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High sensitivity pulse-counting mass spectrometer system for noble gas analysisA pulse-counting mass spectrometer is described which is comprised of a new ion source of cylindrical geometry, with exceptional optical properties (the Baur source), a dual focal plane externally adjustable collector slits, and a 17-stage Allen-type electron multiplier, all housed in a metal 21 cm radius, 90 deg magnetic sector flight tube. Mass discrimination of the instrument is less than 1 per mil per mass unit; the optical transmission is more than 90%; the source sensitivity (Faraday collection) is 4 ma/torr at 250 micron emission; and the abundance sensitivity is 30,000.
Document ID
19800062021
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hohenberg, C. M.
(Washington University St. Louis, Mo., United States)
Date Acquired
August 10, 2013
Publication Date
August 1, 1980
Publication Information
Publication: Review of Scientific Instruments
Volume: 51
Subject Category
Instrumentation And Photography
Accession Number
80A46191
Funding Number(s)
CONTRACT_GRANT: NSG-070016
CONTRACT_GRANT: NGL-26-008-065
Distribution Limits
Public
Copyright
Other

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