Dithered multi-pulsing time-of-flight mass spectrometer
US8080782B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2009 |
| Grant date | Dec 20, 2011 |
| Priority date | — |
| Expiry date | Jun 15, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/0027
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A detection signal generated in response to incident ions accelerated at temporally-irregular intervals having an average repetition rate greater than a reference repetition rate represents detection events each having an event time and an intensity. For each detection event, respective allowed TOFs between the event time and the transient times are calculated. Using respective initial probabilities, initial apportionments of the intensity of each detection event among the allowed TOFs linked thereto are determined. For each allowed TOF, the intensity apportionments thereto are accumulated to generate an intensity accumulation linked thereto. For each detection event, respective revised probabilities are iteratively determined using the intensity accumulations linked to the allowed TOFs linked thereto, and the respective intensity is iteratively reapportioned among the allowed TOFs linked thereto using the revised probabilities to transform the detection signal to a time-of-flight spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.