The Development of the boroncoating device for the JFT-2M

Yamamoto, Masahiro*; Okano, Fuminori; Tsuzuki, Kazuhiro; Ogawa, Hiroaki; Suzuki, Sadaaki; Shibata, Takatoshi

JAERI-Tech 2005-061, 11 Pages, 2005/09

JAERI-Tech-2005-061.pdf:0.94MB

Ferritic steel plates were installed in the JFT-2M vacuum vessel to conduct "the Advanced Material Tokamak Experiments (AMTEX)". A coating device with tri-methyl-bron(TMB)was developed to coat the ferritic steel surface with boron, since the ferritic steel is easy to rust and also has a property to absorb much impurity in the surface. The TMB gas used in the device was diluted with helium gas to 1% for ensuring workers themselves against the toxicity of the TMB. The uniformity and stability of the coated layer have been confirmed through sample tests with a microscope, whose samples had been set in the tokamak vacuum vessel. The coating thickness measured with X-ray photoelectron emission spectroscopy was roughly 130nm. In the plasma experiments after the boron coating, radiation loss in the plasma decreased to 1/3, and oxygen impurity also decreased to 1/10 compared to without the boron coating.

Progress of advanced material tokamak experiment (AMTEX) program on JFT-2M

Kimura, Haruyuki; Sato, Masayasu; Kawashima, Hisato; Isei, Nobuaki; Tsuzuki, Kazuhiro; Ogawa, Hiroaki; Ogawa, Toshihide; Miura, Yukitoshi; Yamamoto, Masahiro; Shibata, Takatoshi; et al.

Fusion Engineering and Design, 56-57, p.837 - 841, 2001/10

https://doi.org/10.1016/S0920-3796(01)00362-3

no abstracts in English

Report of International Workshop on Helium Ash Transport and Exhaust, and some topics on PWI research in USA

Nakamura, Hiroo

Kaku Yugo Kenkyu, 66(3), p.326 - 335, 1991/09

no abstracts in English