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

T. Kobayashi, G. Birkenmeier, E. Wolfrum, F. M. Laggner, M. Willensdorfer, U. Stroth, S. Inagaki, S.-I. Itoh, K. Itoh
2014 Review of Scientific Instruments  
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 (Li-BES) system in ASDEX-Upgrade (AUG). Statistical features of the observed blob velocities, angles
more » ... 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.
doi:10.1063/1.4893482 pmid:25173269 fatcat:qbomum62vnchvmlfli2el76jde