ＺｒＯ／Ｗ（１００）熱電界放射陰極のリング状パターンの縮小速度

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タイトル別名
  • Collapsing rate of ring structures on the emission patterns from ZrO/W(100) thermal field emission cathodes.
  • ZrO W 100 ネツ デンカイ ホウシャ インキョク ノ リングジョウ パ

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Ring structures can be seen on the emission patterns of a ZrO/W (100) thermal field emission cathode, when the operating condition is not adequate. The rings collapse with operating time so that the collapsing has a tight relation to the emission current fluctuations at very low frequencies. The collapsing rates of the ring structures are measured under several oxygen partial pressures and cathode temperatures. The results show that the collapsing rate does not change monotonically with the cathode temperature, but it showes an U shaped change with increasing cathode temperatures. The U shaped curves shift to the lower temperature when oxygen partial pressure is decreased and/or the applied voltage is increased.

収録刊行物

  • 真空

    真空 31 (6), 615-620, 1988

    一般社団法人 日本真空学会

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