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주요연구

주요연구


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핵물리 및 플라즈마 분야 | MIR (Microwave Imaging Reflectometry) 진단 시스템 / MIR diagnostics system

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2017.02.07 / 2,890

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MIR(Microwave Imaging Reflectometry) 장치는 플라즈마의 컷오프 층(cut-off layer)에 마이크로파를 입사시킨 뒤, 반사되어 나오는 빔의 위상차를 이용하여 컷오프층의 전자밀도요동을 측정하는 진단 장치로써,  KSTAR MIR 장치는 2012년 KSTAR G-port에 설치되었다. 세로 방향으로 배열된 16개의 detector와 사중 주파수 마이크로파 소스를 이용함으로서 (16 X 4)의 공간 데이터를 동시에 측정하며, 이를 통해 플라즈마 내부 밀도 요동을 준 2차원으로 시각화 할 수 있다. MIR 장치는 플라즈마의 MHD 불안정구조 및 섭동 현상 분석에 기여하고 있다.

MIR(Microwave Imaging Reflectometry) is the diagnostics system that measures the electron denstiy fluctuation at the cut-off layer by resolving phase difference between reflected microwave and its reference. The detector array of 16 vertical channels with 4 probing frequencies enables the construction  of quasi 2-D density fluctuation. The temoral evolution of MHD intabilities and plasma turbulence can be ontained. 


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