Closure of the single fluid magnetohydrodynamic equations in presence of electron cyclotron current drive [PDF]
Physics of Plasmas, 2014 In the presence of electron cyclotron current drive (ECCD), the Ohm's law of single fluid magnetohydrodynamics (MHD) is modified as ${\bf E} + {\bf v} \times {\bf B} = \eta( {\bf J} - {\bf J}_{\rm EC} )$.
Pratt, Jane, Westerhof, Egbert
core +8 more sources
Closure of the single fluid magnetohydrodynamic equations in presence of electron cyclotron current drive [PDF]
EPJ Web of Conferences, 2015 In the presence of electron cyclotron current drive (ECCD), the Ohm’s law of single fluid magnetohydrodynamics (MHD) is modified as E + v × B = η(J – JECCD).
Westerhof E., Pratt J., Ayten B.
doaj +3 more sources
Nonlinear magnetohydrodynamic modeling of current-drive-induced sawtooth-like crashes in the W7-X stellarator [PDF]
Physics of Plasmas, 2023 Sawtooth-like core electron temperature crashes have been observed in W7-X experiments with electron cyclotron current drive. We present nonlinear single-fluid magnetohydrodynamic simulations of this phenomenon using the newly developed stellarator modeling capability of the M3D-C1 code. The near-axis current drive gives rise to two ι = 1 resonances in
Yao Zhou, K. Aleynikova, N.M. Ferraro
semanticscholar +6 more sources
On the stabilization of neoclassical magnetohydrodynamic tearing modes using localized current drive or heating [PDF]
Physics of Plasmas, 1997 The effectiveness of using localized current drive or heating to suppress the formation and growth of neoclassical magnetohydrodynamic (MHD) tearing modes is addressed. The most efficient way to use an auxiliary current source is to cause current to flow in the same direction as the equilibrium bootstrap current and phase the current relative to the ...
C. C. Hegna, J.D. Callen
semanticscholar +4 more sources
Magnetohydrodynamic simulations of direct current helicity injection for current drive in tokamaks [PDF]
Physics of Plasmas, 1996 Magnetohydrodynamic (MHD) computations of direct current (DC) helicity injection for tokamak-like configurations show current drive with no ‘‘loop voltage’’ in a resistive, pressureless plasma. Self-consistently induced, hollow current profiles are unstable to resistive modes that partially relax the profile through the MHD dynamo mechanism.
C. R. Sovinec, S. C. Prager
semanticscholar +4 more sources
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
semanticscholar +4 more sources
Plasma pressure response to non-inductive current drive in axisymmetric visco-resistive magnetohydrodynamic steady states [PDF]
Journal of Plasma PhysicsWe investigate self-consistent, steady-state axisymmetric solutions of an incompressible tokamak plasma using a visco-resistive magnetohydrodynamic model. A key contribution of this work is the formulation of Poisson’s equation that governs the pressure profile. Our analysis reveals that the current modelling fails to produce realistic pressure levels.
Anna Krupka, Marie-Christine Firpo
semanticscholar +3 more sources
Comment on “Magnetohydrodynamic simulations of direct current helicity injection for current drive in tokamaks’’ [Phys. Plasmas 3, 1038 (1996)] [PDF]
Physics of Plasmas, 1997 We disagree with the conclusions of the previous paper because reaching negative conclusions about helicity injection current drive for tokamaks based on magnetohydrodynamic simulation is unjustified. (AIP)
T. R. Jarboe, B. A. Nelson, U. Shumlak
semanticscholar +4 more sources
The Phase Modulating Micro-Mover Based on the MHD/MET System in the Reference Arm of the Scanning Interferometer [PDF]
Micromachines, 2022 The possibility of using a magnetohydrodynamic drive (MHD) and amolecular-electronic transfer (MET) sensor as a single device for moving and precise control of the displacement of a movable mirror, which is part of a scanning interferometer, is ...
Sergey Kalenkov +4 more
doaj +2 more sources
Effects of the resonance modification by electron cyclotron current drive on the linear and nonlinear dynamics of energetic particle driven magnetohydrodynamics modes in Heliotron J [PDF]
Nuclear Fusion, 2023 Abstract This study investigates the effects of electron cyclotron current drive (ECCD) on the linear and nonlinear dynamics of energetic-particle (EP)-driven magnetohydrodynamics (MHD) instability (mode) in Heliotron J (HJ), using MEGA, a nonlinear hybrid EP-MHD simulation code.
P. Adulsiriswad +12 more
openalex +3 more sources