26 September 2013 Pressure and temperature stabilization of an existing Échelle spectrograph IV
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Abstract
Since 2009 the Echelle spectrograph FOCES1 is located at the laboratories of Munich University Observatories under pressure and temperature stabilized conditions. It is intended to be operated at the 2.0m Fraunhofer Telescope at the Wendelstein Observatory and it will remain under lab conditions in Munich until the telescope is fully commissioned. This has given us the unique opportunity to use FOCES as a test bed for a number of different stability issues related to high precision radial velocity spectroscopy, in particular to study spectrograph stability, illumination stability and fiber transport stability. In this paper will be presented the final optical measurement results to test temperature and pressure stabilization in the spectrograph environment with respect to simulations requirements previously published. Using measurements done by a ThAr gas discharge source, we tested the stability of our system by direct 1D spectra analysis and we verified the movement of the spot positions by changing the CCD temperature in the stabilized environment.
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Anna Brucalassi, Anna Brucalassi, Frank Grupp, Frank Grupp, Florian Lang, Florian Lang, Liang Wang, Liang Wang, Christian Franik, Christian Franik, Hanna Kellerm, Hanna Kellerm, Shao Ming Hu, Shao Ming Hu, Ulrich Hopp, Ulrich Hopp, Ralf Bender, Ralf Bender, } "Pressure and temperature stabilization of an existing Échelle spectrograph IV", Proc. SPIE 8864, Techniques and Instrumentation for Detection of Exoplanets VI, 88641H (26 September 2013); doi: 10.1117/12.2023274; https://doi.org/10.1117/12.2023274
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