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Proceedings Paper

A ground calibration facility for HERSCHEL-SPIRE
Author(s): Patrick Andrew Collins; Peter A. R. Ade; Martin E. Caldwell; Marc Ferlet; Matthew J. Griffin; Peter C. Hargrave; Mark R. Harman; David L. Smith; Bruce Miles Swinyard
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Paper Abstract

We describe the requirements and the main design features of the ground test and calibration facility for the Herschel SPIRE instrument. SPIRE has a large cold focal plane unit (approx 700 x 400 x 400 mm) with several internal temperature stages, and is designed to operate in orbit viewing a low emissivity 80-K telescope. The calibration facility is designed to allow all aspects of instrument behaviour, performance, calibration, and optimisation of observing modes to be investigated under flight representative conditions. The facility includes the following features: - A large test cryostat replicating the in-orbit thermal environment - An external telescope simulator and sub-millimetre sources allowing the instrument to be fed with a beam that accurately simulates the beam from the Herschel telescope. - Internal cold black body for absolute radiometric and flat field calibration - Cold neutral density filters and an internal shutter for control of the photon background conditions - A far infrared laser used for spectral calibration of the SPIRE spectrometer channel and to present a source with well understood beam modes to the instrument. - An external FTS to characterise the spectral response of the instrument in both the camera and spectrometer channel The ground test facility will be used to evaluate the flight model before delivery and will also be used to house and carry out tests on the flight spare focal plane unit both before launch and during mission operations.

Paper Details

Date Published: 5 March 2003
PDF: 10 pages
Proc. SPIE 4850, IR Space Telescopes and Instruments, (5 March 2003); doi: 10.1117/12.461568
Show Author Affiliations
Patrick Andrew Collins, Cardiff Univ. (United Kingdom)
Peter A. R. Ade, Cardiff Univ. (United Kingdom)
Martin E. Caldwell, Rutherford Appleton Lab. (United Kingdom)
Marc Ferlet, Rutherford Appleton Lab. (United Kingdom)
Matthew J. Griffin, Cardiff Univ. (United Kingdom)
Peter C. Hargrave, Cardiff Univ. (United Kingdom)
Mark R. Harman, Rutherford Appleton Lab. (United Kingdom)
David L. Smith, Rutherford Appleton Lab. (United Kingdom)
Bruce Miles Swinyard, Rutherford Appleton Lab. (United Kingdom)

Published in SPIE Proceedings Vol. 4850:
IR Space Telescopes and Instruments
John C. Mather, Editor(s)

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