Related Experiment Video
Updated: Jul 3, 2026

Building Langmuir Probes and Emissive Probes for Plasma Potential Measurements in Low Pressure, Low Temperature Plasmas
Published on: May 25, 2021
Electric potential around an absorbing body in plasmas: effect of ion-neutral collisions
S A Khrapak1, B A Klumov, G E Morfill
1Max-Planck-Institut für extraterrestrische Physik, D-85741 Garching, Germany.
Abstract:
A simple linear kinetic model is used to investigate the combined effect of plasma absorption and ion-neutral collisions on the electric potential around a small absorbing body in weakly ionized plasmas. It is demonstrated that far from the body the potential decays considerably slower than the conventional Debye-Hückel potential. Moreover, at distances exceeding approximately the ion mean free path, the potential approaches an unscreened Coulomb-like asymptote. Some important consequences of this result are discussed in the context of complex (dusty) plasmas.
Related Concept Videos
Electric Field of Parallel Conducting Plates
Consider a cross-section of a thin, infinite conducting plate having a positive charge. For such a large thin plate, as the thickness of the plate tends to zero, the positive charges lie on the plate's two large faces. Without an external electric field, the...
Electric Potential Energy
The electrostatic or Coulomb...
Potential Due to a Polarized Object
Electric Potential Energy in a Uniform Electric Field
Electric Potential Energy of Two Point Charges
Dielectric Polarization in a Capacitor

