Description and discussion of the NRL TGDCC
Abstract
The NRL thermal gradient diffusion cloud chamber (TGDCC) consists of two plates 7.5 cm in diameter separated by 1.25 cm and covered with saturated filter paper. The cylindrical wall separating the plates is glass. The top plate is at room temperature and the bottom plate is cooled with a thermoelectric cooler. The temperature difference is measured with several sets of thermocouples. The CCN concentration was determined from the video recording. This procedure of averaging the maximum count obtained on several successive recordings at the same supersaturation results in concentrations which are somewhat higher than concentrations calculated from an average across the plateau.
- Publication:
-
The Third International Cloud Condensation Nuclei Workshop
- Pub Date:
- November 1981
- Bibcode:
- 1981clcn.work...14H
- Keywords:
-
- Cloud Chambers;
- Condensing;
- Counters;
- Ice Nuclei;
- Nucleation;
- Particle Diffusion;
- Precipitation Particle Measurement;
- Cloud Physics;
- Drop Size;
- Particle Size Distribution;
- Supersaturation;
- Thermal Diffusion;
- Video Equipment;
- Instrumentation and Photography