Characterization of Electrical Breakdown for Low and High Pressure Hydrogen Gas in Coaxial Virtual Cathode Device | ||||
| Arab Journal of Nuclear Sciences and Applications | ||||
| Article 1, Volume 51, Issue 2, April 2018, Page 1-9 PDF (522.96 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ajnsa.2018.6505 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| A.M. Shagar* 1; F. A. Ebrahim1; M. A. Abd Al-Halim2; M. E. Abdel-kader1 | ||||
| 1Plasma and Nuclear Fusion Department, Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt | ||||
| 2Physics Department, Faculty of Science, Banha University, Egypt | ||||
| Abstract | ||||
| THE DC gas discharge is established between a coaxial cylindrical stainless steel electrodes. The coaxial cylindrical DC discharge device consists of an outer grid cathode and inner rods anode with 4 mm gap between them. This experimental study is focused on the effect of gas pressure and electric field strength on breakdown voltage. There is a balance between the electron attachment and first ionization collision, so the Second Townsend emission is the responsible for maintain the discharge.The I-V characteristic curvesfor different pressures ofhydrogen gas indicate that the highest current appears for the highest gas pressure. The gas breakdown voltage varies as a product of Pd and Townsend’s coefficients depends on gas pressure and E/P, where E is the electric field and P is the gas pressure. | ||||
| Keywords | ||||
| Paschen Curve; Townsend’s Ionization Coefficients; Breakdown Voltage-A CylindricalCoaxial DC Discharge Device | ||||
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