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

doi:10.1016/j.jnucmat.2007.01.055

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

Division of Nuclear Fusion Dynamics

Research output: Contribution to journal › Article › peer-review

2 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 language	English
Pages (from-to)	233-237
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	363-365
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jnucmat.2007.01.055
Publication status	Published - 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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10.1016/j.jnucmat.2007.01.055

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In situ measurements of erosion and redeposition during long duration discharges on TRIAM-1M. / Sakamoto, M.; Ogawa, M.; Zushi, H.; Higashijima, A.; Nakashima, H.; Kawasaki, S.; Hasegawa, M.; Idei, H.; Hanada, K.; Nakamura, K.; Sato, K. N.

In: Journal of Nuclear Materials, Vol. 363-365, No. 1-3, 15.06.2007, p. 233-237.

Research output: Contribution to journal › Article › peer-review

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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.",

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AU - Zushi, H.

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AU - Nakashima, H.

AU - Kawasaki, S.

AU - Hasegawa, M.

AU - Idei, H.

AU - Hanada, K.

AU - Nakamura, K.

AU - Sato, K. N.

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