scholarly journals THE RENORMALIZED STRONG TURBULENCE THEORY FOR THE LOW-FREQUENCY MAGNETIC FIELD AND THE ION ACOUSTIC WAVE EXCITED BY HIGH-FREQUENCY WAVE

1986 ◽  
Vol 35 (3) ◽  
pp. 283
Author(s):  
HE XIAN-TU
Keyword(s):  
Magnetic Field ◽  
Acoustic Wave ◽  
High Frequency ◽  
Low Frequency ◽  
Turbulence Theory ◽  
Ion Acoustic Wave ◽  
Frequency Wave ◽  
Strong Turbulence ◽  
Ion Acoustic ◽  
Frequency Magnetic Field

scholarly journals ANALYSIS OF HIGH-FREQUENCY C-CORE MAGNETIC FLUX LEAKAGES FOR BONE TUMOR WITH INDUCTION HEATING BY USING MULTI-COIL

2019 ◽  
Author(s):  
Metharak Jokpudsa ◽  
Supawat Kotchapradit ◽  
Chanchai Thongsopa ◽  
Thanaset Thosdeekoraphat
Keyword(s):  
Magnetic Field ◽  
High Frequency ◽  
Tumor Tissue ◽  
Low Frequency ◽  
Heat Energy ◽  
High Frequencies ◽  
Frequency Magnetic Field ◽  
High Frequency Magnetic Field ◽  
The Magnetic Field ◽  
Flux Leakage

High-frequency magnetic field has been developed pervasively. The induction of heat from the magnetic field can help to treat tumor tissue to a certain extent. Normally, treatment by the low-frequency magnetic field needed to be combined with magnetic substances. To assist in the induction of magnetic fields and reduce flux leakage. However, there are studies that have found that high frequencies can cause heat to tumor tissue. In this paper present, a new magnetic application will focus on the analysis of the high-frequency magnetic nickel core with multi-coil. In order to focus the heat energy using a high-frequency magnetic field into the tumor tissue. The magnetic coil was excited by 915 MHz signal and the combination of tissues used are muscle, bone, and tumor. The magnetic power on the heating predicted by the analytical model, the power loss density (2.98e-6 w/m3) was analyzed using the CST microwave studio.

Effect of magnetic field on propagation of nonlinear ion-acoustic wave

1976 ◽  
Vol 19 (5) ◽  
pp. 762 ◽  
Author(s):  
S. G. Tagare ◽  
A. S. Sharma
Keyword(s):  
Magnetic Field ◽  
Acoustic Wave ◽  
Ion Acoustic Wave ◽  
Ion Acoustic

Nonlinear ion acoustic wave in a pair-ion plasma in a uniform weak magnetic field

2015 ◽  
Vol 90 (4) ◽  
pp. 045604 ◽  
Author(s):  
Biplab Maity ◽  
Samiran Ghosh ◽  
R Bharuthram
Keyword(s):  
Magnetic Field ◽  
Acoustic Wave ◽  
Weak Magnetic Field ◽  
Ion Acoustic Wave ◽  
Ion Plasma ◽  
Ion Acoustic

Parametric decay of Langmuir waves in an electron beam-plasma system

1984 ◽  
Vol 31 (3) ◽  
pp. 465-475 ◽  
Author(s):  
Joseph E. Willett ◽  
Yildirim Aktas
Keyword(s):  
Electron Beam ◽  
Acoustic Wave ◽  
Numerical Study ◽  
Low Frequency ◽  
Plasma Electron ◽  
Langmuir Waves ◽  
Ion Acoustic Wave ◽  
Electrostatic Waves ◽  
Beam Plasma ◽  
Ion Acoustic

Backscattering of Langmuir waves from low-frequency electrostatic waves in a plasma traversed by an electron beam is studied. The analysis is based on the use of beam electron, plasma electron, and ion susceptibilities provided by kinetic theory. For the case of a warm electron beam, formulae are derived for the growth rate and threshold associated with resonant backscattering from an ion-acoustic wave modified by the presence of the beam. For the case of a cold electron beam, formulae are derived from the growth rates associated with resonant back-scattering from a modified ion-acoustic wave and from a higher-frequency beam-plasma mode. A numerical study of the effects of an electron beam on these parametric instabilities is included.

Stationary nonlinear interaction between high- and low-frequency waves and the generation of density cavities in a plasma

1977 ◽  
Vol 17 (2) ◽  
pp. 185-199 ◽  
Author(s):  
K. Baumgärtel ◽  
K. Sauer
Keyword(s):  
Nonlinear Interaction ◽  
High Frequency ◽  
Wave Equations ◽  
Normal Modes ◽  
Low Frequency ◽  
Cavity Depth ◽  
Ion Acoustic Wave ◽  
Frequency Wave ◽  
Coupled Wave Equations ◽  
Density Disturbance

The nonlinear interaction of a high-frequency wave (transverse or longitudinal) and an ion-acoustic wave in a homogeneous plasma is investigated. The waves are assumed to be simultaneously excited by two localized external sinusoidal disturbances with frequencies ω0 and ωS in the plasma. From the coupled wave equations a system of ordinary differential equations for the spatial change of the amplitudes of the interacting waves (including the primary frequencies ω0, ωS and the mixed frequencies ω0±ωS) and a zero-frequency density disturbance is derived. The spatial development of the high-frequency amplitudes is characterized by localized regions of high intensities, coupled with local depressions of the plasma density. The influence of the initial amplitudes and the frequencies ω0, ωS on the maximum of the primary high-frequency amplitude and the ‘cavity’ depth is shown. The numerical results are compared with conclusions from a simplified model of three resonantly interacting normal modes.

Excitation of an ion-acoustic wave by two whistlers in a collisionless magnetoplasma

1981 ◽  
Vol 25 (2) ◽  
pp. 255-265 ◽  
Author(s):  
M. S. Sodha ◽  
Tarsem Singh ◽  
D. P. Singh ◽  
R. P. Sharma
Keyword(s):  
Magnetic Field ◽  
Acoustic Wave ◽  
Static Magnetic Field ◽  
Ponderomotive Force ◽  
Wave Power ◽  
Ion Acoustic Wave ◽  
Ion Density ◽  
Ion Acoustic

This paper presents an investigation of the excitation of an ion-acoustic wave in a collisionless hot magnetoplasma by two whistlers. On account of the interaction of the two whistlers, of frequencies ω1 and ω2, ponderomotive force at frequency △ ω(= ω1 – ω2) leads to the generation of an ion-acoustic wave. When the two whistlers have initially Gaussian intensity distributions, a d.c. component of the ponderomotive force leads to the redistribution of the background electron/ion density, and cross-focusing of the whistlers occurs. The power of the generated ion-acoustic wave, being dependent on the background ion density and powers of the whistlers, is further modified. The ion-acoustic wave power also changes drastically with the strength of the static magnetic field.

Sign in / Sign up

Export Citation Format

Share Document