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HU Guanghai (胡广海), JIN Xiaoli (金晓丽), YUAN Lin (袁林), ZHANG Qiaofeng (张乔枫), XIE Jinlin (谢锦林), LI Hong (李弘), LIU Wandong (刘万东). Oxide Coated Cathode Plasma Source of Linear Magnetized Plasma Device[J]. Plasma Science and Technology, 2016, 18(9): 918-923. DOI: 10.1088/1009-0630/18/9/08
Citation: HU Guanghai (胡广海), JIN Xiaoli (金晓丽), YUAN Lin (袁林), ZHANG Qiaofeng (张乔枫), XIE Jinlin (谢锦林), LI Hong (李弘), LIU Wandong (刘万东). Oxide Coated Cathode Plasma Source of Linear Magnetized Plasma Device[J]. Plasma Science and Technology, 2016, 18(9): 918-923. DOI: 10.1088/1009-0630/18/9/08

Oxide Coated Cathode Plasma Source of Linear Magnetized Plasma Device

Funds: supported by National Natural Science Foundation of China (No. 11275200)
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  • Received Date: October 13, 2015
  • 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/cm 2 to 6 A/cm 2 in pulsed mode within pulse length 5–20 ms. A 10 cm diameter, 2 m long plasma column with density 10 18 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.
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