| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Transition of Discharge Mode of a Local Hollow Cathode Discharge |
LI Shang, OUYANG Ji-Ting, HE Feng |
| School of Science, Beijing Institute of Technology, Beijing 100081 |
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| Cite this article: |
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LI Shang, OUYANG Ji-Ting, HE Feng 2010 Chin. Phys. Lett. 27 065201 |
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Abstract The discharge characteristics of hollow cathode discharge in argon in a cylindrical cavity are investigated experimentally. The voltage-current (V-I) characteristics and the light emission are measured. It is found that the discharge plasma is localized inside the hollow cavity, with an extensive Faraday dark space between the cathode and the anode. The discharge develops from predischarge to abnormal glow discharge, the hollow cathode effect (HCE) and a hybrid mode as the discharge current increases. The onset of the HCE is found for the first time by the transition from abnormal glow discharge together with a significant decrease in the slope of the V-I curve which shows a positive differential resistivity. The voltage increases proportionally with the current when the HCE is reached.
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| Keywords:
52.80.Hc
51.50.+v
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Received: 25 January 2010
Published: 25 May 2010
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