Mass spectrometer and method of determining mass-to-charge...

Details Mass spectrometer and method of determining mass-to-charge... Mass spectrometer and method of determining mass-to-charge...

2005-09-27

2005-09-27

Lee, John R. (Department: 2881)

Radiant energy

Ionic separation or analysis

Ion beam pulsing means with detector synchronizing means

C250S282000, C250S291000

Reexamination Certificate

active

06949738

ABSTRACT:
The present invention provides a time of flight mass spectrometer having a spiral flight path, whose mass resolution can be appropriately changed with respect to the analysis object or other factor without any complicated alteration or addition of the mechanical construction. In a specific form of the invention, the mass spectrometer includes deflecting electrodes20-23located between semi-cylindrical electrodes11and12for making ions fly along a spiral path. The deflecting electrodes20-23generate deflecting electric fields for shifting the ions in the axial direction of the semi-cylindrical electrodes11and12. The voltage applied to the deflecting electrodes20-23is changed according to the mass resolution required. The deflecting electric fields are generated or removed with the change of the voltage, which makes the ions fly either along a spiral path or in the same loop orbit. The flight distance of the ions can be controlled as desired by regulating the voltage so that the ions fly in the loop orbit an appropriate number of times. Thus, the mass resolution can be arbitrarily controlled.

REFERENCES:
patent: 6300625 (2001-10-01), Ishihara
patent: 6867414 (2005-03-01), Buttrill, Jr.
patent: 2003/0150987 (2003-08-01), Guevremont et al.
patent: 2004/0159782 (2004-08-01), Park
patent: 11-195398 (1999-07-01), None
patent: 2000-243345 (2000-09-01), None
patent: 2003-86129 (2003-03-01), None

Affiliated with

Also associated with

Rating

Mass spectrometer and method of determining mass-to-charge... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Mass spectrometer and method of determining mass-to-charge..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mass spectrometer and method of determining mass-to-charge... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3389043