US3922543A
Expired / Lapsed
US
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Ion cyclotron resonance spectrometer and method
Assignee: Individual
•
Filing: 1974-03-28
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Granted: 1975-11-25
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Expires: 1994-03-28
Abstract
Abstract An ion cyclotron resonance mass spectrometer having a source region and an analyzer region operable in both the standard drift mode and in a pulsed mode which includes ion trapping. Appropriate configurations of applied electrostatic fields permit trapping of ions in the source region of the spectrometer for relatively long periods after which detection is effected by drifting the ions from the source through the analyzer region where their power absorption is measured. The spectrometer may also be operated in the normal mode, thus allowing for the full range of conventional ion cyclotron resonance measurements with the additional capability of examining the variation of ion abundance with time.
Inventors
- 👤 Jesse L Beauchamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:35
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/26; H01J49/34; H01J49/36; H01J49/38; B; B01; B01D; B01D59/00; B01D59/44; B01D59/48
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
165 words
In an ion cyclotron resonance spectrometer, means forming an ion source region, means for ionizing gaseous substances within said ion source region to form a plurality of different ion species, an analyzing region, means for directing a magnetic field through said source and analyzing regions, means for applying static electric fields to said source region and analyzing region which together create a potential configuration with equi-potential lines which close themselves within the source region and which together with said magnetic field serves to constrain the different ion species to move in said source region on said equi-potential lines to remain in the source region for the same predetermined time, means for thereafter applying electric fields to said source and analyzing regions which together create a potential configuration which releases said different ion species after said predetermined time and causes them to drift from said source region through said analyzing region, and means for detecting the different ion species as they drift through the analyzing region.
Claim 2
Dependent Claim
165 words
In an ion cyclotron resonance spectrometer, means forming an ion source region, means for ionizing gaseous substances within said ion source region to form a plurality of different ion species, an analyzing region, means for directing a magnetic field through said source and analyzing regions, means for applying static electric fields to said source region and analyzing region which together create a potential configuration with equi-potential lines which close themselves within the source region and which together with said magnetic field serves to constrain the different ion species to move in said source region on said equi-potential lines to remain in the source region for the same predetermined time, means for thereafter applying electric fields to said source and analyzing regions which together create a potential configuration which releases said different ion species after said predetermined time and causes them to drift from said source region through said analyzing region, and means for detecting the different ion species as they drift through the analyzing region.
Claim 3
Dependent Claim
83 words
An ion cyclotron resonance spectrometer as in claim 1 in which said source region and analyzing region are defined by spaced side trapping plates, upper and lower source plates at one end of said trapping plates to define the source region, upper and lower analyzer plates at the other end of said trapping plates to define the analyzing region and an additional plate disposed opposite the end of said source region cooperating with the other plates to set up the equipotential constraining fields.
Claim 4
Dependent Claim
27 words
An ion cyclotron resonance spectrometer as in claim 1 in which said means for detecting ions as they drift through said analyzing region includes a marginal oscillator.
Claim 5
Dependent Claim
38 words
An ion cyclotron resonance spectrometer as in claim 2 in which positive ions are trapped in said source region by applying zero voltage to said trapping plate and source plates and a negative voltage to said analyzer plates.
Claim 6
Dependent Claim
54 words
An ion cyclotron resonance spectrometer as in claim 4 wherein the ions trapped in said source region are released and allowed to drift through said analyzer region by applying a positive voltage to the upper source and analyzer plates and a negative voltage to said lower source and analyzer plate and said trapping plate.
Claim 7
Dependent Claim
23 words
An ion cyclotron resonance spectrometer as in claim 1 wherein said ionizing means comprises a pulse of electrons of predetermined energy and duration.
Claim 8
Dependent Claim
36 words
An ion cyclotron resonance spectrometer as in claim 6 in which the analyzing means comprises a marginal oscillator and a boxcar integrator which is on during the drift time of the ions through the analyzer region.
Claim 9
Independent Claim
86 words
The method of measuring ion intensity of constituents in a reaction comprises forming different ion species by impacting a pulse of electrons on a gas to be analyzed in an ion source region, constraining said different ion species so that they move only in said source region for the same predetermined period of time and then allowing the ions to drift from the source region through an analyzing region of an ion cyclotron resonance spectrometer to measure the signal intensity of each of said ion species.
Claim 10
Independent Claim
86 words
The method of measuring ion intensity of constituents in a reaction comprises forming different ion species by impacting a pulse of electrons on a gas to be analyzed in an ion source region, constraining said different ion species so that they move only in said source region for the same predetermined period of time and then allowing the ions to drift from the source region through an analyzing region of an ion cyclotron resonance spectrometer to measure the signal intensity of each of said ion species.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |