Contamination Control Plan

Based on the DeMi CubeSat contamination control plan by MIT STAR Lab team members Ewan Douglas and Rachel Morgan (MIT)

NASA source document: NASA Marshall Contamination Control of Space Optical Systems (also from

Examples: Hanford Contamination Control Update 2

References: Morzinski, Katie M., Andrew P. Norton, Julia W. Evans, Layra Reza, Scott A. Severson, Daren Dillon, Marc Reinig, Donald T. Gavel, Steven Cornelissen, and Bruce A. Macintosh. 2012. “MEMS Practice: From the Lab to the Telescope.” In SPIE MOEMS-MEMS, 825304–825304.

Gushwa, K. E., & Torrie, C. I. (2014). Coming clean: understanding and mitigating optical contamination and laser induced damage in advanced LIGO. In G. J. Exarhos, V. E. Gruzdev, J. A. Menapace, D. Ristau, & M. Soileau (Eds.) (p. 923702). Presented at the SPIE Laser Damage, Boulder, Colorado, United States.


MEMS devices and optical components are particularly susceptible to contamination, thus:

Cleaning plan

Removing dust from previously cleaned parts

With DM removed the pass the part under the air knife at TBD PSI TBD times or until dust is removed to run air knife:

  1. check that the tube is connected to the nitrogen tank in SSL
  2. open silver top rightmost knob (amount doesn’t really matter)
  3. open pressure regulator knob to between 200-500 psi (middle knob, rightmost dial)
  4. open valve to 25 kPa slowly (leftmost valve, left dial) to shut off: close silver rightmost knob, wait for dials to go down to zero, close those valves


Humidity and Electrostatic Discharge

The payload is extremely sensitive to the conflicting hazards of electrostatic discharge and high humidity, requiring

The above humidity operational requirements can be met with a dry air purge, and low humidity ESD risks during assembly can be mitigated with a benchtop ionizer.