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Proceedings Paper

Design, build, and test of the NIRCam focal plane array housing
Author(s): Danielle Little; Michael Jacoby; Edwin Casco
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Paper Abstract

The Near Infrared Camera (NIRCam) instrument for NASA's James Webb Space Telescope (JWST) has an optical prescription which terminates at two focal plane arrays for each module. The instrument will operate at 35K after experiencing launch loads at ~293K and the focal plane array housings must accommodate all associated thermal and mechanical stresses, while keeping the FPAs aligned. The main purpose of the FPAH is to provide a stray light, contamination, and radiation shield to the Focal Planes. The design includes a fold mirror used to direct incoming light up to the detectors and mechanical support for the Application Specific Integrated Circuits (ASIC). A six degree of freedom shim is used to align the Focal Plane Assembly at the operating temperature of 35 Kelvin. This paper will provide an overview of the FPAH design including an update to the Fold Mirror design described in previous papers. Analysis and test results of the ambient temperature optical and vibration testing will be presented.

Paper Details

Date Published: 28 September 2011
PDF: 11 pages
Proc. SPIE 8150, Cryogenic Optical Systems and Instruments XIII, 81500G (28 September 2011); doi: 10.1117/12.896488
Show Author Affiliations
Danielle Little, Lockheed Martin Advanced Technology Ctr. (United States)
Michael Jacoby, Lockheed Martin Advanced Technology Ctr. (United States)
Edwin Casco, Lockheed Martin Advanced Technology Ctr. (United States)

Published in SPIE Proceedings Vol. 8150:
Cryogenic Optical Systems and Instruments XIII
James B. Heaney; E. Todd Kvamme, Editor(s)

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