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Proceedings Paper

Operability assessment concept for the JWST/NIRSpec micro-shutter array (MSA)
Author(s): Timothy D. Rawle; Giovanna Giardino; Catarina Alves de Oliveira; Stephan M. Birkmann; Torsten Böker; Pierre Ferruit; Nora Lützgendorf; Patrick Ogle; Elena Puga; Marco Sirianni; Maurice Te Plate
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Paper Abstract

JWST/NIRSpec will include the first space-borne multi-object spectrograph, comprising a micro-shutter array (MSA) of a quarter of a million closable apertures that can be individually addressed to select up to a couple of hundred objects within a ~3.2x3.4 arcmin field of view. Although more than ~85% of the unvignetted shutters are fully operational, the high degree of mechanical movement combined with complex circuitry on a small scale, inevitably leads to some non-operable shutters. In this paper we present an overview of the operability assessment concept for the MSA, employed during both ground tests and in flight. We describe the procedures used to detect, mitigate against, and even repair the non-operable shutters, and show the effect upon the multiplexing capability and output data from NIRSpec. We also present the operability trending results from ground tests, and discuss the probable impact on nominal operations after launch.

Paper Details

Date Published: 6 July 2018
PDF: 13 pages
Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 106983Q (6 July 2018); doi: 10.1117/12.2311340
Show Author Affiliations
Timothy D. Rawle, European Space Agency c/o STScI (United States)
Giovanna Giardino, ATG Europe c/o ESA @ ESTEC (Netherlands)
Catarina Alves de Oliveira, European Space Agency c/o STScI (United States)
Stephan M. Birkmann, European Space Agency c/o STScI (United States)
Torsten Böker, European Space Agency c/o STScI (United States)
Pierre Ferruit, European Space Agency @ ESTEC (Netherlands)
Nora Lützgendorf, European Space Agency c/o STScI (United States)
Patrick Ogle, Space Telescope Science Institute (United States)
Elena Puga, European Space Agency c/o STScI (United States)
Marco Sirianni, European Space Agency c/o STScI (United States)
Maurice Te Plate, European Space Agency c/o STScI (United States)


Published in SPIE Proceedings Vol. 10698:
Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave
Makenzie Lystrup; Howard A. MacEwen; Giovanni G. Fazio; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

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