“gas focusing”的概念、定义、翻译、参考文献-科学参考

单词	gas focusing
释义	gas focusing [`gas ´fō·kǝs·iŋ] ^ELECTRONICS A method of concentrating an electron beam by utilizing the residual gas in a tube; beam electrons ionize the gas molecules, forming a core of positive ions along the path of the beam which attracts beam electrons and thereby makes the beam more compact. Also known as ionic focusing.
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