Evaluation of Mass and Charge state of the Droplets Produced by Vacuum Electrospray of Aqueous Solutions

Abstract

In the previous study, we have developed a technique to produce electrospray of aqueous solutions in vacuum. This technique could be expected to be a high-intensity massive cluster ion beam, and we are evaluating the performance of the vacuum-type electrospray droplet ion gun. In this study, the mass to charge ratio and the charge states of the droplets were experimentally evaluated by measuring the flight time of the droplets and observing the impact marks on the smooth surface after droplet beam irradiation.