Abstract
An in situ method to image individual aerosol particles upon desorption/ionization in a single particle aerosol mass spectrometer using shadowgraph imaging is presented and applied directly to determine a 2D spatial distribution of 5.0 μ m particles. This new technique is complementary to previously reported methods for the determination of focused particle beam profiles and has several advantages, including a very low particle concentration requirement and the ability to collect the image of an individual particle with a correlated mass spectrum. Images are presented for 1.3, 2.1, 3.0, and 5.0 μ m polystyrene latex spheres. Particle beam profiles are presented in the directions perpendicular and parallel to the particle beam axis. These results are qualitatively compared to those of a complementary particle collection method (dusting) used at Lawrence Livermore National Laboratory to characterize aerosol beam focusing.
Original language | English (US) |
---|---|
Pages (from-to) | 10-18 |
Number of pages | 9 |
Journal | Journal of Aerosol Science |
Volume | 39 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2008 |
Keywords
- Aerosol
- Mass spectrometry
- Shadowgraph
- Single particle imaging
ASJC Scopus subject areas
- Atmospheric Science
- Environmental Science(all)