Rapid measurement of sub-micrometer aerosol size distribution using a fast integrated mobility spectrometer

摘要

Rapid measurement of submicron particle size distributions enables the characterization of aerosols with fast changing properties, and is often necessary for measurements onboard mobile platforms (e.g., research aircraft). Aerosol mobility size distribution is commonly measured by a scanning mobility particle sizer (SMPS), which relies on voltage scanning or stepping to classify particles of different sizes, and may take about 1 minute or longer to obtain a complete size spectrum of aerosol particles. The recently developed fast integrated mobility spectrometer (FIMS) with enhanced dynamic size range separates and detects particles from 10 to similar to 600 nm simultaneously, allowing submicron aerosol mobility size distributions to be captured at a time resolution of 1 s.