11. A heating mechanism or a glow discharge plasma may be used to clean the probe and prevent misleading results. 12. Even when contacts are separated, there may be a conductive path due to arcing or a glow discharge . 13. In an analytical glow discharge , the discharge is primarily a negative glow with dark region above and below it. 14. When an arc starts, its terminal voltage is much less than a glow discharge , and current is higher. 15. The gas in the bulb ionizes, starting a glow discharge , and its resistance drops to a low value. 16. This generates a glow discharge containing ionized gas, electrons and excited state atoms / molecules ( metastable species ). 17. When a high voltage was applied between the electrodes, the inside of the tube lit up with a glow discharge . 18. If the applied voltage is higher than the plateau, a continuous glow discharge is formed and the tube cannot detect radiation. 19. Excited states are typically formed in the DART source by creating a glow discharge in a chamber through which the gas flows. 20. An arc between two electrodes can be initiated by ionization and glow discharge , as the current through the electrodes is increased.
