Section 7 Contamination

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Section 7 Contamination
. . . Dr. Michael Woronowicz Swales Aerospace
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Thermal Vacuum Parameters

• Plan to measure quantity, composition of products
  outgassed from within instruments
• TQCMs to measure outgassing rates throughout
  test
• Scavenger plates mounted to collect products
• Devices to be mounted to side of S/C
• Reduces risk of damaging instruments
• Single-sheet curtain of clear Kapton hung from
  nadir deck heater panels
• Together, form duct to isolate ALI, Hyperion
  outgassing from S/C

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Thermal Vacuum Parameters (continued)

• Advanced Land Imager
• TQCM operating at FPA temperature
• Scavenger plate operating at -90 C
• Hyperion
• TQCM, scavenger plate both operate at -90 C
• Scavenger plates operate at -90 C
• Same as shroud temperature
• Colder scavenger plates collect reflected
  material from S/C
• Cannot distinguish these materials from
  instrument outgassing
• Hyperion cryocooler operates at 150 K
• Will condense outgassed, desorbed water vapor
• Would overwhelm TQCM measurements, scavenger
  plates when operating with warmer shroud

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GSE Bakeout Status (as of 6/7/00)