An automatic light scattering CCN counter
Abstract
The counter is a static thermal diffusion chamber which has been modified to include an optical system for the determination of droplet concentration by the measurement of scattered light. The determination of concentration is made by measurement of the peak scattered light signal from the cloud of growing droplets which is a function of both the droplet concentration and chamber supersaturation. Because the formation of the peak is related to the rate of growth of the droplets and sedimentation, both of which are determined by supersaturation, the system calibration can be uniquely determined by comparison with an absolute counter such as a static diffusion chamber with a photographic recording system.
- Publication:
-
The Third International Cloud Condensation Nuclei Workshop
- Pub Date:
- November 1981
- Bibcode:
- 1981clcn.work...40L
- Keywords:
-
- Condensing;
- Ice Nuclei;
- Light Scattering;
- Nucleation;
- Particle Density (Concentration);
- Precipitation Particle Measurement;
- Calibrating;
- Cloud Physics;
- Optical Measuring Instruments;
- Particle Diffusion;
- Thermal Diffusion;
- Instrumentation and Photography