Investigating ion-surface collisions with a niobium superconducting tunnel junction detector in a time-of-flight mass spectrometer

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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 ... continued below

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23 pages

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Westmacott, G.; Zhong, F.; Frank, M.; Friedrich, S.; Labov, S. & Benner, W.H. December 1, 1999.

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Description

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.

Physical Description

23 pages

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OSTI as DE00753093

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  • Journal Name: Rapid Communications in Mass Spectrometry; Other Information: Submitted to Rapid Communications in Mass Spectrometry; (1 Dec 1999)

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  • Report No.: LBNL--44341
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 753093
  • Archival Resource Key: ark:/67531/metadc710879

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  • December 1, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 5, 2016, 1:27 p.m.

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Westmacott, G.; Zhong, F.; Frank, M.; Friedrich, S.; Labov, S. & Benner, W.H. Investigating ion-surface collisions with a niobium superconducting tunnel junction detector in a time-of-flight mass spectrometer, article, December 1, 1999; California. (digital.library.unt.edu/ark:/67531/metadc710879/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.