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ion source : ウィキペディア英語版
ion source

An ion source is a device that creates atomic and molecular ions. Ion sources are used to form ions for mass spectrometers, optical emission spectrometers, particle accelerators, ion implanters and ion engines.
==Electron ionization==
(詳細はElectron ionization is widely used in mass spectrometry, particularly for organic molecules. The gas phase reaction producing electron ionization is
:M + e^- \to M^ + 2e^-
where M is the atom of molecule being ionized, e^- is the electron, and M^ is the resulting ion.
The electrons may be created by an arc discharge between a cathode and an anode.
An electron beam ion source (EBIS) is used in atomic physics to produce highly charged ions by bombarding atoms with a powerful electron beam. Its principle of operation is shared by the electron beam ion trap.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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