TANDEM ION TRAPPING ARRANGEMENT

摘要

A mass spectrometer is disclosed comprising a first storage ion trap (2) arranged upstream of a high performance analytical ion trap (3). According to an embodiment ions are simultaneously scanned from both the first and second ion trap (2, 3). At any instant in time the quantity of charge present within the second ion trap (3) is limited or restricted so that the second ion trap (3) does not suffer from space charge saturation effects and hence the performance of the second ion trap (3) is not degraded.