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Measuring Transmission Efficiencies Of Mass SpectrometersCoincidence counts yield absolute efficiencies. System measures mass-dependent transmission efficiencies of mass spectrometers, using coincidence-counting techniques reminiscent of those used for many years in calibration of detectors for subatomic particles. Coincidences between detected ions and electrons producing them counted during operation of mass spectrometer. Under certain assumptions regarding inelastic scattering of electrons, electron/ion-coincidence count is direct measure of transmission efficiency of spectrometer. When fully developed, system compact, portable, and used routinely to calibrate mass spectrometers.
Document ID
19890000293
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Srivastava, Santosh K.
(Caltech)
Date Acquired
August 14, 2013
Publication Date
June 1, 1989
Publication Information
Publication: NASA Tech Briefs
Volume: 13
Issue: 6
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
NPO-16989
Accession Number
89B10293
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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