8 July 2014 Precise angular positioning at 6K: the FIFI-LS grating assembly
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Abstract
The Field Imaging Far Infrared Line Spectrometer (FIFI-LS) obtains spectral data within two wavelength ranges. The observed wavelengths are set by rotating the two diffraction gratings to specific angles. This paper describes on the grating assemblies, designed to rotate and stabilize the gratings. First the assembly itself and its special environment inside FIFI-LS is explained. Then a method is layed out how to monitor the performance of the drive and how to detect upcoming failures before they happen. The last chapter is dedicated to first inflight measurements of the position stability of the grating.
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Felix Rebell, Felix Rebell, Walfried Raab, Walfried Raab, Sebastian Colditz, Sebastian Colditz, Simon Beckmann, Simon Beckmann, Aaron Bryant, Aaron Bryant, Christian Fischer, Christian Fischer, Fabio Fumi, Fabio Fumi, Norbert Geis, Norbert Geis, Rainer Hönle, Rainer Hönle, Randolf Klein, Randolf Klein, Alfred Krabbe, Alfred Krabbe, Leslie Looney, Leslie Looney, Albrecht Poglitsch, Albrecht Poglitsch, Sarah Ragan, Sarah Ragan, Maureen Savage, Maureen Savage, } "Precise angular positioning at 6K: the FIFI-LS grating assembly", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 914735 (8 July 2014); doi: 10.1117/12.2055458; https://doi.org/10.1117/12.2055458
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