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Physics of Plasmas : Spectroscopic study on rotational and vibrational temperature of N2 and N2+ in dual-frequency capacitively coupled plasma

By Xiao-Jiang Huang, Yu Xin, Lei Yang, Quan-Hua Yuan, and Zhao-Yuan Ning

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Book Id: WPLBN0002169662
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 20 November 2008

Title: Physics of Plasmas : Spectroscopic study on rotational and vibrational temperature of N2 and N2+ in dual-frequency capacitively coupled plasma  
Author: Xiao-Jiang Huang, Yu Xin, Lei Yang, Quan-Hua Yuan, and Zhao-Yuan Ning
Volume: Issue : November 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Physics of Plasmas Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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Yu Xin, Lei Yang, Quan-Hua Yuan, And Zhao-Yuan Nin, X. H. (n.d.). Physics of Plasmas : Spectroscopic study on rotational and vibrational temperature of N2 and N2+ in dual-frequency capacitively coupled plasma. Retrieved from http://community.worldlibrary.org/


Description
Description: By using optical emission spectroscopy, the vibrational and rotational temperatures of N2 and N2+ in capacitively coupled plasma (CCP) discharges driven by dual-frequency 41 MHz and 2 MHz are investigated. The vibrational and rotational temperatures are measured based on the N2+ first negative system and N2 second positive system overlapped molecular emission optical spectrum, using the method of comparing the measured and calculated spectra with a least-square procedure. The influence of the rotational and vibrational temperatures with input power of the high frequency (HF) and low frequency (LF) as well as the gas pressure is discussed. It is found that the vibrational or rotational temperatures of N2 and N2+ are decoupled in dual-frequency CCP discharge. The influence of the LF power on N2+ rotational and vibrational temperature is much more than that of N2, while the influence of HF power is just opposite to the case of LF power. The reason for this is thought to be the variation of electron temperature when applying HF or LF power. Additionally, the increase of gas pressure makes the difference between the vibrational and rotational temperature decrease.

 

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