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- W1987304132 abstract "This article is a review of the events leading to the development of the double-focusing tandem mass spectrometer system, which is sometimes called the Johnson-Nier geometry. An essential feature of the geometry is that it eliminates second-order angular aberration, enhancing the sensitivity, without a loss in resolution. Flexibility in the choice of ion source and collector designs is assured because both are outside of regions of electric and magnetic fields. The vacuum housing permits high-temperature baking, ensuring ultrahigh vacuum conditions. Although introduced initially for the purpose of determining precise atomic masses, the design has found its greatest application in studies of structure of heavy molecules, making use of the high resolution to identify fragments. In many cases the composition of a molecule, or fragment, can be deduced from its exact mass by utilizing the known atomic masses of likely constituent atoms." @default.
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- W1987304132 date "1991-12-01" @default.
- W1987304132 modified "2023-10-10" @default.
- W1987304132 title "The development of a high resolution mass spectrometer: A reminiscence" @default.
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- W1987304132 doi "https://doi.org/10.1016/1044-0305(91)80029-7" @default.
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