Multichannel Langmuir probe for turbulence study in Heliotron J

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3496980· OSTI ID:22055857

Ohshima, S ^[1]; Yamamoto, S; Takeuchi, M; Nagasaki, K; Mizuuchi, T; Okada, H; Minami, T; Kobayashi, S; Hanatani, K; Konoshima, S; Sano, F ^[1]

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1. Institute of Advanced Energy, Kyoto University, Kyoto 611-0011 (Japan)

New multichannel Langmuir probe system was developed and installed to Heliotron J. The objective of the new probe is to characterize basic turbulence property and the resulting transport in advanced helical configuration. The probe developed here consists of four sets of triple probe and one pin for floating potential measurement. Initial experiments in neutral beam heating plasma were conducted and fluctuation profile of radial and poloidal electric fields and Reynolds stress were estimated. For precise evaluation of the electric fields and Reynolds stress, a technique to compensate radial change of tilt angle between probe array and magnetic surface was proposed and applied to the initial results obtained in edge region of Heliotron J where the complicated magnetic structure exists.

• OSTI ID: 22055857
• Journal Information: Review of Scientific Instruments, Vol. 81, Issue 10; Other Information: (c) 2010 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
ELECTRIC FIELDS
FLUCTUATIONS
HELICAL CONFIGURATION
HELIOTRON
LANGMUIR PROBE
MAGNETIC SURFACES
PARTICLE BEAMS
PLASMA
PLASMA HEATING
REYNOLDS NUMBER
STRESSES
TURBULENCE