title: Method for estimating the propagation direction of a coherent plasma structure using a one-dimensional diagnostic array.
abstract: 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.
authors.affiliation: Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kobayashi
authors.affiliation: Max Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748 Garching, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Birkenmeier
authors.affiliation: Max Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748 Garching, Germany.
authors.forename: E
authors.initials: E
authors.lastname: Wolfrum
authors.affiliation: Institute of Applied Physics, Vienna University of Technology, 1040 Vienna, Austria.
authors.forename: F M
authors.initials: FM
authors.lastname: Laggner
authors.affiliation: Max Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748 Garching, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Willensdorfer
authors.affiliation: Max Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748 Garching, Germany.
authors.forename: U
authors.initials: U
authors.lastname: Stroth
authors.affiliation: Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Inagaki
authors.affiliation: Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan.
authors.forename: S-I
authors.initials: SI
authors.lastname: Itoh
authors.affiliation: National Institute for Fusion Science, Toki 509-5292, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Itoh