FULL TEXT (PDF, 190KB)
N. Ashikawa, Y. Tomita, S. Masuzaki, A. Sagara, G. Kawamura, K. Nishimura, N. Ohno and LHD experimental group
Characterization of heated dust particles using infrared and dynamic images in LHD
Date of publication:
21 IAEA Fusion Energy Conference, EX/P4-7
To investigate the dust properties, their movements were observed by a high-speed (time resolution of 5.3 ms) infrared camera in the Large Helical Device (LHD). Heated dust velocities were estimated to be 1-15 m/s in this experiment. We propose a method for revealing the three-dimensional position of heated dust particles using real and reflected images on the wall observed by an infrared camera. A simple theoretical model shows that the sizes of dust particles have been estimated using experimental observations, such as change of dust velocity and the background plasma parameters.
List of NIFS Report (2008)Return toContents Page Return toNIFS Homepage