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acceleration slits definition
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positively charged ions produced in an ionization chamber of a mass spectrometer are passed into the analyzer by the accleration slits.  Generally, two acceleration slits are used;  one has a slight negative potential with respect to the ionization chamber in order to attract the positive ions, and the other slit has an extremely high voltage which accelerates that ions to up to half the speed of light.

See also:
acyloxyl radicals definition
acyloxyl radicals definition
Activity Series definition
Activity Series definition
Actual Yield definition
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