scholarly journals Electromagnetic radiation and the self torque of an oscillating magnetic dipole

2020 ◽  
Author(s):  
Masud Mansuripur ◽  
Per K. Jakobsen
Keyword(s):  
Electromagnetic Radiation ◽  
Magnetic Dipole ◽  
The Self

Electromagnetic radiation

2018 ◽  
Author(s):  
J. Pierrus
Keyword(s):  
Electromagnetic Radiation ◽  
Magnetic Dipole ◽  
Antenna Arrays ◽  
Electric Dipole ◽  
Free Electron ◽  
Vector Potential ◽  
Electric Quadrupole ◽  
Multipole Expansion ◽  
Multipole Moments

This chapter begins by expressing the multipole expansion of the dynamic vector potential A ( r, t) in terms of electric and magnetic multipole moments. Differentiation of A ( r, t) leads directly to the fields E ( r, t) and B ( r, t), which have a component transporting energy away from the sources to infinity. This component is called electromagnetic radiation and it arises only when electric charges experience an acceleration. A range of questions deal with the various types of radiation, including electric dipole and magnetic dipole–electric quadrupole. Larmor’s formula is applied in both its non-relativistic and relativistic forms. Also considered are some applications involving antennas, antenna arrays and the scattering of radiation by a free electron.

On the magnetic dipole absorption of electromagnetic radiation by a fine conducting particle

2004 ◽  
Vol 49 (12) ◽  
pp. 1605-1609 ◽  
Author(s):  
S. V. Berezkina ◽  
I. A. Kuznetsova ◽  
A. A. Yushkanov
Keyword(s):  
Electromagnetic Radiation ◽  
Magnetic Dipole ◽  
Conducting Particle

scholarly journals Electromagnetic radiation and the self-field of a spherical dipole oscillator

2020 ◽  
Vol 88 (9) ◽  
pp. 693-703
Author(s):  
Masud Mansuripur ◽  
Per K. Jakobsen
Keyword(s):  
Electromagnetic Radiation ◽  
The Self ◽  
Dipole Oscillator

scholarly journals Pulsar Spin-Down by 3P2 Superfluid Neutrons

2003 ◽  
Vol 214 ◽  
pp. 175-176
Author(s):  
Xin-Lian Luo ◽  
Qiu-He Peng ◽  
Ming Zhang ◽  
Chih-Kang Chou
Keyword(s):  
Magnetic Field ◽  
Neutron Star ◽  
Electromagnetic Radiation ◽  
Magnetic Dipole ◽  
Exponential Model ◽  
Radiation Model ◽  
Dipole Radiation ◽  
Field Decay ◽  
The Magnetic Field ◽  
Pulsar Evolution

To describe pulsar spin-down, a simple combined torque model, that takes into account both the standard magnetic dipole radiation and the electromagnetic radiation from the 3P2 superfluid vortex neutrons inside neutron star, is presented. Using an ordinary exponential model for the magnetic field decay, we investigate pulsar evolution tracks on the diagram, which is quite different from that of the standard magnetic dipole radiation model, especially when the superfluid torque or field decay become dominate.

scholarly journals Second-order equation of motion for electromagnetic radiation back-reaction

2017 ◽  
Vol 32 (27) ◽  
pp. 1750147
Author(s):  
T. Matolcsi ◽  
T. Fülöp ◽  
M. Weiner
Keyword(s):  
Dirac Equation ◽  
Electromagnetic Radiation ◽  
External Force ◽  
Equation Of Motion ◽  
Order Equation ◽  
Second Order ◽  
The Self ◽  
Back Reaction ◽  
Relativistic Regime ◽  
Self Force

We take the viewpoint that the physically acceptable solutions of the Lorentz–Dirac equation for radiation back-reaction are actually determined by a second-order equation of motion, the self-force being given as a function of spacetime location and velocity. We propose three different methods to obtain this self-force function. For two example systems, we determine the second-order equation of motion exactly in the non-relativistic regime via each of these three methods, leading to the same result. We reveal that, for both systems considered, back-reaction induces a damping proportional to velocity and, in addition, it decreases the effect of the external force.

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