Figures & data
FIG. 1 Three configurations of the DMA. (a) Air outlet DMA, (b) DMA with an open internal electrometric collector, and (c) DMA with a shielded internal electrometric collector.
FIG. 2 Diagram of the cluster ion mobility analyzer UT-7509, which includes the Erikson bridge.
FIG. 3 Diagram of the mobility analyzer BSMA, which includes the Komarov bridge.
FIG. 4 Simplified section of the SIGMA aspiration condenser. The plates are marked in the drawing with their ends indicating the polarity: rhombs mark positive, round spots negative, and plain ends zero potential. The real geometric edges of all plates are still plain.
FIG. 5 Simplified electric diagrams of the SIGMA. (a) High voltage relaxation RC-circuit and (b) electrometric collector and amplifier.
FIG. 6 Standard deviation or random errors in the fraction concentrations of the mobility distribution. The upper curve corresponds to 253 high-noise measurements, whose integral noise exceeds the median, and the lower curve to 253 low-noise measurements where the integral noise remains below the median. The middle curve characterizes all 506 5-min records.
TABLE 1 Estimates of standard deviations of the decade-to-eight mobility fraction concentrations for 5-min cycles, cm−3
FIG. 7 Air ion mobility distribution recorded at the test site between UT 20:00 and 23:00 on September 30, 2009. The wide range of the fraction concentrations is made visible using a simultaneous presentation of the distributions on the left and right axes.
FIG. 8 Results of high time resolution measurements of balloelectric ions generated by water jet experiment. The numbers in the legend show diameter limits of the ion groups expressed in nanometers. The water jet was opened at 0 and closed at 10 minutes from beginning the experiment.
