Electron source for a mini ion trap mass spectrometer

Patent · 01 January 1995

OSTI ID:870214

Dietrich, Daniel D ^[1]; Keville, Robert F ^[2]

---

1. Livermore, CA
2. Valley Springs, CA

An ion trap which operates in the regime between research ion traps which can detect ions with a mass resolution of better than 1:10.sup.9 and commercial mass spectrometers requiring 10.sup.4 ions with resolutions of a few hundred. The power consumption is kept to a minimum by the use of permanent magnets and a novel electron gun design. By Fourier analyzing the ion cyclotron resonance signals induced in the trap electrodes, a complete mass spectra in a single combined structure can be detected. An attribute of the ion trap mass spectrometer is that overall system size is drastically reduced due to combining a unique electron source and mass analyzer/detector in a single device. This enables portable low power mass spectrometers for the detection of environmental pollutants or illicit substances, as well as sensors for on board diagnostics to monitor engine performance or for active feedback in any process involving exhausting waste products.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• DOE Contract Number: W-7405-ENG-48
• Assignee: Regents of University of California ()
• Patent Number(s): US 5477046
• OSTI ID: 870214
• Country of Publication: United States
• Language: English

Related Subjects

/250/
10
active
active feedback
analyzer
analyzing
attribute
board
combined
combining
commercial
commercial mass
complete
consumption
cyclotron
cyclotron resonance
design
detect
detected
detection
detector
device
diagnostics
drastically
due
electrodes
electron
electron gun
electron source
enables
engine
environmental
environmental pollutant
environmental pollutants
exhausting
feedback
fourier
gun
hundred
illicit
induced
involving
kept
magnets
mass
mass analyzer
mass resolution
mass spectrometer
mass spectrometers
mini
minimum
monitor
novel
novel electron
operates
overall
performance
permanent
permanent magnet
permanent magnets
pollutants
portable
power
power consumption
process
process involving
products
reduced
regime
requiring
resolution
resolutions
resonance
resonance signals
sensors
signals
signals induced
single
single combined
single device
size
source
spectra
spectrometer
spectrometers
spectrometers requiring
structure
substances
trap
trap mass
traps
unique
waste
waste product
waste products