Reconstruction of Refractive Indices from Spectral Measurements of Monodisperse Aerosols
For researchers studying two-component aerosols, this provides a method to obtain refractive indices under rigid environmental conditions, but the approach is incremental as it relies on existing FASP technology.
This work demonstrates that the FASP device can measure refractive indices of monodisperse aerosols needed for two-component aerosol studies, and determines required particle radii and measurement accuracy for sufficient quality.
For the investigation of two-component aerosols one needs to know the refractive indices of the two aerosol components. One problem is that they depend on temparature and pressure, so one needs for their determination a robust measurement instrument such as the FASP device, which can cope with rigid environmental conditions. In this article we show that the FASP device is capable of measuring the needed refractive indices, if monodisperse aerosols of the pure components are provided. We determine the particle radii of the monodisperse aerosols needed for this task and investigate how accurate the measurements have to be in order to retrieve refractive indices in a sufficient quality, such that they are suitable for investigations of two-component aerosols.