Study of the local optical turbulence in a 1.5m telescope dome with the INTENSE instrument

Optical systems performances can be affected by local optical turbulence created by its surrounding environment (telescope dome, clean room, atmospheric surface layer). We present recent measurements of the local turbulence inside the 1.5m M´eO telescope dome at Calern observatory (France) with the INTENSE (INdoor TurbulENce SEnsor) instrument. Relationships between the dome turbulence and the local meteorological measurements (temperature, pressure, wind speed and direction) are investigated. The impact of the local dome turbulence on the seeing at the focal plane of the 1.5 m telescope is highlighted.

[1]  M. Sarazin,et al.  The ESO differential image motion monitor , 1990 .

[2]  J. Conan,et al.  Wave-front temporal spectra in high-resolution imaging through turbulence , 1995 .

[3]  Julien Borgnino,et al.  Theoretical spatiotemporal analysis of angle of arrival induced by atmospheric turbulence as observed with the grating scale monitor experiment , 1997 .

[4]  Y. Fanteı̈-Caujolle,et al.  Optical turbulence in confined media. Part II:first results using the INTENSE instrument. , 2017, Applied optics.

[5]  Eric Aristidi,et al.  A new generalized differential image motion monitor , 2014, Astronomical Telescopes and Instrumentation.

[6]  Andrei Tokovinin,et al.  From Differential Image Motion to Seeing , 2002 .

[7]  Y. Fanteı̈-Caujolle,et al.  Optical turbulence in confined media: part I, the indoor turbulence sensor instrument. , 2016, Applied optics.

[8]  Lorenzo Zago.  Engineering handbook for local and dome seeing , 1997, Other Conferences.

[9]  A. Berdja,et al.  First results on dome turbulence characterisation using the LOTUCE prototype , 2013 .

[10]  Julien Borgnino,et al.  LOTUCE : A new monitor for turbulence characterization inside telescope ’ s dome , 2013 .

[11]  F Roddier,et al.  On the origin of speckle boiling and its effects in stellar speckle interferometry , 1982 .

[12]  Aziz Ziad,et al.  The Calern atmospheric turbulence station , 2016, Astronomical Telescopes + Instrumentation.

[13]  Marc S. Sarazin,et al.  Experimental characterization of the turbulence inside the dome and in the surface layer , 2012, Other Conferences.