US3567926A
Expired / Lapsed
US
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Electron spectroscopy system with dispersion compensation
Assignee: SURFACE SCIENCE LABORATORIES Inc
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Filing: 1968-10-04
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Granted: 1971-03-02
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Expires: 1988-10-04
Abstract
Abstract A source of X-radiation and a target under study are mounted on the Rowland circle of a monochromator so that a characteristic line in the X-ray spectrum of the source is focused by the monochromator on the target. An electron spectrometer is employed to analyze the photoelectrons emerging from the irradiated target and to focus them on a detector. The geometry of the system is arranged to make the dispersion of the monochromator equal in magnitude to and opposite in sign from the dispersion of the electron spectrometer so that these dispersions cancel out and the width of the X-ray line used to irradiate the target does not contribute to the width of the electron line detected by the detector.
Inventors
- 👤 Kai M B Siegbahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:54
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/44; H01J49/46; H01J49/48; H01J49/484; G; G01; G01N; G01N23/00; G01N23/22; G01N23/227
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
27 words
An electron spectroscopy system as in claim 1 wherein: said source is mounted substantially on the Rowland circle of the monochromator; and said electromagnetic radiation is X-radiation.
Claim 2
Dependent Claim
114 words
An electron spectroscopy system as in claim 2 wherein: said monochromator comprises a crystal monochromator having a crystal dispersion D, said first dispersion being the crystal dispersion of this crystal monochromator; said dispersing element is a crystal having a curved surface and atomic planes with a radius of curvature substantially equal to the diameter of the Rowland circle; and said target is tilted at an angle Alpha with respect to the beam direction of the incident characteristic X-ray line to make the crystal dispersion D of the crystal monochromator substantially equal in magnitude to and opposite in sign from the second dispersion of the electron dispersing device so that these dispersions substantially cancel out.
Claim 3
Dependent Claim
73 words
An electron spectroscopy system as in claim 3 wherein: said electron dispersing device is a semicircular magnetic electron spectrometer, said second dispersion being the dispersion of this semicircular magnetic electron spectrometer; and said crystal monochromator and semicircular magnetic electron spectrometer are arranged so that tangent Alpha equals the produce of the photoelectron energy E and the crystal dispersion D divided by the radius Rho of the central photoelectron trajectory in the electron spectrometer.
Claim 4
Dependent Claim
73 words
An electron spectroscopy system as in claim 3 wherein: said electron dispersing device is a semicircular electrostatic electron spectrometer, said second dispersion being the dispersion of this semicircular electrostatic electron spectrometer; and said crystal monochromator and semicircular electrostatic electron spectrometer are arranged so that tangent Alpha equals the produce of the photoelectron energy E and the crystal dispersion D divided by twice the radius of the central photoelectron trajectory in the electron spectrometer.
Claim 5
Dependent Claim
77 words
An electron spectroscopy system as in claim 3 wherein: said electron dispersing device is a double focusing magnetic electron spectrometer, said second dispersion being the dispersion of this double focusing magnetic electron spectrometer; and said crystal monochromator and double focusing magnetic electron spectrometer are arranged so that tangent Alpha equals the product of the photoelectron energy E and the crystal dispersion D divided by twice the radius Rho of the central photoelectron trajectory in the electron spectrometer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |