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Xia Y, Yang X, Chang L, Zhou H, Zhang JH, Jing D, Xu Q, Niu GJ, Zhou HS, Luo GN. Development of a compact helicon plasma source with two sets of ring array permanent magnets for the study of blue core plasma. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2023; 94:125110. [PMID: 38126814 DOI: 10.1063/5.0170135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 11/29/2023] [Indexed: 12/23/2023]
Abstract
A compact helicon plasma source for the study of helicon plasma, especially for the study of blue core plasma, is designed and developed with permanent magnets (PMs). The structure of the PMs consists of two sets of ring array magnets with opposite magnetization. This structure can provide a higher magnetic field with fewer PMs, which is helpful for controlling the device's mass. A quartz tube with 50 cm in length, 5 cm in outer diameter, and 0.3 cm in thickness is used. Argon helicon plasma is produced at ∼38 sccm (3.4 Pa inlet chamber and 0.122 Pa diffusion chamber) by a radio frequency (RF) power of ∼13.56 MHz using a helical antenna under a high magnetic field (∼1600 G). Preliminary results measured by the Langmuir probe, photomultiplier tube (PMT), CCD, and Hall coil are applied to characterize the helicon plasma in this source, such as the mode transition and the formation of the blue core with the RF power variation. The device generates the blue core (W mode) plasma at a lower power of about 200 W, and the energy coupling efficiency is as high as 65%.
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Affiliation(s)
- Ying Xia
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- University of Science and Technology of China, Hefei 230026, China
| | - Xin Yang
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Lei Chang
- State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing 400044, China
| | - Hua Zhou
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Jin-Heng Zhang
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- University of Science and Technology of China, Hefei 230026, China
| | - Dong Jing
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- University of Science and Technology of China, Hefei 230026, China
| | - Qian Xu
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Guo-Jian Niu
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Hai-Shan Zhou
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- University of Science and Technology of China, Hefei 230026, China
| | - Guang-Nan Luo
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- University of Science and Technology of China, Hefei 230026, China
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Tipton JB, Lumsdaine A, Kaufman MC, Caneses Marin J, Cook J, Ferguson P, Goulding R, McGinnis D, Rapp J, MPEX Team. Analysis of Design Alternatives of Actively Cooled RF Window for MPEX. FUSION SCIENCE AND TECHNOLOGY 2021. [DOI: 10.1080/15361055.2021.1898302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | | | | | | | - Jason Cook
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | | | | | | | - Juergen Rapp
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | - MPEX Team
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
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