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Wu J, Chen Y, Liu J, Guo P, Xue L, Yao L. Electromagnetic Load Analysis During Plasma Disruption for HL-2M Tokamak Plasma-Facing Components. FUSION SCIENCE AND TECHNOLOGY 2023. [DOI: 10.1080/15361055.2022.2162793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
Affiliation(s)
- Jing Wu
- University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Yajing Chen
- University of Electronic Science and Technology of China, Chengdu 610054, China
- Southwestern Institute of Physics, Chengdu 610041, China
| | - Jian Liu
- Southwestern Institute of Physics, Chengdu 610041, China
| | - Pengcheng Guo
- University of Electronic Science and Technology of China, Chengdu 610054, China
- Southwestern Institute of Physics, Chengdu 610041, China
| | - Lei Xue
- Southwestern Institute of Physics, Chengdu 610041, China
| | - Lieming Yao
- University of Electronic Science and Technology of China, Chengdu 610054, China
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Wang HX, Zhou Y, Li Y, Li YG, Yi J, Deng ZC, Gao Z, Wu TY, Yin ZJ, Akiyama T. A new dispersion interferometer on HL-2A. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2017; 88:103502. [PMID: 29092472 DOI: 10.1063/1.4997974] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In order to avoid a fringe jump caused by high plasma density and pellet injection [Y. Zhou et al., Rev. Sci. Instrum. 87, 11E107 (2016)], a new CO2 dispersion interferometer is designed and commissioned on HL-2A for average line-density measurement and density feedback control. The second harmonic technology in this system eliminates the phase shift caused by mechanical vibration. Signals are processed by a digital phase comparator and can be monitored in real time. A series of experiments are conducted to study the characteristics of the system such as a second harmonic coefficient and long-term stability. The resolution of density measurement is less than 8 × 1017/m3, and the experiment result on HL-2A demonstrates the interferometer's capability to track plasma density evolution with rapid change. The system also shows good stability against mechanical vibrations.
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Affiliation(s)
- H X Wang
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - Y Zhou
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - Y Li
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - Y G Li
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - J Yi
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - Z C Deng
- Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - Z Gao
- Department of Engineering Physics, Tsinghua University, Beijing 10084, China
| | - T Y Wu
- State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China
| | - Z J Yin
- State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China
| | - T Akiyama
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu 509-5292, Japan
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Wu T, Zhang W, Yin Z. A wide range real-time synchronous demodulation system for the dispersion interferometer on HL-2M. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2017; 88:093501. [PMID: 28964172 DOI: 10.1063/1.4991318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 08/17/2017] [Indexed: 06/07/2023]
Abstract
A real-time synchronous demodulation system has been developed for the dispersion interferometer on a HL-2M tokamak. The system is based on the phase extraction method which uses a ratio of modulation amplitudes. A high-performance field programmable gate array with pipeline process capabilities is used to realize the real time synchronous demodulation algorithm. A fringe jump correction algorithm is applied to follow the fast density changes of the plasma. By using the Peripheral Component Interconnect Express protocol, the electronics can perform real-time density feedback with a temporal resolution of 100 ns. Some experimental results presented show that the electronics can obtain a wide measurement range of 2.28 × 1022 m-2 with high precision.
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Affiliation(s)
- Tongyu Wu
- State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Wei Zhang
- State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, People's Republic of China
| | - Zejie Yin
- State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, People's Republic of China
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