DEVELOPMENT OF AEROSOL CHARGE ANALYZER
Abstract
A technique was developed for measuring electrical mobility distribution of an aerosol and average effective size at each mobility level. An aerosol is passed through a purifier and a narrow mobility channel. The purifier removes charged particles from all but a thin central stream that enters the mobility chamber halfway between electrodes. Particles are deposited on an insulating surface according to their mobility. Total charge distribution on the walls was determined by a special scanning probe; mass distribution was determined by chemical or colorimetric analysis. Tests to determine mobility distribution of a uranine aerosol generated by atomizing and evaporating a dilute water solution yielded fairly consistent results. Results were consistent with expected magnitudes; average particle diameter (volume-to-diameter mean) was 0.8 micron, and particle charge levels ranged from 0.05 to 1 volt/micron specific particle surface gradient. Remaining problem areas are listed and suggestions are given for improving the technique and extending its usefulness.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1967
- Accession Number
- AD0813407
Entities
People
- C. E. Lapple
- D. E. Blake
- G. L. Pressman
Organizations
- SRI International