Charging processes of particles produced from dilute xylene in air under electron beam irradiation

The yields of charged particles relative to those of total particles from o-xylene based on their number and volume concentrations (ηN and ηV) and the polarities of the charged particles of products were examined under EB irradiation without and with external fields applied to irradiated air mixtures, which are the conditions with bipolar ions and unipolar ions, respectively. The ηN and ηV by bipolar ions were constant at 31-37% and 56-59%, respectively, independent of dose and initial xylene concentration, while those by unipolar ions were 48-55% and 91-93%, respectively.