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A novel scheme for the time‐of‐flight analysis of extended ion packets
Author(s) -
Moskovets Eugene,
Vertes Akos
Publication year - 1999
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(19991130)13:22<2244::aid-rcm781>3.0.co;2-h
Subject(s) - chemistry , microchannel plate detector , ion , electric field , network packet , reflector (photography) , microchannel , homogeneous , time of flight , detector , electromagnetic shielding , atomic physics , computational physics , optics , mechanics , physics , statistical physics , light source , chromatography , computer network , organic chemistry , quantum mechanics , computer science
A new scheme is proposed for providing enhanced time‐of‐flight focusing of spatially extended ion packets moving with close to uniform velocity, sufficiently high for reliable ion detection. The arrangement consists of two decelerating regions with homogeneous electric fields similar to the two‐stage ion reflector. The decelerating field in the first decelerating stage is created in a pulsed fashion after the ion packet has entered the first region. The effect of fringe fields produced by shielding rings and the microchannel plate detector is discussed. Copyright © 1999 John Wiley & Sons, Ltd.