From Event: SPIE Optical Engineering + Applications, 2016
The current method for the prediction of molecular contamination build up in systems such as the James Webb Space Telescope and other large astronomical satellites is based on a monotonic linear model of accumulation. Recent long term observations carried out at Northrop Grumman show that the linear monotonic model over predicts thickness of the molecular film. This paper reviews the long term observations of contaminant film thickness accumulation made at Northrop Grumman facilities. The formulation of a semi-empirical method for the prediction of film thickness evolution consistent with both observation and first principles is discussed in detail. The paper concludes with a validation of the predictions of the semi-empirical model. The increased accuracy of the semi-empirical method holds the promise of improved and more effective means of contamination control, thus reducing mission cost and risk.
Jonathan W. Arenberg, Matthew Macias, and Ricardo C. Lara, "A semi-empirical method for the prediction of molecular contaminant film accumulation
(Conference Presentation)," Proc. SPIE 9952, Systems Contamination: Prediction, Control, and Performance 2016, 995202 (Presented at SPIE Optical Engineering + Applications: August 31, 2016; Published: 7 November 2016); https://doi.org/10.1117/12.2237795.5169178133001.
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