Static and dynamic properties of wall recycling in TRIAM-1M

M. Sakamoto, H. Nakashima, S. Kawasaki, A. Iyomasa, S. V. Kulkarni, Makoto Hasegawa, Eriko Jotaki, H. Zushi, Kazuo Nakamura, Kazuaki Hanada, Sanae Itoh

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


A large difference between properties of wall recycling in the continuous gas feed case (i.e. static condition) and the additional gas puff case (i.e. dynamic condition) has been observed. In the static condition, the effective particle confinement time, τp*, increases almost linearly to about 10 s during the 1 min discharge. In the dynamic condition, τp* is 0.2-0.3 s during the 1 min discharge. This difference of τp* is also confirmed in the ultra-long discharge. τp* in the static condition becomes ̃100 s before the global balance between particle absorption and release of the wall is achieved at t ̃ 30 min. τp* in the dynamic condition is, however, still on the order of ~0.3 s. The large difference between τp* in the static and dynamic conditions is attributed to a reduction in the recycling coefficient due to enhanced wall pumping resulting from the gas puff.

Original languageEnglish
Pages (from-to)519-523
Number of pages5
JournalJournal of Nuclear Materials
Issue numberSUPPL.
Publication statusPublished - Mar 1 2003
EventPlasma - Surface Interactions in Controlled Fusion Devices - Gifu, Japan
Duration: May 26 2002May 31 2002

All Science Journal Classification (ASJC) codes

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


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