Physical Characteristics of the Modified Glow Discharge Ion Source |
| B.A. Soliman, M.M. Abdelrahman, N.I. Basal and F.W. Abdelsalam
Accelerators and Ion Sources Department, Nuclear Research Center, Atomic Energy Authority, 13759, Cairo, Egypt |
| Received: July 15, 2016; Revised version: July 8, 2017; In final form: September 15, 2017 |
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| This work is concerned with a study on the operating characteristics of a self-axial extraction-type glow-discharge ion source. This compact ion source, with conical anode of various divergence angle Θp, can work under different operating conditions. An output ion beam currents Ib were measured at a distance dcc=5 cm from the plane cathode, and were found to be dependent upon the gas pressure p, angle Θp and the discharge current Id. High ion beam currents of 85 μA and 410 μA were obtained at the optimum angle Θp=30° for discharges: [N2 gas, p=2.9× 10-2 mbar, Id=2 mA] and [H2 gas, p=7.7× 10-2 mbar, Id=2 mA], respectively. |
DOI: 10.12693/APhysPolA.133.10 Topics: plane cold cathode, copper anode of different angles, ion source, plasma and discharge anisotropy |