Modification of Reflectron Time-of-Flight Mass Spectrometer for Photodissociation of Mass-Selected Cluster lons
We introduce a modification of reflectron time-of-flight mass spectrometer for laser photodissociation of mass-selected ions. In our apparatus, the ions of interests were selected by a mass gate near the first space focus point and decelerated right after the mass gate, were then crossed by a laser...
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Published in | Chinese journal of chemical physics Vol. 22; no. 6; pp. 655 - 662 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
2009
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Subjects | |
Online Access | Get full text |
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Summary: | We introduce a modification of reflectron time-of-flight mass spectrometer for laser photodissociation of mass-selected ions. In our apparatus, the ions of interests were selected by a mass gate near the first space focus point and decelerated right after the mass gate, were then crossed by a laser beam for dissociation. The daughter ions and surviving parent ions were re-accelerated and analyzed by the reflectron time-of-flight mass spectrometer. Compared to the designs reported by other research groups, our selection-deceleration-dissociation-reacceleration approach has better daughter-parent-ions-separation, easier laser timing, and better overlapping between the ion beam and laser beam. We also conducted detailed cal- culations on the parent ion and daughter ion flight times, and provided a simplified formula for the calibration of daughter ion mass. |
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Bibliography: | 34-1295/O6 X783 V279 Reflectron time-of-flight mass spectrometer, Photodissociation, Mass-selection, Cluster |
ISSN: | 1674-0068 2327-2244 |