Contamination

Members
Eric Miller (chair, Suzaku, Astro-H)
Andy Beardmore (Swift)
Larry David (Chandra)
Tadayasu Dotani (Astro-H)
Michael Freyberg (eROSITA)
Terry Gaetz (Chandra)
Catherine Grant (Chandra)
Kenji Hamaguchi (Suzaku)
Herman Marshall (Chandra)
Steve O'Dell (Chandra)
Paul Pluncinsky (Chandra)
Steve Sembay (XMM-Newton EPIC)
Doug Swartz (Chandra)
Masahiro Tsujimoto (Suzaku, Astro-H)
Cor de Vries (XMM-Newton RGS)
Qazuya Wada (Suzaku)

Topics
(with thanks to Herman M., Michael F., and Doug S.)
- comparison among instruments and missions
  - chemical composition
  - time dependence
  - spatial dependence (micron to cm scales)
  - temperature dependence (where is the coldest surface?)
  - environmental dependence (orbit)
- mitigation for current instruments
  - celestial monitoring targets
  - effects on calibration and science results
  - "bake-out" procedures
- mitigation for future instruments
  - design (cold traps, contamination blocking filters)
  - procurement
  - ground procedures
  - ground testing and calibration
  - on-orbit monitoring

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