Orthogonal acceleration time-of-flight mass spectrometer

Details Orthogonal acceleration time-of-flight mass spectrometer Orthogonal acceleration time-of-flight mass spectrometer

2005-02-15

2005-02-15

Wells, Nikita (Department: 2881)

Radiant energy

Ionic separation or analysis

Ion beam pulsing means with detector synchronizing means

C250S286000, C250S288000, C250S283000, C250S281000, C250S397000

Reexamination Certificate

active

06855924

ABSTRACT:
An orthogonal acceleration time-of-flight (oa-TOF) mass spectrometer is offered in which the repeller plate forming the ion reservoir is prevented from being electrically charged. This in turn prevents the mass spectral resolution and sensitivity from deteriorating. The mass spectrometer has an (a) external ion source for producing ions, (b) a space in which the ions are made to stay, (c) the ion reservoir consisting of the repeller plate and grids disposed on the opposite sides of the space to accelerate the ions in a pulsed manner out of the space, (d) a time-of-flight mass spectrometric portion for mass separating the ions taken out of the ion reservoir via its internal grids, (e) an ion detector for detecting the mass-separated ions, and (f) a heater for heating the repeller plate.

REFERENCES:
patent: 6600155 (2003-07-01), Andrien et al.
patent: 6674068 (2004-01-01), Kammei
patent: 6683301 (2004-01-01), Whitehouse et al.
patent: 2002-117802 (2002-04-01), None

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