期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 83, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4748271
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology, Japan [A 22684031]
- TEPCO Research Foundation
- JGC-S Scholarship Foundation
- Grants-in-Aid for Scientific Research [22684031] Funding Source: KAKEN
A radiofrequency (rf) antenna for helicon plasma thruster experiments is developed and tested using a permanent magnets helicon plasma source immersed in a vacuum chamber. A magnetic nozzle is provided by permanent magnets arrays and an argon plasma is produced by a 13.56 MHz radiofrequency helicon-wave or inductively-coupled discharge. A parasitic discharge outside the source tube is successfully suppressed by covering the rf antenna with a ceramic ring and a grounded shield; a decrease in the ion saturation current of a Langmuir probe located outside the source tube is observed and the ion saturation current on axis increases simultaneously, compared with the case of a standard uncovered rf antenna. It is also demonstrated that the covered antenna can yield stable operation of the source. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4748271]
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