Simulation of motion of charged particle within a fluid in an optical tube

Abstract

In this study, the behavior of charged particles within a fluid is investigated when exposed to the radiation of a Laguerre-Gaussian beam as an optical tube. Optical forces (e.g., Photophoretic, Radiation pressure and Lorentz forces) and non-optical forces (e.g., Drag and gravitational forces) determine the trajectories of ions movement within these beams. Trapping of charged particles in the direction of the beam axis in an optical tubes depends on the superiority of the radial component of the photophoretic force on the electromagnetic force. The factors affecting this, such as the amount and type of electrostatic charge and the radius of the particle, and the shape and power of the beam are studied. As a result, the charged particle can be guided to various paths based on their electrostatic charge and particle diameter. This could be done in the study of ions within a fluid by optical methods. One of the applications proposed in this regard is that we can counted charged and uncharged particles within a fluid (e.g., liquid ions or aerosols) by separating them in an optical tube. © 2019