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Optimization of the mass reflector parameters for direct ion extraction
Author(s) -
Moskovets Eugene
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/(sici)1097-0231(20000215)14:3<150::aid-rcm857>3.0.co;2-h
Subject(s) - electric field , chemistry , ion , reflector (photography) , range (aeronautics) , microsecond , mass distribution , extraction (chemistry) , time of flight , atomic physics , optics , analytical chemistry (journal) , physics , aerospace engineering , chromatography , light source , organic chemistry , engineering , quantum mechanics , galaxy
The parameters of a mass reflector combined with direct ion extraction are optimized to reduce the time‐of‐flight spread caused by the initial velocity distribution of ions. Under the assumption that the initial ion velocity distribution is mass independent, one can find the mass range where the spread reaches its minimum by varying the electric field in the ion mirror. The mass dependence of this particular time‐of‐flight spread can be diminished when the electric field in the ion mirror changes with time. This was theoretically demonstrated for the mass region 5 × 10 3 < m < 10 5 Da, under conditions where the electric field in the mirror increases by approximately 20% during a time interval of several hundred microseconds. Copyright © 2000 John Wiley & Sons, Ltd.