High heat flux damage of the guard limiter in Heliotron E

M. Fujitsuka; T. Shikama; N. Noda; H. Shinno; T. Tanabe; T. Mutoh; A. Iiyoshi

doi:10.1016/0022-3115(89)90396-6

High heat flux damage of the guard limiter in Heliotron E

M. Fujitsuka, T. Shikama, N. Noda, H. Shinno, T. Tanabe, T. Mutoh, A. Iiyoshi

Institute for Materials Research (IMR)

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

Abstract

We examined the limiter-plates of the side protectors of the ICRF antennae in Heliotron E at Kyoto University, which were damaged by high-heat-flux loading. The limiter plates were exposed to about 5000 discharges during one year of operation. The metallurgical examinations revealed that the heat flux had been more than 100 kW/cm² and about 2.5-8% of total plasma energy. The damaged area had been loaded with 100-160 kJ. It is estimated that 10²¹ manganese atoms were released into the plasma by this high-heat-flux damage of the limiter plates. The high-heat-flux damage generated cracks in the plates. Some of the cracks propagated into the unmelted parts. The damaged parts were found to contain a ferromagnetic phase.

Original language	English
Pages (from-to)	976-981
Number of pages	6
Journal	Journal of Nuclear Materials
Volume	162-164
Issue number	C
DOIs	https://doi.org/10.1016/0022-3115(89)90396-6
Publication status	Published - 1989 Apr 1

Keywords

Heliotron E
guard limiter
high-heat-flux
melt
re-solidify

ASJC Scopus subject areas

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

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abstract = "We examined the limiter-plates of the side protectors of the ICRF antennae in Heliotron E at Kyoto University, which were damaged by high-heat-flux loading. The limiter plates were exposed to about 5000 discharges during one year of operation. The metallurgical examinations revealed that the heat flux had been more than 100 kW/cm2 and about 2.5-8% of total plasma energy. The damaged area had been loaded with 100-160 kJ. It is estimated that 1021 manganese atoms were released into the plasma by this high-heat-flux damage of the limiter plates. The high-heat-flux damage generated cracks in the plates. Some of the cracks propagated into the unmelted parts. The damaged parts were found to contain a ferromagnetic phase.",

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AU - Fujitsuka, M.

AU - Shikama, T.

AU - Noda, N.

AU - Shinno, H.

AU - Tanabe, T.

AU - Mutoh, T.

AU - Iiyoshi, A.

PY - 1989/4/1

Y1 - 1989/4/1

N2 - We examined the limiter-plates of the side protectors of the ICRF antennae in Heliotron E at Kyoto University, which were damaged by high-heat-flux loading. The limiter plates were exposed to about 5000 discharges during one year of operation. The metallurgical examinations revealed that the heat flux had been more than 100 kW/cm2 and about 2.5-8% of total plasma energy. The damaged area had been loaded with 100-160 kJ. It is estimated that 1021 manganese atoms were released into the plasma by this high-heat-flux damage of the limiter plates. The high-heat-flux damage generated cracks in the plates. Some of the cracks propagated into the unmelted parts. The damaged parts were found to contain a ferromagnetic phase.

AB - We examined the limiter-plates of the side protectors of the ICRF antennae in Heliotron E at Kyoto University, which were damaged by high-heat-flux loading. The limiter plates were exposed to about 5000 discharges during one year of operation. The metallurgical examinations revealed that the heat flux had been more than 100 kW/cm2 and about 2.5-8% of total plasma energy. The damaged area had been loaded with 100-160 kJ. It is estimated that 1021 manganese atoms were released into the plasma by this high-heat-flux damage of the limiter plates. The high-heat-flux damage generated cracks in the plates. Some of the cracks propagated into the unmelted parts. The damaged parts were found to contain a ferromagnetic phase.

KW - Heliotron E

KW - guard limiter

KW - high-heat-flux

KW - melt

KW - re-solidify

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High heat flux damage of the guard limiter in Heliotron E

Abstract

Keywords

ASJC Scopus subject areas

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