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Characterizing the transmission properties of an ion funnel
Author(s) -
Lynn Eric C.,
Chung MingChun,
Han ChauChung
Publication year - 2000
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/1097-0231(20001130)14:22<2129::aid-rcm144>3.0.co;2-m
Subject(s) - funnel , chemistry , ion , transmission (telecommunications) , amplitude , atomic physics , electric field , drag , cutoff , radio frequency , computational physics , optics , mechanics , physics , electrical engineering , organic chemistry , quantum mechanics , engineering
The characteristic features of ion transmission properties in a radio‐frequency (RF) electric‐field driven ion funnel using the SIMION ion trajectory simulation package is presented. A user program applying the Douglas ion‐neutral collisional drag coefficient model is incorporated to properly account for the ion focusing and transport effect of the background gas under the effect of the driving RF and a superimposed DC field. The simulated m/z transmission window compares favorably with the experimental results reported by Smith et al. RF amplitude and pressure dependence of experimentally observed m/z transmission windows are also examined, and an approximated effective potential model based on Gerlich's equation is proposed to interpret the low‐ m/z cutoff behavior. A modified ion funnel configuration is described. Copyright © 2000 John Wiley & Sons, Ltd.