Write a detail nnote on the physics ogf glow discharge
Answers
Glow discharge mass spectrometry (GDMS) provides a way for the direct insertion in the mass spectrometer of vapors generated from the glow chambers and permits the direct determination of impurities and depth profiling of solids [51–53]. From: Comprehensive Analytical Chemistry, 2011.
A glow discharge is a plasma formed by the passage of electric current through a gas. When the voltage exceeds a value called the striking voltage, the gas ionization becomes self-sustaining, and the tube glows with a colored light. The color depends on the gas used.
Glow Discharge (normal glow mode) The glow discharge regime owes its name to the fact that the plasma is luminous. The gas glows because the electron energy and number density are high enough to generate visible light by excitation collisions.