Electron source for a mini ion trap mass spectrometer

Details Electron source for a mini ion trap mass spectrometer Electron source for a mini ion trap mass spectrometer

1995-04-24

1995-12-19

Berman, Jack I.

Radiant energy

Ionic separation or analysis

With sample supply means

250423F, 250423R, 250427, H01J 4908

Patent

active

054770467

ABSTRACT:
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.

REFERENCES:
patent: 4825082 (1989-04-01), Okunuki et al.
patent: 5386115 (1995-01-01), Freidhoff et al.
Mead, Journal of Applied Physics, vol. 32, No. 4, Apr. 1961, pp. 646-652.
Spratt et al., Physical Review Letters, vol. 6, No. 7, Apr. 1, 1961, pp. 341-342.
Kanter et al., Journal of Applied Physics, vol. 33, No. 12, Dec. 1962, pp. 3580-3588.

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