Noise reduction in negative-ion quadrupole mass spectrometry

Patent · Fri Jan 01 00:00:00 EST 1993

OSTI ID:868753

Chastagner, Philippe ^[1]

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1. 3134 Natalie Cir., Augusta, GA 30909-2748

A quadrupole mass spectrometer (QMS) system having an ion source, quadrupole mass filter, and ion collector/recorder system. A weak, transverse magnetic field and an electron collector are disposed between the quadrupole and ion collector. When operated in negative ion mode, the ion source produces a beam of primarily negatively-charged particles from a sample, including electrons as well as ions. The beam passes through the quadrupole and enters the magnetic field, where the electrons are deflected away from the beam path to the electron collector. The negative ions pass undeflected to the ion collector where they are detected and recorded as a mass spectrum.

• Research Organization: Savannah River Site (SRS), Aiken, SC (United States)
• DOE Contract Number: AC09-89SR18035
• Assignee: Chastagner, Philippe (3134 Natalie Cir., Augusta, GA 30909-2748)
• Patent Number(s): US 5204530
• OSTI ID: 868753
• Country of Publication: United States
• Language: English

Related Subjects

noise
reduction
negative-ion
quadrupole
mass
spectrometry
spectrometer
qms
source
filter
collector
recorder
weak
transverse
magnetic
field
electron
disposed
operated
negative
mode
produces
beam
primarily
negatively-charged
particles
sample
including
electrons
passes
enters
deflected
path
pass
undeflected
detected
recorded
spectrum
quadrupole mass
mass filter
beam passes
mass spectrometer
charged particles
magnetic field
charged particle
mass spectrometry
beam path
transverse magnetic
electron collector
source produces
noise reduction
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