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Improvement of an electron beam facility as a heat source for disruption simulation experiments

Masahiro Seki, Seiichiro Yamazaki, Akio Minato, Tomoyoshi Horie, Tatsuzo Tone1987年Fusion Engineering and DesignIF 1.7出版社

To perform simulated plasma disruption experiments, a heat source which can provide fast rise and high heat flux on a target surface is required. An existing electron beam facility has been improved to provide higher heat fluxes uniformly over a wider area by installing a high speed beam rastering system. The beam rastering coils can provide a beam oscillation angle of 4.4° with a frequency of up to 400 kHz. The high frequency ensures temporal uniformity of the heat flux on a test surface. Triangular wave shaped current is supplied to excite the coils to provide spatially uniform heat flux over a test surface. Using this electron beam facility, we can provide uniform heat fluxes as high at 160 MW/m2 on an area of 13 mm × 13 mm, and 20 MW/m2 on 38 m × 38 mm.

日本語訳

模擬プラズマディスラプション実験を行うためには、ターゲット表面に高速立ち上がりかつ高熱流束を提供できる熱源が必要である。既存の電子ビーム装置は、高速ビームラスタリングシステムを設置することにより、より広い面積にわたって均一に、より高い熱流束を提供できるように改良された。ビームラスタリングコイルは、最大400 kHzの周波数で4.4°のビーム振れ角を提供できる。この高い周波数により、試験表面における熱流束の時間的均一性が確保される。コイルを励磁するために三角波電流が供給され、試験表面全体に空間的に均一な熱流束が提供される。この電子ビーム装置を用いることで、13 mm × 13 mmの面積で最大160 MW/m²、38 m × 38 mmの面積で20 MW/m²の均一な熱流束を提供できる。

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