As part of a research program in spark-source solids mass spectrometry, the photon and ion response characteristics of various types of detector plates have been determined. Outgassing behavior of the plates in high-vacuum service has also been evaluated by empirical tests in a mass-spectrometer
system. Conventional ion-sensitive plates are compared and contrasted on the basis of log-probability response curves. Various development procedures are classified by the nature of the response curves and by the extent of processing fog. Coating analyses and microstructure are related to
the response properties of some emulsions. Development of an emulsion with much higher ion sensitivities than the present SWR and Q plates is forecast.
Applied Research Laboratory, United States Steel Corporation, Monroeville, Pennsylvania 15146
Publication date: May 1, 1966
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