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单词 ion spot
释义

Definition of ion spot in English:

ion spot

noun
Chemistry Physics
  • 1A small area struck by a beam of ions.

  • 2A dark spot in the middle of the screen of a cathode ray tube where the phosphor is damaged as a result of ion burn.

  • 3A white spot in a television picture produced as a spurious signal when ionized gas molecules strike the target of a television camera tube.

Origin

1930s; earliest use found in The Physical Review.

Definition of ion spot in US English:

ion spot

noun
Chemistry Physics
  • 1A small area struck by a beam of ions.

  • 2A dark spot in the middle of the screen of a cathode ray tube where the phosphor is damaged as a result of ion burn.

  • 3A white spot in a television picture produced as a spurious signal when ionized gas molecules strike the target of a television camera tube.

Origin

1930s; earliest use found in The Physical Review.

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更新时间:2025/7/4 20:14:31