Method for estimating the propagation direction of a coherent plasma structure using a one-dimensional diagnostic array

Journal Article · Fri Aug 15 00:00:00 EDT 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4893482· OSTI ID:22314420

Birkenmeier, G.; Wolfrum, E.; Stroth, U. ^[1]; Laggner, F. M. ^[2]; Willensdorfer, M. ^[1]; Inagaki, S.; Itoh, S. -I. ^[3]; Itoh, K. ^[4]

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1. Max Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748 Garching (Germany)
2. Institute of Applied Physics, Vienna University of Technology, 1040 Vienna (Austria)
3. Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580 (Japan)
4. National Institute for Fusion Science, Toki 509-5292 (Japan)

This article proposes a new method to evaluate basic characteristics of the dynamics of a coherent plasma structure (blob). With this method, one can evaluate the propagation angle of a blob in a two-dimensional plasma cross section as well as the blob velocity, size, and amplitude from one-dimensional data. The method is applied to blob measurements from the Lithium beam emission spectroscopy system in ASDEX-Upgrade. Statistical features of the observed blob velocities, angles of propagation, blob sizes, and amplitudes are discussed. The validity of the method is examined by comparing two values of the propagation angle that are evaluated in an independent manner.

• OSTI ID: 22314420
• Journal Information: Review of Scientific Instruments, Vol. 85, Issue 8; Other Information: (c) 2014 AIP Publishing LLC; 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
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
AMPLITUDES
ASDEX TOKAMAK
ATOMIC BEAMS
EMISSION SPECTROSCOPY
LITHIUM
ONE-DIMENSIONAL CALCULATIONS
PLASMA
PLASMA DIAGNOSTICS