Fine positioning of a poloidal probe array

Journal Article · Sat Dec 15 00:00:00 EST 2007 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.2818796· OSTI ID:21024678

Yamada, T; Nagashima, Y; Inagaki, S; Kawai, Y; Yagi, M; Itoh, S -I; Maruta, T; Shinohara, S; Terasaka, K; Kawaguchi, M; Fukao, M; Fujisawa, A; Itoh, K ^[1]; Myojocho, Uji 611-0014 ^[2]

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1. Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580 (Japan)
2. Japan

Multipoint detection is an essential requirement for investigating plasma turbulence which is a highly nonlinear phenomenon in space and time. We have fabricated an array of 64-channel poloidal probes surrounding the linear cylindrical plasma named LMD-U in order to study turbulence properties, particularly the nonlinear mode couplings, in the domain of poloidal wave number and frequency. However, misalignments of probe tips produce spurious modes, which do not exist in the real plasma, to distort the precise wave number measurements. The paper presents the description of the 64-channel poloidal probe array with means to adjust the probe positions, with discussion on the effects of the misalignments on the wave number measurements.

• OSTI ID: 21024678
• Journal Information: Review of Scientific Instruments, Vol. 78, Issue 12; Other Information: DOI: 10.1063/1.2818796; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CYLINDRICAL CONFIGURATION
DETECTION
NONLINEAR PROBLEMS
PLASMA
POSITIONING
PROBES
SPACE
TURBULENCE