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Ion-Sensitive Plate Detectors in Mass Spectrometry

Volume 25, Number 2 (April 1971) Page 246-252

McCrea, J.M.

The role of the ion-sensitive plate as an ion detector in contemporary mass spectrometers or spectrographs is discussed in this paper. The plates are mainly used in instruments of the Mattauch-Herzog geometry for detecting ions with mass-to-charge ratios from 1 to well over 1000. The energies of the ions detected usually lie in the range from 5 to 75 keV. The type Q2 low-gelatin plate is widely used in both organic structure studies by the electron bombardment method and elemental analysis of metals and inorganics by the spark source method. In addition to detectors with low-gelatin emulsions, those with centrifuged emulsions or vapor deposited films are also used for special applications, as are ion-to-light and ion-to-electron converters.