Double resonance ejection in a micro ion trap mass spectrometer.
Ion ejection from a cylindrical micro ion trap by resonance excitation of the secular motion is observed to be strongly dependent on the frequency of the secular motion at resonance. Both the intensity of the ion signal and the mass resolution of the resulting mass spectrum are increased when the ion secular frequency is approximately that of a nonlinear resonance of the trap. The resonances are attributed to electrical as well as geometrical considerations.
Moxom
Jeremy
J
Oak Ridge National Laboratory, P.O. Box 2008 MS 6142, Oak Ridge, TN 37831-6142, USA.
Reilly
Peter T A
PT
Whitten
William B
WB
Ramsey
J Michael
JM