Application of millimeter-wave imaging system to LHD
作者： A. Mase , M. Ohashi , A. Yamamoto , H. Negishi , N. Oyama
DOI: 10.1063/1.1309004
关键词: Physics 、 Optics 、 Amplifier 、 Large Helical Device 、 Detector 、 Monolithic microwave integrated circuit 、 Intermediate frequency 、 Extremely high frequency 、 Heterodyne 、 Heterodyne detection
摘要: Millimeter-wave imaging systems in the frequency range of 70–140 GHz have been developed for diagnostics magnetically confined plasmas. The 70 system successfully measures time evolutions both radial and axial profiles line density electron cyclotron emission (ECE) a tandem mirror. is being installed Large Helical Device (LHD) at National Institute Fusion Science. In order to cover second harmonic ECE on LHD, new detector using monolithic microwave integrated circuit technology has designed fabricated. consists integration receiving antenna, down-converting mixer diode, an intermediate amplifier GaAs substrate chip. heterodyne response up 10 was confirmed GHz. optical consisting ellipsoidal mirror flat by ray-tracing code evaluated experimentally 140
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