A phase sensitive heterodyne polarimeter was installed on compact helical system ~CHS!. An HCN laser ~337 mm! and Schottky barrier diodes are used for the radiation source and for detection, respectively. By using a phase sensitive heterodyne scheme, the Faraday rotation angle can be measured from the phase variations caused by the phase difference between the rightand left-handed waves in the ...

We report the experimental observation of a light polarization rotation in vacuum in the presence of a transverse magnetic field. Assuming that data distribution is Gaussian, the average measured rotation is (3.9 ± 0.5) 10−12 rad/pass, at 5 T with 44000 passes through a 1 m long magnet, with λ = 1064 nm. The relevance of this result in terms of the existence of a light, neutral, spin-zero parti...

Measurements of the Faraday rotation of the cosmic microwave background radiation (CMBR) polarization could provide evidence for the existence of primordial magnetic fields. The Faraday rotation could also allow the study of some properties of these fields. In this paper, we calculate the angular dependence of the Faraday rotation correlator for different assumptions about the spectral index an...

Context. The forthcoming new-generation radio telescope SKA (Square Kilometre Array) and its precursors will provide a rapidly growing number of polarized radio sources. Aims. Our analysis looks at what can be learned from these sources concerning the structure and evolution of magnetic fields of external galaxies. Methods. Recognition of magnetic structures is possible from Faraday rotation me...

The influence of both photochromic doping and photochromic transitions on the effect of magnetooptical rotation (Farady effect FE) of undoped and doped with Cr, Mn and Cu Bi 12 SiO 20 (BSO) and Bi 12 TiO 20 (BTO) crystals is studied. The present results show, that Cr, Mn and Cu increase the FE. The influence of Cr, whose affect on the optical activity (OA) of BSO is most significant, here is to...

It is shown that the Faraday ratation of a linexly polarized electromagnetic wave probing a helicalaxis-stellamtor plasma is a useful electron density diagnostic. The twisted magnetic geometry results in a large magnetic field component in the vettinl plane that is asumed to contain the probe beam(s). As a result, significant polarization rotations result for far-infrared beams traversing plasm...

The Parkes Galactic Meridian Survey (PGMS) is a 5 × 90 strip to map the polarized synchrotron emission along a Galactic meridian from the Galactic plane down to the south Galactic pole. The survey is carried out at the Parkes radio telescope at a frequency of 2.3 GHz with 30 adjacent 8-MHz bands which enable Faraday Rotation studies. The scientific goal is twofold: (1) To probe the Galactic mag...

We discuss the single-polarization SAR imaging with the Faraday rotation (FR) taken into account. The FR leads to a reduction in the intensity of the received radar signal that varies over the signal length. That, in turn, results in a degradation of the image. In particular, the image of a point target may have its intensity peak split in the range direction. To distinguish between the cases o...

Self-organizing map (SOM) has been studied as a model of map formation in the brain cortex. However, the original model present several oversimplifications. For example, neurons in the cortex present a refractory period in which they are not able to be activated, restriction that should be included in the SOM if a better model is to be achieved. Although several modifications have been studied ...