Optimization of millimeter wave system in ITER Equatorial EC H&CD Launcher |
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| Affiliation: | 1. Nano-Optoelectronics Research Laboratory, School of Physics, Universiti Sains Malaysia, 11800 Penang, Malaysia;2. Faculty of Electrical Engineering, Universiti Teknologi MARA, 13500 Permatang Pauh, Pulau Pinang, Malaysia;3. Material Innovations and Nanoelectronics Research Group, Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia;4. Faculty of Science and Engineering, University of Soran, Erbil, Iraq;5. Faculty of Electrical Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia;1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China;2. Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230029, China;1. Program of Postgraduate in Biochemical Toxicology, Universidade Federal de Santa Maria, Brazil;2. Department of Small Animals, Universidade Federal de Santa Maria, Brazil;3. Department of Pathology, Universidade Federal de Santa Maria, Brazil;4. Department of Preventive Medicine Veterinary, Universidade Federal de Santa Maria, Brazil;5. Department of Clinical and Toxicological Analysis, Universidade Federal de Santa Maria, Brazil;6. Department of Animal Science, Universidade do Estado de Santa Catarina, Brazil;1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China;2. University of Science and Technology of China, Hefei 230022, China;1. EcoTopia Science Institute, Nagoya University, Nagoya 464-8603, Japan;2. Genesia Co., Mitaka, Tokyo 181-0013, Japan;3. Japan Atomic Energy Agency, Naka, Ibaraki 801-1, Japan;4. Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan;5. Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan |
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| Abstract: | A high power (20 MW) and CW millimeter wave (mm-wave) injection is planned for Electron Cyclotron Heating and Current Drive (EC H&CD) in ITER. An optimization of the mm-wave system for the ITER EC H&CD Equatorial Launcher (EL) is performed. The optimization of the system is aimed to obtain the maximum transmission efficiency on the condition that 1.8 MW injection per waveguide, ∼20 cm in beam radius at the resonance layer and narrow opening of the Blanket Shielding Module (BSM). The transmission efficiency of 99.1% from the end of the waveguide inside the launcher to the output of the BSM is achieved.The mm-wave propagation with high order modes is also calculated by using an experimentally obtained high power mm-wave beam pattern that includes 95%HE11, 0.6%LP11, 0.2%LP02 and 4.2% other higher order modes. The analysis predicts the 1–2% additional loss will be induced by the high order modes. |
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| Keywords: | EC H&CD Launcher High power millimeter wave ITER |
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