Millimeter-wave phase-imaging interferometer for the GAMMA 10 tandem mirror

K. Hattori, A. Mase, A. Itakura, M. Inutake, S. Miyoshi, K. Uehara, T. Yonekura, H. Nishimura, K. Miyashita, K. Mizuno

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Abstract

A millimeter-wave phase-imaging interferometer has been developed for the study of density profiles of the GAMMA 10 tandem mirror. The interferometer uses a 70-GHz klystron oscillator and a quasi-optical transmission system. The probe beam is expanded so as to fill an orthogonal view of a plasma cross section. The view is imaged onto a detector array. The detector array consists of beam-lead GaAs Schottky barrier diodes bonded to antennas fabricated using photolithographic techniques on a fused-quartz substrate. Two types of antennas, bow-tie and Yagi-Uda antennas have been used in order to provide an effective matching to millimeter-wave beams, and compared for the performance of an imaging system. The interferometers have been applied to the central-cell and plug-cell plasmas of GAMMA 10.

Original languageEnglish
Pages (from-to)2857-2861
Number of pages5
JournalReview of Scientific Instruments
Volume62
Issue number12
DOIs
Publication statusPublished - Dec 1 1991
Externally publishedYes

ASJC Scopus subject areas

  • Instrumentation

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    Hattori, K., Mase, A., Itakura, A., Inutake, M., Miyoshi, S., Uehara, K., Yonekura, T., Nishimura, H., Miyashita, K., & Mizuno, K. (1991). Millimeter-wave phase-imaging interferometer for the GAMMA 10 tandem mirror. Review of Scientific Instruments, 62(12), 2857-2861. https://doi.org/10.1063/1.1142172