-
Author(s):
K. Narihara, K. Toi, Y. Hamada, K. Yamauchi, K. Adachi, I. Yamada, K. N. Sato, K. Kawahata, A. Nishizawa, S. Ohdachi, K. Sato, T. Seki, T. Watari, J. Xu, A. Ejiri, S. Hirokura, K. Ida, Y. Kawasumi, M. Kojima, H. Sakakita, T. Ido, K. Kitachi, J. Koog and H. Kuramoto
-
Title:
Observation of Dusts by Laser Scattering Method in the JIPPT-IIU Tokamak
Date of publication:
Mar. 1997
-
Key words:
Plasma wall interaction, impurty, dust, tokamak, JIPP T-IIU
-
Abstract:
Laser scattering signals which indicate the presence of small dusts ( diameter leq 2 mu m) were occasionally observed in the JIPPT-IIU tokamak chamber. This phenomenon was reproduced by deliberately spreading carbon dusts from the top of the vacuum chamber. No noticeable effect on the plasma was observed for dust-fall of up to at least 10^6 dusts (10 mu g) in 20 ms during discharge. Dusts fallen just before the plasma start-up seemed to be confined but soon be ejected in less than 30 ms.
-
|
