The paper presents the results of measurements of characteristics of local astroclimate in special production areas of the Large solar vacuum telescope (the Baikal astrophysical observatory of the Institute of Solar-Terrestrial Physics SB RAS). It is demonstrated that the temperature gradients in the telescope rooms are the cause of the initiation of the Benard cell and originating (incipient) turbulence in the pavilion of the astronomical spectrograph. The characteristics of the originating turbulence were studied in detail. It has been found that the measurements date have supported the basic scenarios of stochastization (Landau-Hopf, Ruelle-Takens, Feigenbaum, Pomeau-Menneville scenarios). The Feigenbaum bifurcation diagram has experimentally been supported. It is shown that the basic vortex in Benard cell breaks down into smaller vortices as the result of ten bifurcations of the period duplication. It has been found that the originating turbulence introduced large errors in the data of spectral measurements, even at the path of small length. The horizontal random displacements of spectral lines, appearing due to the pavilion effects, in the horizontal Ebert scheme can reach 1 second of arc. In this case the line displacements occur slowly, at the frequency about 0.01 Hz. Because of low frequencies of line displacements the originating turbulence by its optical characteristics approximated the regular refraction.

Date Published: 22 April 2008
PDF: 11 pages
Proc. SPIE 6936, Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 69360P (22 April 2008); doi: 10.1117/12.783158

Published in SPIE Proceedings Vol. 6936:
Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics
Gennadii G. Matvienko; Victor A. Banakh, Editor(s)