Determination of ion frequencies in a qu
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Stephen A. Lammert; Curtis D. Cleven; R.Graham Cooks
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Article
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1994
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Elsevier Science
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English
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A new technique has been developed which allows the direct measurement of frequencies of ions trapped in a quadrupole ion trap mass spectrometer. This pump/probe method employs a fast direct current (DC) pulse (pump) to displace a kinetically cooled ion population from the center of the trap, and a