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Production of an Intense, Well-Collimated Submillimeter Wave Beam and Its Application to Plasma Scattering Measurements

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Abstract

Intense submillimeter wavelength radiation (f=354 GHz, P=110 W) from Gyrotron FU II is converted into a well-collimated, linearly-polarized beam by a quasi-optical transmission line consisting of a quasi-optical antenna and several mirrors. The observed focusing of the beam agrees with calculations based on the Huygens equation. We have used this intense beam to study low frequency density fluctuations by plasma scattering in Compact Helical System (CHS) plasmas at the National Institute for Fusion Science.

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Authors and Affiliations

  1. Faculty of Engineering, Fukui University, Fukui, 910-8507, Japan

    I. Ogawa, T. Idehara, A. Sakai, K. Yoshida & T. Tsuchida

  2. National Institute for Fusion Science, Toki, 509-5292, Japan

    K. Kawahata, A. Ejiri, H. Iguchi, K. Tanaka, K. Matsuoka, M. Osakabe, S. Okamura, T. Minami & C. Takahashi

  3. Institut fur Plasmaforschung, Universitat Stuttgart, Pfaffenwaldring 31, D-70569, Stuttgart, Germany

    W. Kasparek

Authors
  1. I. Ogawa
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  2. T. Idehara
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  3. A. Sakai
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  4. K. Yoshida
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  5. T. Tsuchida
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  6. K. Kawahata
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  7. A. Ejiri
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  8. H. Iguchi
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  9. K. Tanaka
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  10. K. Matsuoka
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  11. R. Akiyama
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  12. M. Osakabe
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  13. S. Okamura
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  14. T. Minami
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  15. C. Takahashi
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  16. W. Kasparek
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Ogawa, I., Idehara, T., Sakai, A. et al. Production of an Intense, Well-Collimated Submillimeter Wave Beam and Its Application to Plasma Scattering Measurements. International Journal of Infrared and Millimeter Waves 19, 727–736 (1998). https://doi.org/10.1023/A:1022698309089

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  • DOI: https://doi.org/10.1023/A:1022698309089

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