  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.
