US3681599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sector-type charged particle energy analyzer
Assignee: Hitachi Ltd
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Filing: 1969-10-22
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Granted: 1972-08-01
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Expires: 1989-10-22
Abstract
Abstract A sector-type charged particle energy analyzer has a pair of mutually confronting sector-type magnetic poles and an incident opening through which charged particles to be analyzed are projected to the inner part of the analyzer from its outer part formed in the gap between the magnetic poles. The outer energizing coil is wound, within a gap between the pair of magnet poles, flatly expanded in a direction perpendicular to the symmetrical plane of the magnetic poles so as to render uniform the distribution of the magnetic field in the gap between the magnet poles, and, at the same time, this outer energizing coil is divided into upper and lower parts at the position of the incident opening to render it possible to increase as much as feasible the incident angle of the charged particles projected into the inner part of the anaylzer thereby increasing the analytical performance of the charged particle analyzer.
Inventors
- 👤 Kenji Takumi
- 👤 Hisashi Yamamoto
- 👤 Hidetsugu Ikegani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:32
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/20; H01J49/26; H01J49/28; H01J49/30; H01J49/44; H01J49/46
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
181 words
A sector-type charged particle energy analyzer comprising a pair of mutually confronting sector-shaped magnetic poles disposed symmetrically with respect to a plane containing an arcuate standard orbit of charged particles, each of said poles having an outer peripheral end surface consisting essentially of an arcuate portion and a flat portion; a return yoke bridging across the outer peripheral end surfaces of said pair of magnetic poles; an outer energizing coil wound within a gap provided between said pair of magnetic poles and along the inner peripheral surface of said return yoke; an incident opening provided in said return yoke at a portion where said standard orbit crosses said return yoke; said outer energizing coil being flatly expanded in a direction perpendicular to the symmetrical plane of said pair of magnetic poles, but being divided into upper and lower parts only at the portion where said incidEnt opening is provided; a source of charged particles to be analyzed provided outside of said incident opening; a detector means for detecting the charged particles passing through said gap between said pair of magnetic poles.
Claim 2
Dependent Claim
181 words
A sector-type charged particle energy analyzer comprising a pair of mutually confronting sector-shaped magnetic poles disposed symmetrically with respect to a plane containing an arcuate standard orbit of charged particles, each of said poles having an outer peripheral end surface consisting essentially of an arcuate portion and a flat portion; a return yoke bridging across the outer peripheral end surfaces of said pair of magnetic poles; an outer energizing coil wound within a gap provided between said pair of magnetic poles and along the inner peripheral surface of said return yoke; an incident opening provided in said return yoke at a portion where said standard orbit crosses said return yoke; said outer energizing coil being flatly expanded in a direction perpendicular to the symmetrical plane of said pair of magnetic poles, but being divided into upper and lower parts only at the portion where said incidEnt opening is provided; a source of charged particles to be analyzed provided outside of said incident opening; a detector means for detecting the charged particles passing through said gap between said pair of magnetic poles.
Claim 3
Dependent Claim
47 words
A sector-type charged particle energy analyzer, as claimed in claim 1, wherein the upper and lower parts of said outer energizing coil are wound along the inclination of the respective pole surfaces of said pair of magnetic poles and protruding slightly inwardly from said respective pole surfaces.
Claim 4
Dependent Claim
202 words
A sector-type charged particle energy analyzer comprising a pair of mutually confronting sector-shaped magnetic poles disposed symmetrically with respect to a plane containing an arcuate standard orbit of charged particles, each of said poles having an outer peripheral end surface consisting essentially of an arcuate portion and a flat portion; a return yoke bridging across the outer peripheral end surfaces of said pair of magnetic poles; an iron core bridging across the center portions of said pair of magnetic poles; an outer energizing coil wound within a gap provided between said pair of magnetic poles and along the inner peripheral surface of said return yoke; an inner energizing coil wound around said iron core; an incident opening provided in said return yoke at a portion where said standard orbit crosses said return yoke; said outer energizing coil being flatly expanded in a direction perpendicular to the symmetrical plane of said pair of magnetic poles, but being divided into upper and lower parts only at the portion where said incident opening is provided; a source of charged particles to be analyzed provided outside of said incident opening; and detector means for charged particles passing through said gap between said pair of magnetic poles.
Claim 5
Dependent Claim
202 words
A sector-type charged particle energy analyzer comprising a pair of mutually confronting sector-shaped magnetic poles disposed symmetrically with respect to a plane containing an arcuate standard orbit of charged particles, each of said poles having an outer peripheral end surface consisting essentially of an arcuate portion and a flat portion; a return yoke bridging across the outer peripheral end surfaces of said pair of magnetic poles; an iron core bridging across the center portions of said pair of magnetic poles; an outer energizing coil wound within a gap provided between said pair of magnetic poles and along the inner peripheral surface of said return yoke; an inner energizing coil wound around said iron core; an incident opening provided in said return yoke at a portion where said standard orbit crosses said return yoke; said outer energizing coil being flatly expanded in a direction perpendicular to the symmetrical plane of said pair of magnetic poles, but being divided into upper and lower parts only at the portion where said incident opening is provided; a source of charged particles to be analyzed provided outside of said incident opening; and detector means for charged particles passing through said gap between said pair of magnetic poles.
Claim 6
Dependent Claim
47 words
A sector-type charged particle energy analyzer, as claimed in claim 3, wherein the upper and lower parts of said outer energizing coil are wound along the inclination of the respective pole surfaces of said pair of magnetic poles and protruding slightly inwardly from said respective pole surfaces.
Claim 7
Dependent Claim
63 words
A sector-type charged particle energy analyzer, as claimed in claim 4, wherein both outer and inner energizing coils are respectively divided into a plurality of small coils which are mutually connected in series and disposed in a row in a direction perpendicular to the symmetrical plane of said pair of magnetic poles, and shim plates are provided between each pair of adjacent coils.
Claim 8
Dependent Claim
64 words
A sector-type charged particle energy analyzer, as claimed in claim 3, wherein both outer and inner energizing coils are respectively divided into a plurality of small coils which are mutually connected in series and disposed in a row in a direction perpendicular to the symmetrical plane of said pair of magnetic poles, and shim plates are provided between each pair of adjacent small coils.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |