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A comparison between ion‐to‐photon and microchannel plate detectors
Author(s) -
Dubois F.,
Knochenmuss R.,
Zenobi R.,
Brunelle A.,
Deprun C.,
Le Beyec Y.
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(19990515)13:9<786::aid-rcm566>3.0.co;2-3
Subject(s) - microchannel plate detector , ion , detector , chemistry , photon , mass spectrometry , microchannel , electron , atomic physics , secondary electrons , secondary ion mass spectrometry , analytical chemistry (journal) , optics , nuclear physics , physics , chromatography , organic chemistry , thermodynamics
An alternative detector for time‐of‐flight mass spectrometry, the ion‐to‐photon detector, detecting light produced when ions impact a surface coated with a fluorescent compound, was compared to a conventional microchannel plate detector. Single ion experiments showed that, for a given energy, the efficiency of the ion‐to‐photon detector relative to the microchannel plate detector decreases as the molecular mass of the impinging ion increases. This decrease becomes less pronounced for larger ions. Seen as a function of the ion velocity, a linear relationship was found. The conversions into photons and electrons were also compared. It was found that 22 keV ions up to 150 Da produced more photons than secondary electrons. For larger ions at this energy, the opposite was observed. Copyright © 1999 John Wiley & Sons, Ltd.