Synergistic effects of high-heat loading, hydrogen and impurity deposition on surface modification of a tokamak limiter

N. Yoshida; K. Tokunaga; T. Muroga; Y. Miyamoto; S. Itoh

doi:10.1016/0022-3115(88)90285-1

Synergistic effects of high-heat loading, hydrogen and impurity deposition on surface modification of a tokamak limiter

N. Yoshida, K. Tokunaga, T. Muroga, Y. Miyamoto, S. Itoh

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

2 Citations (Scopus)

Abstract

The surface modification of a fixed molybdenum limiter used in TRIAM-1 was examined by means of SEM, EDS, and optical microscopy to identify the responsible modification mechanism. On the electron drift side, high-heat loading due to off-normal plasma operation and deposited impurities are the major factors which determine the mode of surface modifications. On the ion drift side local heat loading by arcing, hydrogen ion bombardment, and impurity deposition are the major surface modification processes.

Original language	English
Pages (from-to)	431-437
Number of pages	7
Journal	Journal of Nuclear Materials
Volume	155-157
Issue number	PART 1
DOIs	https://doi.org/10.1016/0022-3115(88)90285-1
Publication status	Published - Jul 2 1988

All Science Journal Classification (ASJC) codes

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

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abstract = "The surface modification of a fixed molybdenum limiter used in TRIAM-1 was examined by means of SEM, EDS, and optical microscopy to identify the responsible modification mechanism. On the electron drift side, high-heat loading due to off-normal plasma operation and deposited impurities are the major factors which determine the mode of surface modifications. On the ion drift side local heat loading by arcing, hydrogen ion bombardment, and impurity deposition are the major surface modification processes.",

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AU - Yoshida, N.

AU - Tokunaga, K.

AU - Muroga, T.

AU - Miyamoto, Y.

AU - Itoh, S.

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AB - The surface modification of a fixed molybdenum limiter used in TRIAM-1 was examined by means of SEM, EDS, and optical microscopy to identify the responsible modification mechanism. On the electron drift side, high-heat loading due to off-normal plasma operation and deposited impurities are the major factors which determine the mode of surface modifications. On the ion drift side local heat loading by arcing, hydrogen ion bombardment, and impurity deposition are the major surface modification processes.

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