Observation of dust particles by a laser scattering method in the JIPPT-IIU tokamak

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. SakakitaT. Ido, K. Kitachi, J. Koog, H. Kuramoto

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Abstract

Laser scattering signals that indicate the presence of small dust particles (diameter ≤ 2 μm) have been occasionally observed in the JIPPT-IIU tokamak chamber. This phenomenon was reproduced deliberately by spreading carbon dust from the top of the vacuum chamber. No noticeable effect on the plasma was observed for dust falls of up to at least 106 particles (10 μg) in 20 ms during discharges. Dust falling just before plasma startup seemed to be confined but it was soon ejected (in less than 30 ms).

Original languageEnglish
Pages (from-to)1177-1182
Number of pages6
JournalNuclear Fusion
Volume37
Issue number8
DOIs
Publication statusPublished - Aug 1 1997
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Narihara, K., Toi, K., Hamada, Y., Yamauchi, K., Adachi, K., Yamada, I., ... Kuramoto, H. (1997). Observation of dust particles by a laser scattering method in the JIPPT-IIU tokamak. Nuclear Fusion, 37(8), 1177-1182. https://doi.org/10.1088/0029-5515/37/8/I12