Fig. 2
From: Methodology for quantifying particle charge statistics in electric fields of gas insulations
The charge of ZnO particles with mean diameters between 12.5 \(\upmu\)m and 145 \(\upmu\)m at two field strengths is shown for the upward and downward motion. n gives the number of data points per diameter. (a) At a field strength of 5 KV cm\(^{-1}\), the upward-moving particles possess a broad spectrum of negative charges. (b) At 10 KV cm\(^{-1}\), the particles show slightly lower charge magnitudes while the spread slightly increases. (c) The downward-moving particles at 5 KV cm\(^{-1}\) possess charges with negative and positive polarities with different magnitudes. (d) The same can be observed for the downward-moving particles at 10 KV cm\(^{-1}\).
