Plasma Generation in a Pulsed Mode of a Non-Self-Sustained Arc Discharge with a Hybrid Hot-and-hollow Cathode
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The results of investigation of pulsed burning modes of a non-self-sustained arc discharge with a combined hot-and-hollow cathode are presented. The principal discharge characteristics are measured at the currents up to 350 A and discharge burning voltages up to 200 V within the working pressure range 0.2–1 Pa. It is shown that an increase in the working pressure gives rise to an increase in the discharge current as a result of gas amplification, resulting from an improvement in the processes of fast electron energy utilization during gas ionization. The maximum resulting discharge current in a nitrogen atmosphere at a pressure of 0.8 Pa is found to be 550 A at the discharge burning voltage up to 200 V and the maximum pulsed power up to 80 kV. The concentration of plasma in the center of the ≈0.2 m3 chamber is found to be about 4·1017 m–3 at the density of the ion current from plasma approximately 6.5 mA/cm2 and the discharge pulsed power 18 kW.
Keywordsnon-self-sustained arc discharge low pressure hot cathode pulsed burning mode current-voltage characteristics
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- 1.H. Conrads and M. Schmidt, Plasma Sources Sci. Technol., No. 9, 441–454 (2000).Google Scholar
- 3.E. V. Berlin, N. N. Koval, and L. A. Seidman, Plasma Chemical and Heat Treatment of the Surfaces of Steel Parts [in Russian], Tekhnosfera, Moscow (2012).Google Scholar
- 4.P. M. Shchanin, N. N. Koval, I. M. Goncharenko, and S. V. Grigoriev, Zh. Fiz. Khim. Obr. Mater., No. 3, 16–19 (2001).Google Scholar
- 9.S. S. Kovalskii, V. V. Denisov,N. N. Koval, and I. V. Lopatin, Izv. Vyssh. Uchebn. Zaved. Fiz., 57, No. 11/3, 78–81 (2014).Google Scholar
- 11.K. N. Ulyanov, J. High Temp., 37, No. 3, 363–373 (1999).Google Scholar