Accession Number : ADA297378

Title :   Inversion for Mass Spectrometer Multicomponent Sampling.

Descriptive Note : Technical rept.,

Corporate Author : PHILLIPS LAB HANSCOM AFB MA

Personal Author(s) : Sherman, Christopher

PDF Url : ADA297378

Report Date : 22 MAR 1995

Pagination or Media Count : 18

Abstract : A mass spectrometer samples a neutral gas consisting of more than one component. During sampling, the component species are not only ionized, but also fragmented, thus introducing mass fragments not present in the original gas. A method has been developed that uses the resultant measured spectral intensity ratios to find the density or partial pressure ratios of the original components. In addition to spectral intensity ratios, the following is assumed to be known: the fragments produced from each original component; the branching ratios of these fragments; and the ratios of ionization efficiencies for each component pair. Since this method depends only on spectral and ionization ratios, it is in principle (although in practice, not completely) independent of the variable, and often time dependent, characteristics of individual instruments. jg p.3

Descriptors :   *MASS SPECTROSCOPY, RATIOS, NEUTRAL, INTENSITY, EFFICIENCY, GASES, SAMPLING, RELEASE, INSTRUMENTATION, IONIZATION, INVERSION, MASS SPECTROMETERS, SPECTRAL ENERGY DISTRIBUTION, FRAGMENTS, PARTIAL PRESSURE.

Subject Categories : Physical Chemistry
      Test Facilities, Equipment and Methods
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE