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technical:building [2025/01/17 12:32] etiennetechnical:building [2025/01/17 13:00] (current) etienne
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 The THEMIS telescope is installed inside the upper part of a 22.5m long cylindrical tower. The frontal part of the telescope is closed by a sort of window which allows the telescope to be vacuum-sealed thus avoiding heavy temperature variations. A ~9m diameter dome protects the instrument. The THEMIS telescope is installed inside the upper part of a 22.5m long cylindrical tower. The frontal part of the telescope is closed by a sort of window which allows the telescope to be vacuum-sealed thus avoiding heavy temperature variations. A ~9m diameter dome protects the instrument.
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 +[[results:gallery:building | Visit THEMIS building image and media gallery]]
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 === Turbulence reduction === === Turbulence reduction ===
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 The 9m rotating dome has been [[https://www.eie.it/en/progetti/themis-project | designed and installed by EIE]]. Its main role is to protect the telescope from the winds, the rain and the snow and solar erosion, while allowing observations of the sky in any directions. The 9m rotating dome has been [[https://www.eie.it/en/progetti/themis-project | designed and installed by EIE]]. Its main role is to protect the telescope from the winds, the rain and the snow and solar erosion, while allowing observations of the sky in any directions.
 The dome has a spherical shape and it is divided into two parts: the rotating dome which rotates around the azimuth axis (dome lower part) and the rotating cap (the dome upper part) which rotates around the pseudo elevation axis with an inclination of 45°. The dome has a spherical shape and it is divided into two parts: the rotating dome which rotates around the azimuth axis (dome lower part) and the rotating cap (the dome upper part) which rotates around the pseudo elevation axis with an inclination of 45°.
-The rotating cap is provided with an aperture for the telescope observations. The combination of the azimuth and pseudo elevation rotations allows the aperture to follow the movements of the telescope with extreme precision. The building insulation is guaranteed by thermo-acoustic insulating panels, plus aluminum perforated sheets.+The rotating cap is provided with an aperture for the telescope observations. The combination of the azimuth and pseudo elevation rotations allows the aperture to follow the movements of the telescope with extreme precision. The building insulation is guaranteed by thermo-acoustic insulating panels, plus aluminium perforated sheets.
  
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-[[results:gallery:building | Visit THEMIS building image and media gallery]] 
  
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 +<a href="https://www.themis.iac.es/lib/exe/fetch.php?media=results:gallery:building:themis.jpg"><img src="https://www.themis.iac.es/lib/exe/fetch.php?media=results:gallery:building:themis.jpg" style="width:90%; height: auto;"></a></html> \\
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 +<html><video onloadedmetadata="this.muted = true" style="width:90%; height: auto;" controls autoplay loop><source src="https://www.themis.iac.es/lib/exe/fetch.php?media=results:gallery:building:themisbuilding_overview.mp4" type="video/mp4"></video></html> \\
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 </html> </html>
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technical/building.1737117166.txt.gz · Last modified: 2025/01/17 12:32 by etienne
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