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  Performance of a remote steering antenna for ECRH/ECCD applications in ITER using a four-wall corrugated square waveguide

Kasparek, W., Gantenbein, G., Plaum, B., Wacker, R., Chirkov, A. V., Denisov, G. G., et al. (2003). Performance of a remote steering antenna for ECRH/ECCD applications in ITER using a four-wall corrugated square waveguide. Nuclear Fusion, 43, 1505-1512. doi:10.1088/0029-5515/43/11/023.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-3C61-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-3C62-4
Genre: Journal Article

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 Creators:
Kasparek, W.1, Author
Gantenbein, G.1, Author
Plaum, B.2, Author              
Wacker, R.1, Author
Chirkov, A. V.1, Author
Denisov, G. G.1, Author
Kuzikov, S. V.1, Author
Ohkubo, K.1, Author
Hollmann, F.2, Author              
Wagner, D.3, Author              
Affiliations:
1Institut für Plasmaforschung, Pfaffenwaldring 31, D-70569 Stuttgart, Germany;Institute of Applied Physics, Russian Academy of Sciences, 603600 Nizhny Novgorod, Russia; National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, 509-5292, Japan, ou_persistent22              
2External Organizations, ou_persistent22              
3Experimental Plasma Physics 2 (E2), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856292              

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 Abstract: For the upper electron cyclotron wave launcher on the international thermonuclear experimental reactor (ITER), the use of a 'remote steering antenna' based on the imaging properties of square waveguides is planned. To characterize launchers of this type, low-power experiments on a four-side corrugated square waveguide, with a scanning mirror at the input of the waveguide, were performed in the frequency range 140–160 GHz. It is shown that elliptical polarization, which is necessary for the electron cyclotron current drive (ECCD), can be transmitted without depolarization and that the usable steering range of the antenna is at least 20°. Low-power measurements demonstrate that mitre bends can be integrated into the waveguide, practically without extra loss. Detailed calorimetric measurements for this set-up confirm this statement for the polarization perpendicular to the scanning plane, whereas excess loss is measured for the parallel polarization. Various modifications of mitre bends are investigated and results are discussed.

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Language(s): eng - English
 Dates: 2003
 Publication Status: Published in print
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 Rev. Method: Peer
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Title: Nuclear Fusion
  Alternative Title : Nucl. Fusion
Source Genre: Journal
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Pages: - Volume / Issue: 43 Sequence Number: - Start / End Page: 1505 - 1512 Identifier: -