Annealing Effects on Breakdown Threshold of Radio-frequency Windows.

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  • Annealing Effects on Breakdown Threshol

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Abstract

The breakdown threshold of alumina rf windows depends not only on the bulk characteristics, but also on surface treatments such as polishing and annealing. Sapphire and alumina-ceramic disks, polished and annealed, were examined by high-power tests. The polished disk exhibited a lower threshold value than the annealed one, probably due to its surface charging at defects mechanically introduced by polishing. The elimination of the charged sites present on the surface is considered to be important.

Journal

  • Shinku

    Shinku 40 (5), 436-441, 1997

    The Vacuum Society of Japan

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