4BOUNCE and VBOUNCE - Models for the study of contamination transport and dynamics

Details 4BOUNCE and VBOUNCE - Models for the study of contamination transport and dynamics 4BOUNCE and VBOUNCE - Models for the study of contamination transport and dynamics

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1754...25w&link_type=abstract

In: Optical system contamination: Effects, measurement, control III; Proceedings of the Meeting, San Diego, CA, July 23, 24, 199

Computer Science

Performance

Aerospace Environments, Spaceborne Telescopes, Spacecraft Contamination, Spacecraft Instruments, Transport Theory, Circular Cylinders, Field Of View, Lenses, Particle Size Distribution, Scattering, Vanes

Scientific paper

Once a particle is released into the telescope field-of-view, regardless of the phenomena responsible for dislodging it from the surface, it will move through the baffle tube volume until it either leaves the open end of the tube or strikes another surface. Upon impact with a surface the particle will either stick to it or rebound at some angle and with some associated energy loss. 4BOUNCE and VBOUNCE are codes which model contamination transport in spaceborne sensors. 4BOUNCE is a fast-running code which uses a smooth cylinder and parameterizes the effects of baffle vanes. VBOUNCE models all surfaces explicitly, including vanes. Both models are intended to track particles of various materials, mass and velocity combinations as they bounce within a sensor. Trade studies were made to identify the important parameters based on the output sensitivity to the varied parameter. The results of interest for contamination impact on sensor performance is the fraction of particles remaining within the sensor view as a function of time and mass.

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