Abstract

With a diode corona charger, which is a component of ELPI(Electrical Low Pressure Impactor), aerosol particles are charged to make electrical detection possible before they are collected by the Impactor We designed and evaluated two cylindrical corona chargers, each of which had a central corona needle electrode For the performance evaluation of each corona charger the polydisperse dioctyl sebacate(DOS) particles, With 야ameters of 01-08㎛, and NaCl particles, smaller than 01 ㎛, were used The particles were then led through an electrostatic classifier (TSI model 3081) to classify monodisperse aerosol With minimal Size deviation After evaluating the wall loss of the particles in the corona charger, we measured the product of penetration and number of charges, F. n, to evaluate the corona charger efficiency at high positive voltages of 4, 5, 6 kV<br/>

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