Relativistic phase fluctuations of beat wave accelerators and wakeless triple solitons

1989 ◽  
Vol 1 (9) ◽  
pp. 1866-1871
Author(s):  
T. Osuga ◽  
K. Mima ◽  
H. Takabe ◽  
T. Tajima
Keyword(s):  
Phase Fluctuations ◽  
Relativistic Phase

Interferential seeing monitor, a seeing monitor for atmospheric turbulence studies: calibration with the differential image motion monitor

2020 ◽  
Vol 500 (2) ◽  
pp. 1884-1888
Author(s):  
Mohammed Sabil ◽  
A Habib ◽  
Z Benkhaldoun
Keyword(s):  
Structure Function ◽  
Atmospheric Turbulence ◽  
Wave Structure ◽  
Image Motion ◽  
Phase Fluctuations ◽  
Amplitude Fluctuations ◽  
Focus Plane ◽  
Cross Calibration ◽  
Double Slit ◽  
Good Agreement

ABSTRACT In this work, we aim to calibrate an interferential seeing monitor (ISM), which is a testing instument used at astronomical sites. Its method is based on the study of the diffraction pattern produced by a Young’s double-slit at the focus plane of a telescope. This method allows us to obtain the wave structure function by taking into account both phase and amplitude fluctuations of the light wavefront. A phase seeing εϕ was assigned to phase fluctuations and an amplitude seeing εχ was assigned to amplitude fluctuations (scintillation phenomenon), which allows us to obtain both phase and amplitude fluctuations. The feasibility of the ISM method was demonstrated by numerical simulations presented in a previous work. In this work, we have conducted a cross-calibration campaign of the ISM with a differential image motion monitor (DIMM) over 16 nights at the Oukaimeden and Atlas Golf Marrakech Observatories. The goal of this campaign was to study the reliability of this new method. In this paper, we present the calibration measurements and a comparison between the seeing measured by the ISM (εϕ, εχ) and that obtained by the DIMM (εdimm). These results show good agreement between the phase- eeing εϕ and εdimm.

scholarly journals Phase fluctuations in Bose–Einstein condensates

2001 ◽  
Vol 73 (8) ◽  
pp. 781-789 ◽  
Author(s):  
D. Hellweg ◽  
S. Dettmer ◽  
P. Ryytty ◽  
J.J. Arlt ◽  
W. Ertmer ◽  
...  
Keyword(s):  
Phase Fluctuations ◽  
Bose Einstein
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