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    The IRAC Shutter Mechanism: Residual Magnetism and the Rotary Solenoid (2002)
    In:  CASI
    Details
    Publication Date: 2013-08-27
    Description: The Infrared Array Camera (IRAC) Shutter mechanism was originally presented in the paper, 'A Low Power Cryogenic Shutter Mechanism for Use on Infrared Imagers' at the 34th Aerospace Mechanisms Symposium, May 2000. At that time, the shutter was believed to be performing flawlessly and there was every indication it would continue to do so. In early spring of 2001, the calibration shutter, a rotary solenoid designed to be fail-safe open, remained in a closed state with no power to the electromagnetic coils. The ensuing investigation, subsequent testing, proposed remedy, and lessons learned are the focus of this paper.
    Keywords: Instrumentation and Photography
    Type: Proceedings of the 36th Aerospace Mechanisms Symposium; 15-26; NASA/CP-2002-211506
    Format: application/pdf
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