نتایج جستجو برای: faraday effect
تعداد نتایج: 1643879 فیلتر نتایج به سال:
Abstract We examine the rotation of the plane of polarization for linearly polarized light rays by the weak gravitational field of an isolated physical system. Based on the rotation of inertial frames, we review the general integral expression for the net rotation. We apply this formula, analogue to the usual electromagnetic Faraday effect, to some interesting astrophysical systems: uniformly s...
Context. Various observations of magnetic fields in the intra–cluster medium (ICM), most of the time restricted to cluster cores, point towards a field strength of a few μG (synchrotron radiation from radio relics and radio halos, inverse Compton radiation in X-rays and Faraday rotation measure of polarised background sources). Both the origin and the spatial structure of galaxy cluster magneti...
We present multi wavelength parsec-scale Faraday rotation measure properties of twenty active galactic nuclei, observed with the Very Long Baseline Array simultaneously at 1.4, 1.6, 2.2, 2.4, 4.6, 5.0, 8.1, 8.4 and 15.4 GHz in the full polarization mode. For the observed sources we construct Faraday rotation measure and Faraday-corrected linear polarization maps. Direction of electrical field i...
We are investigating novel techniques to obtain time-dependent magnetic field measurements in wire-array Z-pinches and X-pinches. An ideal method would be emission spectroscopy (Zeeman splitting of lines, for example, in the visible or VUV spectrum), as it would be entirely passive and non-perturbing. However, a spectroscopic method to determine the high magnetic fields present in megampere lev...
In superfluid He-B, the off-resonant coupling of the J = 2−, M = ±1 order parameter collective modes to transverse current excitations stabilizes propagating transverse waves with low damping for frequencies above that of the J = 2− modes. Right(RCP) and left circularly polarized (LCP) transverse modes are degenerate in zero field; however, a magnetic field with H||q lifts this degeneracy givin...
The possible use of the nonlinear Faraday effect for optical limitation of the laser power is investigated in a resonant Faraday medium placed between two crossed polarizers. The results are comparable with those obtained at strong magnetic fields as a result of the linear Faraday effect. Advantages of the method are the narrow bandwidth and the wide field of view. The investigations are intere...
The optical Faraday effect describes the rotation of linear polarization upon propagation through a medium in the presence of a longitudinal magnetic field. The effect arises from a different phase delay between the right and left handed polarization components of the light. In this paper we predict a Faraday effect for a completely different system: electron vortices. Free electron vortex stat...
2014 Dichroism and birefringence are studied for the case of a strong saturating laser and a linearly polarized weak probe laser interacting with a dilute gas. For linearly or circularly polarized saturating laser fields the optical analog of the Kerr or Faraday effect are obtained respectively. Two photon, Doppler-free polarization effects are studied for two and three level systems (J = 0 ~ J...
Michael Faraday first examined atomic spectra under the influence of a magnetic field in 1862 without much success. It would prove to be his final experimental attempt. Upon discovery of this fact, Pieter Zeeman again attempted the procedure in 1896, and was led to the startling conclusion that spectral lines seemed to split into multiple components in the presence of a magnetic field. Known as...
The capacity region for W(write) U(unidirectiona1)Mbemory) codes over an alphabet of size q, for three of the cases asdefined by Simonyi are derived. For the fourth case (encoder anddecoder not informed about the state) an achievable rate region isderived that is believed to be the capacity region. Index Tenns -Capacity, write unidirectional memory. I. INTRODUCIIONWrite-unid...
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