The effect of the source magnetic field on the determination of ionization efficiency curves using a sector mass spectrometer
E Henderson; P N K Riley; R D Sedgwick; E Henderson; Chemistry Department, University of Manchester Institute of Science and Technology; P N K Riley; Chemistry Department, University of Manchester Institute of Science and Technology; R D Sedgwick; Chemistry Department, University of Manchester Institute of Science and Technology
Журнал:
Journal of Scientific Instruments
Дата:
1966-10-01
Аннотация:
It is common practice in sector mass spectrometers to focus the ionizing electron beam by using a source magnet. It has been shown that the variation of the focusing effect of this magnetic field with electron energy can produce an apparent `structure' in ionization efficiency curves. A technique for eliminating these instrumental effects, based on a theoretical consideration of the focusing conditions of the electron beam, is described.
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