Characterization of Aerosol Inlets and Ducts

Abstract : During the first thirty days of the Phase I project, preliminary calculations were performed to determine the effect of inserting windows into the FSSP sample volume. Based on a first order approximation, the windows will displace the FSSP sample volume away from the collection optics by 0.217 mm. A more detailed analysis will be performed to determine how the scattered light collection angle will be affected by the windows. Altering the collection angle may require generating a different theoretical Mie curve to determine particle size. Work has started on the mechanical design of the inlet calibration device. Candidate sapphire windows have been located and plumbing fittings are being investigated. An appropriate scheme to translate the device is also in progress. The optical work and final mechanical design for the inlet calibration device will continue during the next period.