W-band millimeter-wave back-scattering system for high wavenumber turbulence measurements in LHD

A 90 GHz W-band millimeter-wave back-scattering system is designed and installed for measuring electron scale turbulence (k⊥ρs ∼ 40). A metal lens relay antenna is used for in-vessel beam focusing, and a beam diameter of less than 40 mm is achieved in the plasma core region. This antenna can be stee...

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Veröffentlicht in:	Review of scientific instruments 2021-04, Vol.92 (4), p.043536-043536
Hauptverfasser:	Tokuzawa, T., Tanaka, K., Tsujimura, T., Kubo, S., Emoto, M., Inagaki, S., Ida, K., Yoshinuma, M., Watanabe, K. Y., Tsuchiya, H., Ejiri, A., Saito, T., Yamamoto, K.
Format:	Artikel
Sprache:	eng
Schlagworte:	Antennas Background noise Corrugated waveguides Diameters Millimeter waves Scattering Scientific apparatus & instruments Transmission loss Turbulence Wavelengths
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