Influence of static magnetic field on the instability of surface waves in layered ferrite/semiconductor structures with hot carriers

1994 ◽  
Author(s):  
R. G. Tarkhanian
Keyword(s):  
Magnetic Field ◽  
Surface Waves ◽  
Static Magnetic Field ◽  
Hot Carriers ◽  
Semiconductor Structures

INTRINSIC LOSS AT THE EDGES OF ANISOTROPIC PLASMAS

1963 ◽  
Vol 41 (10) ◽  
pp. 1554-1562 ◽  
Author(s):  
R. A. Hurd
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Field ◽  
Surface Waves ◽  
Static Magnetic Field ◽  
Isotropic Material ◽  
Anisotropic Plasma ◽  
Perfect Conductor ◽  
Metal Interface ◽  
Field Parallel ◽  
Intrinsic Loss

The electromagnetic field near the edge where three sectors meet is investigated. The three sectors are composed of anisotropic plasma, perfect conductor, and isotropic material. With the static magnetic field parallel to the edge, it is found that intrinsic loss occurs at the edge when the frequency lies in a certain range. The loss is found to be closely related to degenerate surface waves at the plasma–metal interface. The conditions under which these waves can exist are investigated. Comparisons are made with the ferrite case which was investigated previously.

The effect of gradients of density and static magnetic field on the propagation of surface waves and on wave–beam interaction

1973 ◽  
Vol 10 (3) ◽  
pp. 359-369 ◽  
Author(s):  
V. V. Demchenko ◽  
N. M. El-Siragy ◽  
A. M. Hussein
Keyword(s):  
Magnetic Field ◽  
Surface Wave ◽  
Surface Waves ◽  
Static Magnetic Field ◽  
Natural Frequencies ◽  
Propagation Constant ◽  
Inhomogeneous Plasma ◽  
Particle Beam ◽  
Charged Particle Beam ◽  
Axial Density

The propagation of slow surface waves in an inhomogeneous plasma is investigated. Both ‘axial’ and ‘radial’ density gradients n(r) and those of the static magnetic field B0 are taken into account. It is demonstrated that the axial in- homogeneities n(z) and B0(z) result in the dependence of the natural surface- wave frequencies on the ‘axial’ co-ordinate z. The dependence ωSW(z) affects the phase velocity νph = ωswsol;K where K iS the propagation constant. So, in the case of surface-wave excitation by a charged particle beam in an ‘axially’ inhomogeneous plasma, the Cherenkov resonance ωSW= KV0 between the beam and the surface waves breaks, thereby reducing the growth rate of unstable oscillations. This phenomenon might be considered as the stabilization of the beam by the ‘axial’ density gradient. It is also shown that the ‘radial’ gradients n0(r) and B0(r) essentially affect the surface-wave natural frequencies as well. Dispersion equations, expressions for the natural frequencies and growth rates are obtaind, taking into account the gradients of the density and the static magnetic field.

Decreased chemotaxis of human peripheral phagocytes exposed to a strong static magnetic field

2004 ◽  
Vol 91 (1) ◽  
pp. 59-65 ◽  
Author(s):  
S Sipka ◽  
I Szöllősi ◽  
Gy Batta ◽  
Gy Szegedi ◽  
Á Illés ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field

Intense Static Magnetic Field Induced Bone Growth in Vivo

1984 ◽  
Vol 3 (1) ◽  
pp. 223-234
Author(s):  
Frank Papatheofanis ◽  
Bill Fapatheofanls ◽  
Robert Ray
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field ◽  
Bone Growth

ABOUT UNIFORMITY OF THE PHENOMENOLOGY AND THE MATHEMATICAL DESCRIPTION OF SO-CALLED « JOINED» ACTION OF HAZARDS AND COMBINED TOXICITY (ON THE EXAMPLE OF A COMBIBATION OF THE FLUORIDE AND THE STATIC MAGNETIC FIELD)

2016 ◽  
pp. 13-20
Author(s):  
B. A. Katsnelson ◽  
M. P. Sutunkova ◽  
N. A. Tsepilov ◽  
V. G. Panov ◽  
A. N. Varaksin ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field ◽  
Point Of View ◽  
Whole Body ◽  
Surface Model ◽  
Combined Toxicity ◽  
Fluoride Solution ◽  
Adverse Action ◽  
Biochemical Indices ◽  
And Control

Sodium fluoride solution was injected i.p. to three groups of rats at a dose equivalent to 0.1 LD50 three times a week up to 18 injections. Two out of these groups and two out of three groups were sham-injected with normal saline and were exposed to the whole body impact of a 25 mT static magnetic field (SMF) for 2 or 4 hr a day, 5 times a week. Following the exposure, various functional and biochemical indices were evaluated along with histological examination and morphometric measurements of the femur in the differently exposed and control rats. The mathematical analysis of the combined effects of the SMF and fluoride based on the a response surface model demonstrated that, in full correspondence with what we had previously found for the combined toxicity of different chemicals, the combined adverse action of a chemical plus a physical agent was characterized by a tipological diversity depending not only on particular effects these types were assessed for but on the dose and effect levels as well. From this point of view, the indices for which at least one statistically significant effect was observed could be classified as identifying (I) mainly single-factor action; (II) additive unidirectional action; (III) synergism (superadditive unidirectional action); (IV) antagonism, including both subadditive unidirectional action and all variants of contradirectional action.

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