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.
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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
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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
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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
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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
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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
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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 is modified as E + v × B = η(J – JEC). This paper presents a new closure relation for the EC driven current density appearing in this modified Ohm's law.
E. Westerhof, J. Pratt
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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
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Response to “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 agree that additional effects (toroidicity, Hall and rotamak effects, and Lundquist number scaling) will alter the physics and magnetohydrodynamic simulation of HIT experiments. Future research will clarify the importance of these effects. (AIP)
C. R. Sovinec, S. C. Prager
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Chromospheric Jets and Their Properties [PDF]
Iranian Journal of Astronomy and Astrophysics, 2022 In this study we review solar chromospheric jets and characteristics of them. The chromosphere and transition region are the interface between the solar photosphere and the corona, which plays a key role in the formation and acceleration of the solar ...
Ehsan Tavabi, Sima Zeighami
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