In situ measurements of erosion and redeposition during long duration discharges on TRIAM-1M

M. Sakamoto, M. Ogawa, H. Zushi, A. Higashijima, H. Nakashima, S. Kawasaki, M. Hasegawa, H. Idei, K. Hanada, K. Nakamura, K. N. Sato

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5 Citations (Scopus)

Abstract

An in situ and real time measurement system of erosion and deposition has been developed, which is based on interference of light on a thin semi-transparent layer of redeposited material on substrate. It has been applied to long duration discharges in TRIAM-1M. The sapphire window is used as substrate. The deposition pattern on the window indicates up down and toroidal asymmetry. In the 5 h 16 min discharge, the thickness of the deposited layer increased monotonically with time and its deposition rate is ∼1.5 × 1016 Mo m-2 s-1. In the low density and long duration discharge, the Mo deposition rate on the window depends on the ratio of Mo flux to hydrogen flux.

Original languageEnglish
Pages (from-to)233-237
Number of pages5
JournalJournal of Nuclear Materials
Volume363-365
Issue number1-3
DOIs
Publication statusPublished - Jun 15 2007

All Science Journal Classification (ASJC) codes

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

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