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 | |
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