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《Chinese Journal of Luminescence》 2015-01
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Spectroscopic Method for Measurement of Electron Number Density on DC Arc Plasma Jet Under Low Pressure Conditions

SUN Cheng-qi;GAO Yang;YANG De-ming;FU Ying-qing;College of Transportation Equipments and Ocean Engineering,Dalian Maritime University;Navigation College,Guangdong Ocean University;  
The characteristics of the low pressure direct current arc thermal spray plasma jet were analyzed by using optical emission spectra. The effects of different power levels,flow rates of H2 and detection distance on the electron number density of the thermal spray plasma jet were investigated.The electron number density of the plasma jet was determined using Δλ1 /2of Hβ(486. 13 nm) line.At the same time,the degree of ionization was analyzed using Saha equation,and the effects of H2 flow rate and arc electric current on the degree of ionization were discussed. The results show that the electron number density and ionization degree of the plasma increase with the increasing of the input power,and the increasing of H2 flow rate can enhance the energy of the plasma jet,but has a little effect on the degree of ionization.
【Fund】: 国家自然科学基金(51172033);; 大连海事大学船机修造工程交通行业重点实验室开放课题(CJXZ201303);; 中央高校基本科研业务费专项资金(3132014078 3132014323)资助项目
【CateGory Index】: TG174.4;TH744.1
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