[논문]Design of ECH launcher for KSTAR advanced Tokamak operation

Joung, Mi; Woo, Minho; Han, Jongwon; Wang, Sonjong; Kim, Sunggug; Hahn, Sanghee; Lee, Dongjea; Kwak, Jonggu; Ellis, Robert

doi:10.1016/j.fusengdes.2019.111395

[해외논문] Design of ECH launcher for KSTAR advanced Tokamak operation 원문보기

Fusion engineering and design, v.151, 2020년, pp.111395 -

Joung, Mi (National Fusion Research Institute) , Woo, Minho (National Fusion Research Institute) , Han, Jongwon (National Fusion Research Institute) , Wang, Sonjong (National Fusion Research Institute) , Kim, Sunggug (National Fusion Research Institute) , Hahn, Sanghee (National Fusion Research Institute) , Lee, Dongjea (Ulsan National Institute of Science and Technology) , Kwak, Jonggu (National Fusion Research Institute) , Ellis, Robert (Princeton Plasma Physics Laboratory)

Abstract ▼ AI-Helper

Abstract For the advanced tokamak operation in Korea Superconducting Tokamak Advanced Research (KSTAR), up to 6 MW of electron cyclotron heating (ECH) is planned. The ECH launcher should be able to operate in steady state and serve as a central/off-axis heating and current drive, q-profile control, and control of the neoclassical tearing mode (NTM) and sawtooth. The water cooled launchers have been upgraded to include continuous operation with precise, high-speed real-time control of the beams by integration with the plasma control system (PCS) for supporting the experiments, in particular for suppressing NTM. In this study, the launcher was successfully operated for 78 s with about 650 kW EC power, where the temperature of the coolant, with a flow rate of 9.6 lpm, is saturated and approximately 2 °C. The launcher control system had a maximum control cycle of 5 kHz and a motor latency of about 10 ms, and the poloidal scanning speed of the beam was 20°/s. Additionally, for the higher localization of power deposition, the curvature and size of the mirrors in the launcher were optimized. This paper presents the ECH launcher design and its control system with the operation results. Highlights KSTAR ECH launcher was designed for long pulse, high performance plasma operation. The designed water cooled ECH launcher was stably operated for 78 s with about 650 kW EC power. For high performance plasma operation, the fast launcher control systemdeveloped based on FPGA had a maximum control cycle of 5 kHz. Launcher control system had a motor latency of about 10 ms and the final poloidal scanning speed of the beam was 20°/s.

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참고문헌 (21)

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