Transforming any facility for meeting strict cleanliness requirements

Eve M. Wooldridge; Alan C. Abeel; Craig B. Jones; Kelly A. Henderson-Nelson; Joseph O. Ward; Elaine M. Stewart; Edwin W. Goldman; Jason E. Durner; Colette D. Lepage; Azuka J. Harbor

doi:10.1117/12.2637139

3 October 2022 Transforming any facility for meeting strict cleanliness requirements

Eve M. Wooldridge, Alan C. Abeel, Craig B. Jones, Kelly A. Henderson-Nelson, Joseph O. Ward, Elaine M. Stewart, Edwin W. Goldman, Jason E. Durner, Colette D. Lepage, Azuka J. Harbor

Author Affiliations +

Proceedings Volume 12224, Space Systems Contamination: Prediction, Control, and Performance 2022; 122240C (2022) https://doi.org/10.1117/12.2637139
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

Over the life of the James Webb Space Telescope (JWST), Integration & Test (I&T) has taken place in areas that needed considerable work to make the facility itself and/or the protocols used while working in the rooms suitable to meet JWST percent area coverage (PAC) and molecular accumulation requirements. In addition to normal particulate matter, JWST had a uniquely significant challenge: fibers! Fibers not only cause much higher PAC levels, but they also risk damaging the angstrom sized Near Infrared Spectrometer (NIRSpec) microshutter array (MSA), which is critical to NIRSpec instrument performance. The primary emphasis of this paper is to address particulate and fiber contamination. The success of the JWST mission required effective cleanrooms, protocols, and mitigations in non-cleanroom areas that were pressed into service to house contamination-sensitive optics and scientific instruments. Some presented profound challenges. These included: NASA’s 60-year-old Johnson Space Center (JSC) Chamber A, which had never been used for anything contamination-sensitive, and the European tropical launch facilities, which were designed to meet International Standard Organization (ISO) Class 8 processing for communication satellites. The final challenge for JWST, as if to stare us in the face and say, “I dare you to try and make me clean enough,” was preparing the 4 areas in the Centre Spatial Guyanais (CSG) Final Assembly Building (BAF) located in French Guiana, a building in which one entire side opens for Ariane 5 rocket ingress and egress. This paper will describe our initial evaluation processes and the actual work undertaken to transform even the most challenging areas into first class cleanrooms that met JWST particulate and fiber requirements.

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Eve M. Wooldridge, Alan C. Abeel, Craig B. Jones, Kelly A. Henderson-Nelson, Joseph O. Ward, Elaine M. Stewart, Edwin W. Goldman, Jason E. Durner, Colette D. Lepage, and Azuka J. Harbor "Transforming any facility for meeting strict cleanliness requirements", Proc. SPIE 12224, Space Systems Contamination: Prediction, Control, and Performance 2022, 122240C (3 October 2022); https://doi.org/10.1117/12.2637139

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