Clean Assembly Practices to Prevent Contamination and Damage to Optics

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A key lesson learned from the earliest optics installed in the National Ignition Facility (NIF) was that the traditional approach for maintaining cleanliness, such as the use of cleanrooms and associated garments and protocols, is inadequate. Assembly activities often negate the benefits provided by cleanrooms, and in fact generate contamination with high damage potential. As a result, NIF introduced ''clean assembly protocols'' and related practices to supplement the traditional clean room protocols. These new protocols included ''clean-as-you-go'' activities and regular bright light inspections. Introduction of these new protocols has greatly reduced the particle contamination found on more recently installed optics. ... continued below

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PDF-file: 11 pages; size: 7.7 Mbytes

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Pryatel, J & Gourdin, W H December 19, 2005.

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A key lesson learned from the earliest optics installed in the National Ignition Facility (NIF) was that the traditional approach for maintaining cleanliness, such as the use of cleanrooms and associated garments and protocols, is inadequate. Assembly activities often negate the benefits provided by cleanrooms, and in fact generate contamination with high damage potential. As a result, NIF introduced ''clean assembly protocols'' and related practices to supplement the traditional clean room protocols. These new protocols included ''clean-as-you-go'' activities and regular bright light inspections. Introduction of these new protocols has greatly reduced the particle contamination found on more recently installed optics. In this paper we will describe the contamination mechanisms we have observed and the details of the clean assembly protocols we have successfully introduced to mitigate them.

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PDF-file: 11 pages; size: 7.7 Mbytes

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  • Presented at: Boulder Damage Symposium, Boulder, CO, United States, Sep 20 - Sep 22, 2005

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  • Report No.: UCRL-CONF-217973
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 900456
  • Archival Resource Key: ark:/67531/metadc887427

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • December 19, 2005

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 22, 2016, 10:33 p.m.

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Pryatel, J & Gourdin, W H. Clean Assembly Practices to Prevent Contamination and Damage to Optics, article, December 19, 2005; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc887427/: accessed November 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.