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Proceedings Paper

NICMOS cold-well displacement monitor: a portable Hubble simulator
Author(s): John Eric Mentzell; Malcolm B. McIntosh; John P. Schwenker; Rodger I. Thompson
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Paper Abstract

The anomalous motion of the near IR camera and multi-object spectrometer (NICMOS) detector arrays was originally discovered and characterized during ground optical testing, in a large, high fidelity Hubble Space Telescope (HST) simulator. To monitor the state of the cryo-mechanical system, as NICMOS traveled among several testing sties, a portable stimulus was needed. The cold-well displacement monitor (CDM) was quickly assembled from a very simple design. The 'cheaper, better, faster' approach proved to be a winner here. Off-the-shelf optics, a simplified interface to the instrument, and a limited set of requirements were used. After calibration against the large refractive aberration simulator/Hubble opto-mechanical simulator (RAS/HOMS), the CDM gave results of similar accuracy to RAS/HOMS. It became the primary tool for the difficult job of managing the NICMOS cryogen system up through launch.

Paper Details

Date Published: 21 August 1998
PDF: 9 pages
Proc. SPIE 3354, Infrared Astronomical Instrumentation, (21 August 1998); doi: 10.1117/12.317227
Show Author Affiliations
John Eric Mentzell, NASA Goddard Space Flight Ctr. (United States)
Malcolm B. McIntosh, Ball Aerospace & Technologies Corp. (United States)
John P. Schwenker, Ball Aerospace & Technologies Corp. (United States)
Rodger I. Thompson, Steward Observatory/Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 3354:
Infrared Astronomical Instrumentation
Albert M. Fowler, Editor(s)

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