DocumentCode
810459
Title
Diagnostics of TM010-mode microwave cavity discharges in CO2-N2-He laser gas mixtures. II. Measurement of vibration temperature
Author
Ikeda, Tetsuya ; Danno, Minoru
Author_Institution
Mitsubishi Heavy Ind. Ltd., Yokohama, Japan
Volume
31
Issue
8
fYear
1995
fDate
8/1/1995 12:00:00 AM
Firstpage
1533
Lastpage
1536
Abstract
For pt. I see ibid., vol., 31, no. 8, p. 1525-32 (1995). The plasma temperatures in microwave discharged CO2-N2-He laser gas mixtures were examined using the spectroscopic and electrostatic probe methods. A vibration temperature of N2 molecules, obtained spectroscopically, was determined to be nearly 7000 K without gas circulation and to be nearly 4000 K at the mass flow rate of 4.2 kg/h. It is found that an efficiency of laser output power exceed 14% (RF to laser output power conversion ratio) below the vibration temperature of 4000 K. The values of vibration temperature obtained were higher than those reported in DC discharges
Keywords
carbon compounds; cavity resonators; discharges (electric); gas lasers; gas mixtures; helium; high-frequency discharges; laser beams; laser cavity resonators; laser modes; nitrogen; plasma; plasma diagnostics; plasma flow; plasma probes; plasma temperature; spontaneous emission; 14 percent; 4000 K; 7000 K; CO2; CO2-N2-He; DC discharge; RF power; TM010-mode microwave cavity discharges; electrostatic probe methods; gas circulation; laser gas mixtures; laser output power; mass flow rate; microwave discharge; spectroscopic methods; vibration temperature; Electrostatics; Gas lasers; Masers; Mass spectroscopy; Microwave theory and techniques; Plasma temperature; Power generation; Power lasers; Probes; Radio frequency;
fLanguage
English
Journal_Title
Quantum Electronics, IEEE Journal of
Publisher
ieee
ISSN
0018-9197
Type
jour
DOI
10.1109/3.400407
Filename
400407
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