Accession Number : AD0271755

Title :   Final Technical Report, 1 September-31 October 1961.

Corporate Author : INSTITUTE FOR ADVANCED STUDIES DUBLIN (IRELAND)

Report Date : 31 OCT 1961

Pagination or Media Count : 1

Abstract : The relative photo-electric nucleus counter was calibrated under laboratory conditions by means of the absolute stereo-photographic nucleus counter and work was done for a calibration when counting nuclei under extreme conditions of temperature and pressure, such as are encountered at high altitudes. The effect of various processes taking place in the fog of a photo-electric counter during its operation was studied. The properties of atmospheric freezing and seasalt nuclei were investigated. The study of the effect of pressure and temperature on the counting of nuclei was completed. Tables and graphs giving mobility vs. size and the number of uncharged particles in per cent of the total number of particles vs. size and vice versa were computed. An investigation into the validity of Boltzmann's law for small condensation nuclei was undertaken. The approach to charge equilibrium in a stored aerosol by natural aging and alpha-ray irradiation was studied. (Author)

Descriptors :   *AEROSOLS, *NUCLEI, CONDENSATION, COUNTING METHODS, PARTICLES, PRESSURE, TEMPERATURE

Distribution Statement : APPROVED FOR PUBLIC RELEASE