Instability Parameters of Optical Oscillation Frequency in Plasma Central Discharge and Periphery Region

Chin. Phys. Lett.

2006, Vol. 23

Issue (8): 2251-2254 DOI:

Original Articles

Instability Parameters of Optical Oscillation Frequency in Plasma Central Discharge and Periphery Region

ZHOU Zhu-Wen¹;M. A. LIEBERMAN²;Sungjin KIM²

¹Department of Physics, Guizhou Educational College, Guiyang 550003 ²Department of Electrical Engineering and Computer Sciences-1770, University of California, Berkeley CA 94720, USA

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ZHOU Zhu-Wen, M. A. LIEBERMAN, Sungjin KIM 2006 Chin. Phys. Lett. 23 2251-2254

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Abstract We have observed relaxation oscillations in a capacitive discharge in Ar gas, connected to a peripheral ground chamber. The plasma oscillations observed from time-varying optical emission from the main discharge chamber show, for example, a high frequency (75.37kHz) relaxation oscillation, at 100mTorr and 8W absorbed power, and a low frequency (2.72Hz) relaxation oscillation, 100mTorr and 325W absorbed power. Time-varying optical emission intensity and plasma density are also detected with a Langmuir probe. The theoretical result agrees well with experiments.

Keywords: 78.55.Mb

Published: 01 August 2006

PACS:

78.55.Mb

(Porous materials)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2006/V23/I8/02251

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