Preliminary design of the PACS grating assembly for the FIRST mission

Details Preliminary design of the PACS grating assembly for the FIRST mission Preliminary design of the PACS grating assembly for the FIRST mission

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999spie.3759..189r&link_type=abstract

Proc. SPIE Vol. 3759, p. 189-204, Infrared Spaceborne Remote Sensing VII, Marija Strojnik; Bjorn F. Andresen; Eds.

Physics

1

Scientific paper

The Photoconductor Array Camera and Spectrometer (PACS) is an imaging spectro-photometer which forms part of the science payload of the Far InfraRed and Submillimeter Telescope (FIRST), an ESA cornerstone mission (CS4) to be launched in 2007. This paper reports the preliminary developments of the motorized grating assembly for the PACS spectrometer. The PACS grating shall be capable of accurate positioning (4 arcsec) within a large angular throw (40 arcdeg) in cryogenic environment (4 K). Technologies and trade-offs of grating manufacturing, actuators, pivots, position sensors, and servo- control are presented.

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