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Proceedings Paper

Environmental Monitoring Data For The Hubble Space Telescope Cleanroom
Author(s): L. Aguilar; S. Kwan; M. Smith; J. Bush; J. Steakley; B. Kruse
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Paper Abstract

The Hubble Space Telescope (HST) was stored, during assembly and systems tests, in the Lockheed Sunnyvale Vertical Assembly and Test Area (VATA) cleanroom. This facility was designed and constructed as a Class 10,000 laminar flow cleanroom. Special emphasis was placed on operational constraints in order to meet the HST budget allocation allotted for both particulate and molecular contamination. We believe this is the first time that such a massive effort has been undertaken in the monitoring and control of molecular and particulate contaminants in a cleanroom environment. This paper discusses the VATA environmental monitoring data collectea during assembly and various HST tests. Collectively the air-borne particulate, environmental molecular and optical degradation data showed that the VATA was in compliance to the program require-ments. Particulate sampling included air-borne particulate (automatic particle counters) and fallout sampling (particle fallout plates). Molecular sampling included environmental hydrocarbon levels and species typing using a total hydrocarbon analyzer with flame ionization detector and gas chromatograph for species identification. Accumulation of organics on surfaces was evaluated using nonvolatile residue glass witness samples. The change in reflectance of magnesium fluoride coated glass optical mirrors were used to quantitatively establish the degradation to the HST optical surfaces.

Paper Details

Date Published:
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Proc. SPIE 0777, Optical Systems Contamination: Effects, Measurement, Control, ; doi: 10.1117/12.967090
Show Author Affiliations
L. Aguilar, Lockheed Missiles & Space Co. Inc. (United States)
S. Kwan, Lockheed Missiles & Space Co. Inc. (United States)
M. Smith, Lockheed Missiles & Space Co. Inc. (United States)
J. Bush, Lockheed Missiles & Space Co. Inc. (United States)
J. Steakley, Lockheed Missiles & Space Co. Inc. (United States)
B. Kruse, Lockheed Missiles & Space Co. Inc. (United States)


Published in SPIE Proceedings Vol. 0777:
Optical Systems Contamination: Effects, Measurement, Control
A. Peter M. Glassford, Editor(s)

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