Investigation of atmospheric pressure gas discharge plasmas

Thesis Type: Postgraduate

Institution Of The Thesis: Gazi Üniversitesi, Fen Bilimleri Enstitüsü, Turkey

Approval Date: 2012




This study has investigated the current characteristic and radiation characteristic of GaP semiconductor cathode in air ambient in a plane gas discharge cell. The experiments conducted for different electrode diameters (D=12mm and 15mm) distance values between electrodes (d=45 μm, 90 μm, 143 μm, 240 μm, 323 μm, 445 μm and 525 μm) have been repeated. The effect of electrode diameter and distance between electrodes has been examined in a wide range of pressure. Measurements starting from p=28 Torr to the atmospheric pressure level (p=690 Torr) have been made. Thus, the impact of pressure on current and radiation characteristics has been investigated. Current and radiation characteristics become unstable in direct proportion to the increase in the distance between the electrodes and electrode diameter. This study is significant from the point that the GaP shows a behavior of both direct bandwidth and indirect bandwidth. In addition to this, GaP is an alternative semiconductor material to the other expensive and more toxic semiconductors.