The observation of dust behavior in TRIAM-1M

K. Sasaki, K. Hanada, N. Nishino, M. Tokitani, N. Yoshida, K. N. Sato, H. Zushi, K. Nakamura, M. Sakamoto, H. Idei, M. Hasegawa, S. Kawasaki, H. Nakasihma, A. Higashijima

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Abstract

The observation of dusts in plasmas was carried out by high speed camera in full non-inductive lower hybrid current drive (LHCD) plasma on TRIAM-1M. The velocities of dusts were 10-50 m/s. The number of dust generated per second increased with the discharge duration in the range of 20-57 s. This suggests that a part of dusts were generated from a movable limiter whose the surface temperature increases with the discharge duration. Dusts were coming from various directions even close to the movable limiter. Dusts were collected in the vacuum vessel by use of a kind of cleaner and the composition and the size of dust were examined by Scanning Electron Microscope (SEM). Dust size was several μm and composition was Molybdenum mixed with small amount of elements of stainless metal. The poloidal distribution of the collected mass of dusts was almost uniform.

Original languageEnglish
Pages (from-to)238-241
Number of pages4
JournalJournal of Nuclear Materials
Volume363-365
Issue number1-3
DOIs
Publication statusPublished - Jun 15 2007

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Cite this

Sasaki, K., Hanada, K., Nishino, N., Tokitani, M., Yoshida, N., Sato, K. N., ... Higashijima, A. (2007). The observation of dust behavior in TRIAM-1M. Journal of Nuclear Materials, 363-365(1-3), 238-241. https://doi.org/10.1016/j.jnucmat.2007.01.199