Development of an ICRH antenna system at W7-X for plasma heating and wall conditioning
| Autor: | D. Birus, F. Durodié, D.A. Castaño Bardawil, S. A. Bozhenkov, A. Krivska, G. Offermanns, F. Louche, Olaf Neubauer, A. M. Messiaen, R. C. Wolf, V. Borsuk, J. Ongena, D. A. Hartmann, K. P. Hollfeld, M. Vervier, J. P. Kallmeyer, B. Schweer, G. Satheeswaran, M. Van Schoor |
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| Přispěvatelé: | W7-X Team, Max Planck Institute for Plasma Physics, Max Planck Society |
| Rok vydání: | 2017 |
| Předmět: |
Coupling
Materials science business.industry Mechanical Engineering RF power amplifier Plasma Antenna factor 01 natural sciences 7. Clean energy 010305 fluids & plasmas Magnetic field law.invention Capacitor Optics Nuclear magnetic resonance Nuclear Energy and Engineering law 0103 physical sciences General Materials Science Antenna (radio) 010306 general physics business Monopole antenna Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design |
| ISSN: | 0920-3796 |
| DOI: | 10.1016/j.fusengdes.2017.05.019 |
| Popis: | An ICRH antenna system is under construction to be ready for use in the operational phase 1.2 of W7-X. A two strap antenna, with a surface adapted to the 3D shape of the Last Closed Flux Surface (LCFS) of the standard magnetic configuration (m/n = 5/5), will be installed in the equatorial plane on the low field side of W7-X. The antenna system is optimised for plasma heating and wall conditioning in presence of the magnetic field in the frequency range 25–38 MHz. Each strap is short-circuited on one end, is pre-matched using a tunable capacitor on the other end with connection to the RF power source about halfway in the poloidal direction. To allow optimal coupling to different magnetic configurations in W7-X the antenna can be moved radially over a distance of 350 mm. The cooling circuits in the antenna head are designed to sustain cw W7-X plasma operation in a retracted position and 2 MW ICRH pulses with maximum 10 s duration every 300 s close to the LCFS. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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