US3760186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for determining the energy of charged particles
Assignee: Individual
•
Filing: 1972-01-24
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Granted: 1973-09-18
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Expires: 1992-01-24
Abstract
Abstract A device for determining the energies of charged particles, as Auger electrons, comprises at least one durved or domeshaped electrode biased to converge the paths of particles which are emitted by a particle source into a solid angle spanned by said electrode. The electrode is convex toward the particle source and cooperates with a similar, fairly closely spaced second electrode, and with a bias source connected to said electrodes to produce a particle accelerating field between them, to focus particles of a predetermined energy into a particle detecting device.
Inventors
- 👤 P Staib
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:22
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/44; H01J49/46; H01J49/48
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
258 words
A device for determining the energy distribution of charged particles, especially electrons, emitted from a source of particles in a given solid angle, comprising: an arrangement of electrodes which includes potentials least a first perforated electrode (10,10'') spanning said solid angle, which electrode is convex towards said source of particles (18), and a second perforated electrode (12,12''), likewise convex towards said source, radially spaced from said first electrode on the side of said first electrode farthest from said source; electric potential bias means for applying otentials to said first and second electrodes such as to generate an electric field that causes said particles diverging from said source to converge after passing through said first and second electrodes; a particle detecting device located on the median of the arrangement of said electrodes and said source at a greater distance from said source than said electrodes, said particle detecting device having an entrance diaphragm (20) with an aperture of such restricted size and shape as to exclude particles converging on said median at more than a predetermined small distance behind said diaphragm; a baffle (16,28) centered on said median and located between said source of particles and said diaphragm, said baffle being of a size and shape at least approximately including the direct projection from said source of said diaphragm aperture, so that particles with little or no divergence from said median are blocked from said particle detecting device; and scanning means for enabling said particle detecting device to scan over a range of particle emission energies of said source.
Claim 2
Independent Claim
258 words
A device for determining the energy distribution of charged particles, especially electrons, emitted from a source of particles in a given solid angle, comprising: an arrangement of electrodes which includes potentials least a first perforated electrode (10,10'') spanning said solid angle, which electrode is convex towards said source of particles (18), and a second perforated electrode (12,12''), likewise convex towards said source, radially spaced from said first electrode on the side of said first electrode farthest from said source; electric potential bias means for applying otentials to said first and second electrodes such as to generate an electric field that causes said particles diverging from said source to converge after passing through said first and second electrodes; a particle detecting device located on the median of the arrangement of said electrodes and said source at a greater distance from said source than said electrodes, said particle detecting device having an entrance diaphragm (20) with an aperture of such restricted size and shape as to exclude particles converging on said median at more than a predetermined small distance behind said diaphragm; a baffle (16,28) centered on said median and located between said source of particles and said diaphragm, said baffle being of a size and shape at least approximately including the direct projection from said source of said diaphragm aperture, so that particles with little or no divergence from said median are blocked from said particle detecting device; and scanning means for enabling said particle detecting device to scan over a range of particle emission energies of said source.
Claim 3
Dependent Claim
19 words
A device as defined in claim 1 in which the curvature of said first and second electrodes is concentric.
Claim 4
Dependent Claim
29 words
A device as defined in claim 1 in which said scanning means includes means for moving said particle detecting device towards or away from said source along said median.
Claim 5
Dependent Claim
54 words
A device as defined in claim 1 in which said median is an axis passing through said source and said first and second perforated electrodes are rotation-symmetrical with respect to said axis, and in which, further, said diaphragm aperture of said particle detecting device is circular and located so that said axis passes therethrough.
Claim 6
Dependent Claim
23 words
A device as defined in claim 4 in which sAid baffle is a disc (28) disposed between said second electrode and said diaphragm.
Claim 7
Dependent Claim
35 words
A device as defined in claim 1 in which the proportion of the spacing of said first and second perforated electrodes to the average radius of curvature of said electrodes is between 0.01 and 0.5.
Claim 8
Dependent Claim
95 words
A device as defined in claim 1 in which said scanning means includes a retarding-field analyzer disposed between said source of particles and said first perforated electrode, said retarding-field analyzer comprising at least a third and a fourth perforated electrodes (22,24) concave towards said source and connected to an electric bias source so as to produce a particle-retarding electric field between said third and fourth electrodes, and in which further the space between said retarding-field analyzer and said first perforated electrode (10, 10'') is bounded by a fifth electrode (26) of cylindrical or truncated-cone shape.
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |