Radiant energy – Ionic separation or analysis – Ion beam pulsing means with detector synchronizing means
Reexamination Certificate
2007-06-19
2007-06-19
Vanore, David (Department: 2881)
Radiant energy
Ionic separation or analysis
Ion beam pulsing means with detector synchronizing means
C250S281000, C250S291000
Reexamination Certificate
active
11122063
ABSTRACT:
In the mass spectrometer of the present invention, first the length of flight time of a known ion is measured at every turn of the loop orbit. Ideally, the length of flight time at every turn is equal to one calculated based on the speed of the ion and the path length of the loop orbit, but an actual length of flight time deviates from it in a reproducible fashion. Thus, in the present invention, the deviation information is stored in the correction memory at every turn. In measuring an unknown ion, the unknown ion is made to fly the loop orbit a predetermined number of times. Then the flight time of the unknown ion that has flown the loop orbit a predetermined number of turns is measured, and the deviations of the flight time at the turns are corrected using the correction data stored in the correction memory. The mass to charge ratio of the unknown ion is calculated based on the corrected flight time. Thus the deviation of the actual flight time from the theoretical or ideal one is canceled, and the calculated mass to charge ratio becomes more precise.
REFERENCES:
patent: 6300625 (2001-10-01), Ishihara
patent: 6624410 (2003-09-01), Voss
patent: 6828553 (2004-12-01), Weiss
patent: 6906321 (2005-06-01), Yamaguchi
patent: 6949736 (2005-09-01), Ishihara
patent: 6949738 (2005-09-01), Yamaguchi et al.
patent: 2005/0045817 (2005-03-01), Yamaguchi et al.
patent: 11-195398 (1999-07-01), None
Shimadzu Corporation
Westerman, Hattori, Daniels & Adrian , LLP.
LandOfFree
Mass spectrometer 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, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mass spectrometer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3852927