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US4887058A
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Periodic permanent magnet structures
Assignee: Telettra SpA
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Filing: 1989-07-03
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Granted: 1989-12-12
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Expires: 2009-07-03
Abstract
Abstract Periodic permanent magnet structures comprise a plurality of paired axiallyligned sections of hollow spherical flux sources each of which produces a uniform high-field in its central cavity. Each pair of sections is mounted on opposite sides of a respective plate of permeable material. The magnetic field orientations in the central cavities are axially directed and alternate or reverse in direction from section to section. An axial bore hole drilled through the sections and plates provides a continuous channel or path through which a beam of charged particles will travel.
Inventors
- 👤 Herbert A. Leupold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:14
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/08; H01J23/087; H01J23/0873; H01F; H01F7/00; H01F7/02; H01F7/0273; H01F7/0278
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
A periodic permanent magnet structure comprising a plurality of paired sections of hollow spherical flux sources having juxtaposed open ends, each flux source producing a uniform high-field in its central cavity, each pair of sections being mounted on opposite sides of a respective plate of permeable material so that the plate closes the open ends thereof, each flux source having an axial bore hole through the magnetic pole of the flux source, said bore hole continuing through each plate of permeable material, each set of paired sections being in tangential edge contact so that the magnetic field orientations are in alignment so as to form a continuous channel through the plurality of axially aligned flux sources, and a pair of superconducting planar sheets abutting the flat faces of each flux source.
Claim 2
Dependent Claim
131 words
A periodic permanent magnet structure comprising a plurality of paired sections of hollow spherical flux sources having juxtaposed open ends, each flux source producing a uniform high-field in its central cavity, each pair of sections being mounted on opposite sides of a respective plate of permeable material so that the plate closes the open ends thereof, each flux source having an axial bore hole through the magnetic pole of the flux source, said bore hole continuing through each plate of permeable material, each set of paired sections being in tangential edge contact so that the magnetic field orientations are in alignment so as to form a continuous channel through the plurality of axially aligned flux sources, and a pair of superconducting planar sheets abutting the flat faces of each flux source.
Claim 3
Dependent Claim
30 words
A periodic permanent magnet structure as defined in claim 1 comprising eighth sphere sections, each having inner and outer radii equal to the respective radii of said hollow flux source.
Claim 4
Dependent Claim
24 words
A periodic permanent magnet structure as defined in claim 2 wherein the magnetic field orientations in each pair of sections are in opposite directions.
Claim 5
Dependent Claim
32 words
A periodic permanent magnet structure as defined in claim 3 wherein the magnetic field orientation in each axial bore hole of each section is the reverse of that in the adjacent cavity.
Claim 6
Dependent Claim
26 words
A periodic permanent magnet structure as defined in claim 4 wherein the plates of permeable material are at least peripherally coextensive with the sections mounted thereon.
References Cited (Backward Citations)
US4835137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |