Ultrapure Water (UPW) Cleaning and Assembling of Genesis Mission Payload in ISO Class 4
2011
•Cleaned and assembled in ISO Class 4 room•UPW for cleaning is resistivity 18.2 MΩ-cm •Hardware cleaned to particle levels 25 to 50•Airborne molecular contamination measured by polished silicon witness plates – 10 ng/cm2•Minimal use of lubricants (applied with dental pick), lubricated parts were isolated from collectors•Closed in ISO Class 4, not opened again until on station at Earth-Sun L1
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