METHOD AND APPARATUS FOR EJECTING UNWANTED IONS IN AN ION TRAP MASS SPECTROMETER

METHOD AND APPARATUS FOR EJECTING UNWANTED IONS IN AN ION TRAP MASS SPECTROMETER

A method and apparatus is described which determines a plurality of spaced discrete frequencies covering the range of frequencies of the characteristic mot ion of unwanted ions and processes said discrete frequencies to generate a plurality of time dependent voltage amplitude values which vary throu...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: TAYLOR, DENNIS MILTON, LOURIS, JOHN NATHAN
Format: Patent
Sprache:eng ; fre
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Beschreibung
Zusammenfassung:A method and apparatus is described which determines a plurality of spaced discrete frequencies covering the range of frequencies of the characteristic mot ion of unwanted ions and processes said discrete frequencies to generate a plurality of time dependent voltage amplitude values which vary throughout the time domain such th at the frequency content of said plurality of time dependent voltage amplitude valu es is relatively uniform over the entire time domain, and such that the magnitude asso ciated with the discrete frequencies is relatively uniform over the frequency domain.