Experimental study on controlled production of two-electron temperature plasma

TL;DR

This paper presents a simple method to produce and control two-electron temperature plasma by diffusing two plasmas with different parameters, and uses ion-acoustic waves as a diagnostic tool.

Contribution

It introduces an effective, controllable technique for generating two-electron temperature plasma and demonstrates its potential for plasma diagnostics and industrial applications.

Findings

Effective control of electron temperatures and densities achieved

Ion-acoustic waves used to confirm two-electron components

Method applicable for plasma processing industries

Abstract

A two-electron temperature plasma is produced by the method of diffusion of two different plasmas with distinct temperatures and densities. The method is simple and provides an adequate control over the plasma parameters. The study reveals that the temperature and density of both the electron groups can be effectively controlled by just changing the discharge currents of both the plasmas. An ion-acoustic (IA) wave is excited in the plasma and is detected using a planar Langmuir probe. The damped amplitude of the wave is measured and is used as a diagnostic tool for establishing the presence of two-electron components. This production method can be helpful in controlling the hot electron density and temperature in plasma processing industries.