Light-beam deflection by cesium vapor in a transverse-magnetic field

1992 ◽  
Vol 17 (14) ◽  
pp. 1015 ◽  
Author(s):  
R. Schlesser ◽  
A. Weis

The alinement measurement technique previously developed for optical levers has been applied to an investigation of the constancy of the velocity of light in a transverse magnetic field in vacuo . The ‘noise’ in the alinement measurements made has an r. m. s. value of about 2 × 10 -11 rad, for an observing bandwidth of 1 c/s. The technique has been used to seek a change of direction of a light beam when traversing a ‘prism’ of transverse magnetic field. No change in the velocity of light appears to occur in a magnetic field of 8000 Oe, either for unpolarized light or for light plane polarized at 0, 45, or 90° to the magnetic field; the overall r. m. s. error of the investigation has been 2·3 parts in 10 13 , or about 70 μ /s.


2010 ◽  
Vol 46 (4) ◽  
pp. 393-402 ◽  
Author(s):  
F. Mokhtari ◽  
A. Bouabdallah ◽  
A. Merah ◽  
S. Hanchi ◽  
A. Alemany

2020 ◽  
Vol 58 (3) ◽  
pp. 400-409
Author(s):  
N. A. Luchinkin ◽  
N. G. Razuvanov ◽  
I. A. Belyaev ◽  
V. G. Sviridov

2019 ◽  
Vol 867 ◽  
pp. 661-690 ◽  
Author(s):  
Oleg Zikanov ◽  
Dmitry Krasnov ◽  
Thomas Boeck ◽  
Semion Sukoriansky

Decay of honeycomb-generated turbulence in a duct with a static transverse magnetic field is studied via direct numerical simulations. The simulations follow the revealing experimental study of Sukoriansky et al. (Exp. Fluids, vol. 4 (1), 1986, pp. 11–16), in particular the paradoxical observation of high-amplitude velocity fluctuations, which exist in the downstream portion of the flow when the strong transverse magnetic field is imposed in the entire duct including the honeycomb exit, but not in other configurations. It is shown that the fluctuations are caused by the large-scale quasi-two-dimensional structures forming in the flow at the initial stages of the decay and surviving the magnetic suppression. Statistical turbulence properties, such as the energy decay curves, two-point correlations and typical length scales are computed. The study demonstrates that turbulence decay in the presence of a magnetic field is a complex phenomenon critically depending on the state of the flow at the moment the field is introduced.


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