Computer Science – Performance
Scientific paper
Sep 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.540..669r&link_type=abstract
In: Proceedings of the 9th International Symposium on Materials in a Space Environment, 16-20 June 2003, Noordwijk, The Netherla
Computer Science
Performance
Space Environment, Materials
Scientific paper
Environmental monitoring pertains to the measurement of contaminants and other environmental factors within cleanrooms or cleanroom-type facilities (e.g. integration halls). There are many parameters which must be monitored within a cleanroom (temperature, humidity, pressure, etc.). Although these are not contaminants, they can affect the contaminant deposition on spacecraft systems and are often critical in determining the performance of the cleanroom system. The effects of relative humidity fluctuations on spaceflight hardware that are hygroscopic are well known within the contamination control community. Less is known about the effects of fluctuating relative humidity on molecular contamination deposition rates in a controlled environment. Within the last several years, a new type of ultrasensitive monitoring device, the Surface Acoustic Wave (SAW) measuring device, has been used within cleanrooms to monitor the build-up of airborne molecular contaminants. The SAW is able to detect and measure minute amounts of accretion. Observations made of SAW data from a wide variety of cleanrooms during spacecraft Integration and Test (I&T) activities suggest that there is a significant link between fluctuating relative humidity and clean facility background low Volatile Residue (LVR) and/or Non Volatile Residue (NVR) deposition rates.
Maag Carl R.
Rousseau Alex D.
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