Mass spectrometer
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United States of America Patent
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Aug 8, 2006
Grant Date -
Nov 25, 2004
app pub date -
Mar 10, 2004
filing date -
Mar 11, 2003
priority date (Note) -
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Abstract
A mass spectrometer is disclosed comprising an electric field region L.sub.2 wherein a time-varying electric field is applied thereto. In a mode of operation a pulse of ions 3 comprising ions having different mass to charge ratios passes through the electric field region L.sub.2 and the electric field is varied with time such that at least some of the ions 3 having different mass to charge ratios subsequently arrive at the extraction or acceleration region 10 of a Time of Flight mass analyser at substantially the same time.
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