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First bushing ring for neutral beam produced
A prototype of the five bushing rings that serve as insulators on ITER's neutral beam heating system has been produced at KYOCERA Corporation and passed testing of the metalizing/brazing process at Hitachi Haramachi Electronics Company in Japan.
The bushing rings connect the high pressure transmission lines for the 1 megavolt power supply with the vacuum chamber inside the neutral beam system. The rings are made of a special ceramic (alumina) with conductor plates brazed for the electrical connections and measure 1.46 metres in diameter.
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