Possible systematic error in molecular beam time-of-flight analysis with a quadrupole mass spectrometer

H. R. Siddiqui, Arshad Khan, P. E. Siska

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Substantial error in estimating widths of supersonic molecular beam speed distributions can result when using a conventional quadrupole mass spectrometer in pulse-counting mode as a molecular beam detector. This results mainly from improper discriminator settings reached in attempting to maximize signal to background. The effect is illustrated with measurements on a nominally Mach-10 helium supersonic beam.

Original languageEnglish (US)
Pages (from-to)1940-1941
Number of pages2
JournalReview of Scientific Instruments
Volume53
Issue number12
DOIs
StatePublished - Dec 1 1982

Fingerprint

Molecular beams
Systematic errors
Mass spectrometers
systematic errors
molecular beams
mass spectrometers
quadrupoles
discriminators
Discriminators
Mach number
Helium
counting
estimating
helium
Detectors
detectors
pulses

All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

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abstract = "Substantial error in estimating widths of supersonic molecular beam speed distributions can result when using a conventional quadrupole mass spectrometer in pulse-counting mode as a molecular beam detector. This results mainly from improper discriminator settings reached in attempting to maximize signal to background. The effect is illustrated with measurements on a nominally Mach-10 helium supersonic beam.",
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Possible systematic error in molecular beam time-of-flight analysis with a quadrupole mass spectrometer. / Siddiqui, H. R.; Khan, Arshad; Siska, P. E.

In: Review of Scientific Instruments, Vol. 53, No. 12, 01.12.1982, p. 1940-1941.

Research output: Contribution to journalArticle

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AB - Substantial error in estimating widths of supersonic molecular beam speed distributions can result when using a conventional quadrupole mass spectrometer in pulse-counting mode as a molecular beam detector. This results mainly from improper discriminator settings reached in attempting to maximize signal to background. The effect is illustrated with measurements on a nominally Mach-10 helium supersonic beam.

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