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Liang C, Liu Z, Yuan JS, Li Y, Gu Y, Huang D, Lu S, Zuo GZ, Hu JS, Feng Y. Safety factor diagnostic for tokamak core plasma from three-dimensional reconstruction of pellet ablation trail. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2024; 95:043502. [PMID: 38563715 DOI: 10.1063/5.0198109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 03/14/2024] [Indexed: 04/04/2024]
Abstract
Using a stereo camera system, a new diagnostic for the safety factor of the core plasma based on the pellet ablation trail is applied on the Experimental Advanced Superconducting Tokamak (EAST). In EAST discharge No. 128 874, a shattered pellet injection system is applied to inject a shattered neon pellet into the EAST. Since the strong magnetic field in tokamaks binds the ablated pellet material, the orientation of the pellet ablation trail is the same as the local magnetic field direction. Thus, from the three-dimensional reconstruction result of the pellet ablation trail, the local safety factor q can be obtained. The motional Stark effect (MSE) diagnostic is applied to determine the safety factor q profile in this shot. The determined safety factor q results for this new diagnostic are in quantitative agreement with those from the MSE diagnostic with the mean relative difference of only 6.8%, confirming the effectiveness of this new diagnostic of the safety factor.
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Affiliation(s)
- Chen Liang
- Institute of Plasma Physics and Technology, Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou 215006, China
| | - Zhuang Liu
- Institute of Plasma Physics and Technology, Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou 215006, China
| | - J S Yuan
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Yichao Li
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Yongqi Gu
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Dong Huang
- Institute of Plasma Physics and Technology, Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou 215006, China
| | - Shaoyu Lu
- Institute of Plasma Physics and Technology, Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou 215006, China
| | - G Z Zuo
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - J S Hu
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Yan Feng
- Institute of Plasma Physics and Technology, Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou 215006, China
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Tsui HYW, Wootton AJ, Bell JD, Bengston RD, Diebold D, Harris JH, Hershkowitz N, Hidalgo C, Ingraham JC, Kilpatrick SJ, Li GX, Lin H, Manos DM, Meier MA, Miller GM, Munson CP, Pew J, Prager SC, Ritz CP, Rudyj A, Schoenberg KF, Sorensen J, Tanaka T, Uckan T, Weber PG. A comparison of edge turbulence in tokamaks, stellarators, and reversed-field pinches*. ACTA ACUST UNITED AC 1993. [DOI: 10.1063/1.860734] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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