scholarly journals Electromagnetic Radiation from Electrons Rotating in an Ionized Medium Under the Action of a Uniform Magnetic Field

1958 ◽  
Vol 11 (3) ◽  
pp. 424 ◽  
Author(s):  
RQ Twiss ◽  
JA Roberts
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Electromagnetic Radiation ◽  
Fast Electron ◽  
Uniform Magnetic Field ◽  
Third Harmonic ◽  
Ordinary Mode ◽  
The Third ◽  
Velocity Of Light ◽  
Limiting Case

A theory is given for the radiation from a fast electron rotating, under the action of an external magnetic field, in an ionized plasma. It is shown that, although the radiation is emitted predominantly in the extraordinary mode, the ordinary mode is also weakly excited, even in the limiting case in which the density of the background plasma is vanishingly small. At the harmonics of the gyro frequency of the fast electron the power radiated in the ordinary mode is a few per cent. of that radiated in the extraordinary mode. This ratio is independent of v0,' the velocity of the fast electron, as long as V0 is sufficiently small compared with c, the velocity of light. However, at the fundamental gyro frequency the power radiated in the ordinary mode is lower by a factor than that radiated in the extraordinary mode and indeed is significantly smaller than that radiated, in either mode, at the third harmonic.

Observation of soft glassy behavior in a magnetic colloid exposed to an external magnetic field

Soft Matter ◽  
2020 ◽  
Vol 16 (30) ◽  
pp. 7126-7136
Author(s):  
Sithara Vinod ◽  
Philip J. Camp ◽  
John Philip
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Applied Field ◽  
Uniform Magnetic Field ◽  
Volume Fraction ◽  
High Rate ◽  
Glassy Behavior ◽  
Low Volume

Microstructures (viewed in a direction perpendicular and parallel to the applied field) responsible for soft glassy behavior in a ferrofluid of low volume fraction when a uniform magnetic field is applied at a sufficiently high rate.

IMPORTED CONFORMAL SYMMETRY OF ANYONS IN A UNIFORM MAGNETIC FIELD

1992 ◽  
Vol 06 (08) ◽  
pp. 1229-1242 ◽  
Author(s):  
T. AWAJI ◽  
M. HOTTA
Keyword(s):  
Magnetic Field ◽  
Quantum Mechanics ◽  
External Magnetic Field ◽  
Uniform Magnetic Field ◽  
Conformal Symmetry ◽  
Dynamical Symmetry ◽  
Conformal Group ◽  
Symmetry Consideration

We analyze an N-body quantum mechanics of anyons in an external magnetic field. It is pointed out that an SO(2, 1) dynamical symmetry, which is related to the conformal group, plays an important role in anyon dynamics. It is shown that the two-body spectrum is fully reproduced solely by the symmetry consideration. Moreover, we discuss some constraints on missing states from the symmetry consideration.

scholarly journals MODIFIED WAVE EQUATION FOR SPINLESS PARTICLES AND ITS SOLUTIONS IN AN EXTERNAL MAGNETIC FIELD

2013 ◽  
Vol 28 (06) ◽  
pp. 1350014 ◽  
Author(s):  
S. I. KRUGLOV
Keyword(s):  
Magnetic Field ◽  
Wave Equation ◽  
External Magnetic Field ◽  
Quantum Mechanical ◽  
Third Order ◽  
Modified Dispersion Relation ◽  
First Order ◽  
The Third ◽  
Uniform External Magnetic Field ◽  
Schrödinger Form

The wave equation for spinless particles with the Lorentz violating term is considered. We formulate the third-order in derivatives wave equation leading to the modified dispersion relation. The first-order formalism is considered and the density matrix is obtained. The Schrödinger form of equations is presented and the quantum-mechanical Hamiltonian is found. Exact solutions of the wave equation are obtained for particles in the constant and uniform external magnetic field. The change of the synchrotron radiation radius due to quantum gravity corrections is calculated.

Control for Optimized Air-Gap Magnetic Field of Five-Phase Induction Motor through Dual-Plane Asynchronous Rotation Transformation

2013 ◽  
Vol 347-350 ◽  
pp. 486-490
Author(s):  
Mu Yi Yin ◽  
Ling Zhang ◽  
Peng Zhu ◽  
Fei Guan
Keyword(s):  
Magnetic Field ◽  
Induction Motor ◽  
Flux Density ◽  
Mechanical Load ◽  
Air Gap ◽  
Linear Functions ◽  
Magnetic Flux Density ◽  
Third Harmonic ◽  
The Third ◽  
Air Gap Magnetic Field

This paper presents a control scheme with an optimized air-gap magnetic field for five-phase induction motor, the control objective is to generate a quasi-square magnetic flux density by the control of excitation and torque currents in the two planes. In this paper, the decoupling vector control model of five-phase induction motor in d1-q1-d3-q3 coordinate system is analyzed, and the direct and quadrature current components in the third harmonic plane as non-linear functions of the fundamental are built, which guarantee the air-gap magnetic to be a constant quasi-square waveform irrespective of the mechanical load, and then the third harmonic current injected method for improved air-gap magnetic field is proposed. Finally, the simulations by Matlab/Simulink and experiments are implanted on a 5.5 kW, five-phase concentrated full-pitch windings induction motor. The results indicate that the proposed method can satisfy the requirement of a quasi-square air-gap flux density, and the air-gap magnetic field gets improved.

Characteristics of Ultrasound Propagation in a Magnetic Fluid Under Uniform Magnetic Field

2003 ◽  
Author(s):  
Masaaki Motozawa ◽  
Tatsuo Sawada
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Fluid ◽  
Uniform Magnetic Field ◽  
Colloidal Particles ◽  
Magnetic Field Intensity ◽  
Magnetic Field Direction ◽  
Ultrasound Propagation ◽  
Ultrasonic Propagation ◽  
The Magnetic Field

When an external magnetic field is applied to a magnetic fluid, some of the colloidal particles coagulate and form chain-like clusters. Properties of ultrasonic propagation wave are changed by these chain-like clusters. We carried out measurement of the ultrasonic propagation velocity in a magnetic fluid. Measurement were made by changing the magnetic field intensity from 0 mT to 570 mT, and the angle between the magnetic field direction and direction of the ultrasound propagation from 0° to 180°. The ultrasound frequencies were 1 MHz, 2 MHz and 4 MHz. Some of experimental results for the characteristics of ultrasound propagation in a magnetic fluid under a uniform magnetic field were reported.

The Wannier Functions of the Lattice Electron in a Uniform Magnetic Field

1966 ◽  
Vol 21 (10) ◽  
pp. 1577-1579 ◽  
Author(s):  
A. Jannussis
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Wave Vector ◽  
Free Electron ◽  
Vector Potential ◽  
Uniform Magnetic Field ◽  
Wannier Function ◽  
Wannier Functions ◽  
Uniform External Magnetic Field

In this paper a generalization of the WANNIER functions is performed for the case of the lattice electron moving in a uniform magnetic field.In the case of the free electron moving in a uniform external magnetic field, the WANNIER function may be obtained directly by the Schrauben-function, if the wave vector k is substituted by the vector potential — (1/c) A (ai).

RADIATIVE DECAY OF A MASSIVE NEUTRINO IN THE WEINBERG–SALAM MODEL WITH MIXING IN A CONSTANT UNIFORM MAGNETIC FIELD

1996 ◽  
Vol 11 (39n40) ◽  
pp. 3119-3126 ◽  
Author(s):  
V. CH. ZHUKOVSKY ◽  
P.A. EMINOV ◽  
A.E. GRIGORUK
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Neutrino Mass ◽  
Uniform Magnetic Field ◽  
Radiative Decay ◽  
Decay Process ◽  
Linearly Polarized ◽  
Free Case ◽  
Neutrino Decay ◽  
Broad Region

Influence of an external magnetic field on the neutrino decay process with emission of a linearly polarized photon is considered. The decay rate is shown to be enhanced as compared to the free case in the broad region where both the nonvanishing neutrino mass and the field make substantial contributions. In the limit of a negligible neutrino mass the emitted photons are totally linearly polarized, which may help in the identification of these photons.

scholarly journals The Statistical Properties of Spin-One DKP Oscillator under an External Magnetic Field in Noncommutative Space

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
S. Hassanabadi ◽  
M. Ghominejad
Keyword(s):  
Magnetic Field ◽  
Thermal Properties ◽  
External Magnetic Field ◽  
Uniform Magnetic Field ◽  
Statistical Properties ◽  
Noncommutative Space

The spin-one Duffin-Kemmer-Petiau oscillator in uniform magnetic field is studied in noncommutative formalism. The corresponding energy is obtained and thereby the corresponding thermal properties are obtained for both commutative and noncommutative cases.

Plasmonics NanoSensor

2009 ◽  
Vol 74 ◽  
pp. 13-16
Author(s):  
E.H. Khoo ◽  
Ping Bai ◽  
M.X. Gu ◽  
H.S. Chu ◽  
W.B. Ewe ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Refractive Index ◽  
Electromagnetic Wave ◽  
External Magnetic Field ◽  
Field Distribution ◽  
The Third ◽  
First Case ◽  
Resonance Frequencies ◽  
Electron Holes ◽  
Metallic Waveguide

This paper presents a number of plasmonics based nanosensors that is currently being investigated in IHPC. In the first case, the influence of external magnetic field and electron on the field distribution of active semiconductor microcavity with elliptical shape is studied. It is observed that high amount of electron pumped into the elliptical microcavity demonstrate the plasmonics field distribution, which can be used to sense the change in wavelength and electron/holes densities. The second case will discuss about using plasmonics to enhance the electromagnetic wave from metallic waveguide slot. The enhancement is more than 100 times and this is important for the generation of electron-holes pair in PIN based photo-detector. The third case will discuss using the metallic nanowire to sense different surrounding materials. The small differences in the refractive index of the surrounding materials show the different plasmonics resonance frequencies.

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