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24 September 2012 LINC-NIRVANA, integration of an interferometric and cryogenic camera: first verification results
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Abstract
LINC-NIRVANA is an interferometric imaging camera, which combines the two 8.4 m telescopes of the Large Binocular Telescope (LBT). The instrument operates in the wavelength range from 1.1 μm to 2.4 μm, covering the J, H and K-bands. The beam combining camera (NIRCS) offers the possibility to achieve diffraction limited images with the spatial resolution of a 23 m telescope. This camera, which combines the AO corrected beams of both telescopes, is designed to deliver a 10 arcsec x 10 arcsec diffraction limited field of view. The optics and cryo-mechanics are designed for operation at 60 Kelvin. Equipped with a HAWAII-2 detector mounted on a rotation stage in order to compensate for the sky rotation, a filter wheel and a dichroic wheel to split the light into the science channel and the fringe tracking channel, the camera is fairly large and complex and requires certain features to be considered and tested. The verification of all these components follows a challenging AIV plan. We describe this AIV phase from initial integration of individual units to the final verification tests of the complete system. We report the performance of the cryogenic opto-mechanics and of the science detector. We also demonstrate the functionality of the cryo-mechanics and the cryo-cooling at sub-system level, which represents the current state of integration. Finally, we discuss key elements of our design and potential pros and cons.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter Bizenberger, Harald Baumeister, Armin Böhm, Tom Herbst, Armin Huber, Werner Laun, Ulrich Mall, Lars Mohr, Vianak Naranjo, Clemens Storz, and Jan Trowitzsch "LINC-NIRVANA, integration of an interferometric and cryogenic camera: first verification results", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 844647 (24 September 2012); doi: 10.1117/12.926990; https://doi.org/10.1117/12.926990
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