Measurement of Size, Concentration and Structure of Atmospheric Particulates by the Airborne Continuous Particle Replicator.

摘要

An assessment is made of the design characteristics of a continuous formvar cloud particle replicator for use on a pressurized aircraft such as the C130. Correction of measured replica particle concentrations is required depending on the siting of the instrument on the aircraft and the geometry of the collecting probe, to give free air concentration. A correction may also be required to the replica size to give the size of the particles prior to collection. Microscopy techniques for examination and photography of replica are described. Replica artifact results from coagulation, bounce, breakup and direct condensation of vapor. A simple technique is described for estimate of particle mass from the replica dimensions. (Author)