Studies on the Atmospheric Ion Spectrum (I)

A newly designed apparatus for measuring the mobility spectrum of atmospheric ions was constructed in 1959, on the basis of the method previously developed by the author. After the examination of the air flow pattern through the aspiration cylinder, measurements of the mobility spectrum have been resumed since 1960. Two ion probes were used in the present studies with different diameters and with the same length to scan the mobility ranges of 30.1 and 0.1-0.005 cm2/volt sec, respectively. Dedails on the experimental set-up, procedures of experiments and practical treatments of data analysis are described in this paper.