Radial transport with perturbed magnetic field

2015 ◽  
Vol 22 (5) ◽  
pp. 052501 ◽  
Author(s):  
R. D. Hazeltine
Keyword(s):  
Magnetic Field ◽  
Radial Transport ◽  
Perturbed Magnetic Field

scholarly journals Identification of mirror waves by the phase difference between perturbed magnetic field and plasmas

1998 ◽  
Vol 103 (A4) ◽  
pp. 6621-6631 ◽  
Author(s):  
C.-H. Lin ◽  
J. K. Chao ◽  
L. C. Lee ◽  
D. J. Wu ◽  
Y. Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Difference ◽  
Perturbed Magnetic Field

Helicity waves propagating in a plasma

1991 ◽  
Vol 45 (3) ◽  
pp. 481-488 ◽  
Author(s):  
Z. Yoshida
Keyword(s):  
Magnetic Field ◽  
Faraday Effect ◽  
Low Frequency ◽  
Plasma Waves ◽  
Frequency Limit ◽  
High Frequencies ◽  
Transverse Modes ◽  
Longitudinal Part ◽  
The Waves ◽  
Perturbed Magnetic Field

There exist plasma waves that transport helicity although they do not propagate electromagnetic energy. The dispersion relations of such helicity waves are studied. The electric field of the waves is parallel to the perturbed magnetic field, and both are perpendicular to the perturbed current. In cross-field propagation, a helicity wave is decomposed into two transverse modes with different polarizations and a longitudinal part. The helicity waves are principally Alfvénic in the low-frequency limit. At high frequencies, the Faraday effect comes into the polarization.

scholarly journals Magneto-thermoelastic waves in a perfectly conducting elastic half-space in thermoelasticity III

2005 ◽  
Vol 2005 (20) ◽  
pp. 3303-3318
Author(s):  
S. K. Roychoudhuri ◽  
Nupur Bandyopadhyay
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Wave Front ◽  
Half Space ◽  
Temperature Stress ◽  
Elastic Half Space ◽  
Small Time ◽  
Dilatational Wave ◽  
Heat Transport Equation ◽  
Perturbed Magnetic Field

The propagation of magneto-thermoelastic disturbances in an elastic half-space caused by the application of a thermal shock on the stress-free bounding surface in contact with vacuum is investigated. The theory of thermoelasticity III proposed by Green and Naghdi is used to study the interaction between elastic, thermal, and magnetic fields. Small-time approximations of solutions for displacement, temperature, stress, perturbed magnetic fields both in the vacuum and in the half-space are derived. The solutions for displacement, temperature, stress, perturbed magnetic field in the solid consist of a dilatational wave front with attenuation depending on magneto-thermoelastic coupling and also consists of a part diffusive in nature due to the damping term present in the heat transport equation, while the perturbed field in vacuum represents a wave front without attenuation traveling with Alfv'en acoustic wave speed. Displacement and temperatures are continuous at the elastic wave front, while both the stress and the perturbed magnetic field in the half-space suffer finite jumps at this location. Numerical results for a copper-like material are presented.

Perturbed magnetic-field phase slip for tokamaks

1980 ◽  
Vol 20 (1) ◽  
pp. 17-26 ◽  
Author(s):  
G. Vahala ◽  
L. Vahala ◽  
J.H. Harris ◽  
G. Bateman ◽  
B.V. Waddell ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Slip ◽  
Field Phase ◽  
Perturbed Magnetic Field

scholarly journals The Dynamics of Steady Hexagonal Magnetoconvection

1985 ◽  
Vol 38 (1) ◽  
pp. 41 ◽  
Author(s):  
JO Murphy ◽  
JM Lopez
Keyword(s):  
Magnetic Field ◽  
Steady State ◽  
Convection Zone ◽  
Dynamic Interaction ◽  
Vertical Magnetic Field ◽  
Divergent Flow ◽  
Type Layer ◽  
Convective Motions ◽  
Rayleigh Benard ◽  
Perturbed Magnetic Field

The dynamic interaction between an initially uniform vertical magnetic field and a Rayleigh-Benard type layer of convecting fluid is investigated under steady-state conditions. Particular attention is given to the roles of the dtffusivities in determining the extent to which a magnetic field is induced and convective motions inhibited. The model demonstrates how the perturbed magnetic field is generated at the base of the convection zone, which is a region of converging fluid flow, and is expelled from regions of divergent flow.

Analytical Solution of the Perturbed Magnetic Fields of Plates Under Tensile Stress

2008 ◽  
Vol 75 (3) ◽  
Author(s):  
Fei Qin ◽  
Dongmei Yan
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Analytic Solutions ◽  
Round Hole ◽  
Governing Equations ◽  
Displacement Gradient ◽  
Weak Magnetic Fields ◽  
Testing Technology ◽  
Perturbed Magnetic Field ◽  
The Magnetic Field

Development of magnetism based nondestructive testing technology and the Microelectronic mechanical system require accurate computation of perturbed magnetic fields generated by mechanical stress. In this paper, based on the linearized magnetoelastic theory, the governing equations and continuity conditions to determine the perturbed magnetic fields were formulated for the case of weak external magnetic fields such as the earth’s magnetic field. Under those weak magnetic fields, the effect of the magnetic fields on mechanical deformation was neglected. As a result, the interaction between the deformation and the magnetic field was simplified. The effect of deformation on the perturbed magnetic field was taken into account by introducing the displacement gradient into the boundary conditions that the perturbed field should satisfy. As examples, analytic solutions of the perturbed magnetic field of infinite plates with and without a round hole, which are subjected to tensile stresses and weak external magnetic fields, were obtained by the approach presented. The results show that the perturbed magnetic fields induced by stress are three orders less in magnitude of intensity than that of magnetic fields without stress, and some prominent local features such as that has more peaks and decays more rapidly in the radial direction than the case of stress free that are predicted by the solutions.

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