Oxide Coated Cathode Plasma Source of Linear Magnetized Plasma Device

Plasma source is the most important part of the laboratory plasma platform for fundamental plasma experimental research. Barium oxide coated cathode plasma source is well recognized as an effective technique due to its high electron emission current. An indirectly heated oxide coated cathode plasma...

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Published inPlasma science & technology Vol. 18; no. 9; pp. 918 - 923
Main Author 胡广海 金晓丽 袁林 张乔枫 谢锦林 李弘 刘万东
Format Journal Article
LanguageEnglish
Published 01.09.2016
Subjects
发射电流密度
氧化物涂层
电子温度
磁化
等离子体源
等离子体装置
线性
阴极
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ISSN1009-0630
DOI10.1088/1009-0630/18/9/08

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Summary:Plasma source is the most important part of the laboratory plasma platform for fundamental plasma experimental research. Barium oxide coated cathode plasma source is well recognized as an effective technique due to its high electron emission current. An indirectly heated oxide coated cathode plasma source has been constructed on a linear magnetized plasma device. The electron emission current density can reach 2 A/cm2 to 6 A/cm2 in pulsed mode within pulse length 5-20 ms. A 10 cm diameter, 2 m long plasma column with density 10is m-3 to 1019 m3 and electron temperature Te --~ 3-7 eV is produced. The spatial uniformity of the emission ability is less than 4% and the discharge reproducibility is better than 97%. With a wide range of the plasma parameters, this kind of plasma source provides great flexibility for many basic plasma investigations. The detail of construction and initial characterization of oxide coated cathode are described in this paper.
Bibliography:oxide coated cathode, plasma source, magnetized plasma, pulse discharge
HU Guanghai , JIN Xiaoli , YUAN Lin, ZHANG Qiaofeng , XIE Jinlin , LI Hong ,LIU Wandong （ Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China）
Plasma source is the most important part of the laboratory plasma platform for fundamental plasma experimental research. Barium oxide coated cathode plasma source is well recognized as an effective technique due to its high electron emission current. An indirectly heated oxide coated cathode plasma source has been constructed on a linear magnetized plasma device. The electron emission current density can reach 2 A/cm2 to 6 A/cm2 in pulsed mode within pulse length 5-20 ms. A 10 cm diameter, 2 m long plasma column with density 10is m-3 to 1019 m3 and electron temperature Te --~ 3-7 eV is produced. The spatial uniformity of the emission ability is less than 4% and the discharge reproducibility is better than 97%. With a wide range of the plasma parameters, this kind of plasma source provides great flexibility for many basic plasma investigations. The detail of construction and initial characterization of oxide coated cathode are described in this paper.
34-1187/TL
ISSN:1009-0630
DOI:10.1088/1009-0630/18/9/08