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

Journal Article · Sun Dec 01 04:00:00 EST 1991 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1142172· OSTI ID:6379693

Hattori, K; Mase, A; Itakura, A; Inutake, M; Miyoshi, S ^[1]; Uehara, K; Yonekura, T; Nishimura, H; Miyashita, K; Mizuno, K ^[2]

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1. Plasma Research Center, University of Tsukuba, Tsukuba 305 (Japan)
2. Research Institute of Electrical Communication, Tohoku University, Sendai 980 (Japan)

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.

• OSTI ID: 6379693
• Journal Information: Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 62:12; ISSN RSINA; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320* -- Plasma Diagnostic Techniques & Instrumentation-- (1992-)
DESIGN
INTERFEROMETERS
MAGNETIC MIRRORS
MEASURING INSTRUMENTS
OPEN PLASMA DEVICES
OPTICAL SYSTEMS
PLASMA DENSITY
PLASMA DIAGNOSTICS
SCHOTTKY BARRIER DIODES
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
TANDEM MIRRORS
THERMONUCLEAR DEVICES