The Electrostatic spray device was originally developed at Princeton Plasma Physics Laboratory, it has been rebuilt at Prairie View A & M University and started operation from 2002. The device consists of a capillary needle with a high voltage applied to it, that sprays a cone of charged oil droplets of around one micron radius into a vacuum tank. The distribution of charges with respect to droplet radius is measured by means of a quadrupole mass filter and a charge detector. We worked on experiments with Octoil, which revealed the multi-peak character of the charge distribution, and now working on further improvement by using other types of liquids. A group of students participate in this project , sponsored by ORISE/NRC HBCU Student Participation Program.
