, 1989 The effect of magnetic islands on the propagation of lower hybrid waves is investigated analytically for a model slab equilibrium with a single helical perturbation corresponding to an m=1 or m=2 island. From the variation of k∥ inside the island, the parallel current is estimated with the same pitch as the original perturbation.
F. Romanelli, A. Cardinali, R. Bartiromo
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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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