Investigating ion-surface collisions with a niobium superconducting tunnel junction detector in a time-of-flight mass spectrometer
| Autor: | Matthias Frank, G. Westmacott, Stephan Friedrich, Simon E. Labov, F. Zhong, W. H. Benner |
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| Rok vydání: | 2000 |
| Předmět: |
Spectrometer
Physics::Instrumentation and Detectors Chemistry Organic Chemistry Analytical chemistry Mass spectrometry Analytical Chemistry law.invention Secondary ion mass spectrometry Time of flight Physics::Plasma Physics Reflectron law Superconducting tunnel junction Microchannel plate detector Atomic physics Spectroscopy Gas chromatography ion detector |
| Zdroj: | Rapid Communications in Mass Spectrometry. 14:600-607 |
| ISSN: | 1097-0231 0951-4198 |
| DOI: | 10.1002/(sici)1097-0231(20000415)14:7<600::aid-rcm915>3.0.co;2-0 |
| Popis: | The performance of an energy sensitive, niobium superconducting tunnel junction detector is investigated by measuring the pulse height produced by impacting molecular and atomic ions at different kinetic energies. Ions are produced by laser resorption and matrix-assisted laser desorption in a time-of-flight mass spectrometer. Results show that the STJ detector pulse height decreases for increasing molecular ion mass, passes through a minimum at around 2000 Da, and the increases with increasing mass of molecular ions above 2000Da. The detector does not show a decline in sensitivity for high mass ions as is observed with microchannel plate ion detectors. These detector plus height measurements are discussed in terms of several physical mechanisms involved in an ion-surface collision. |
| Databáze: | OpenAIRE |
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