US4599724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quadrupole-magnetic-pump-field free electron laser
Assignee: Boeing North American Inc
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Filing: 1984-11-13
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Granted: 1986-07-08
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Expires: 2004-11-13
Abstract
Abstract A free electron laser in which the electron beam 12 is sent through the field of a quadrupole magnet 16 which may be untapered or tapered. The beam 12 is sent through the magnet 16 spaced from the symmetry axis of the magnet's poles 22 but on the focusing plane 20 of the quadrupole magnet 16.
Inventors
- 👤 Wayne A. McMullin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:42
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/0903
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
38 words
A free electron laser including magnetic means forming an interaction region where spontaneous emission from the electron beam is passed through an oscillator resulting in a coherently amplified output and wherein: said magnetic means comprises a quadrupole magnet.
Claim 2
Dependent Claim
38 words
A free electron laser including magnetic means forming an interaction region where spontaneous emission from the electron beam is passed through an oscillator resulting in a coherently amplified output and wherein: said magnetic means comprises a quadrupole magnet.
Claim 3
Dependent Claim
25 words
A laser as in claim 1, including: means for directing the electron beam parallel to but off-axis from the symmetry axis of the quadrupole magnet.
Claim 4
Dependent Claim
48 words
A laser as in claim 1, wherein: pole pieces of said quadrupole magnet are tapered in an axial direction toward a downstream end so that the cross-sectional area between the poles at the downstream end is smaller than the cross-sectional area between the poles at an upstream end.
Claim 5
Dependent Claim
32 words
A laser as in claim 1, including: means for adjusting the field strength of the quadrupole magnet so that the frequency of coherent radiation emitted by the electron beam may be varied.
Claim 6
Dependent Claim
32 words
A laser as in claim 3, including: means for adjusting the field strength of the quadrupole magnet so that the frequency of coherent radiation emitted by the electron beam may be varied.
Claim 7
Dependent Claim
41 words
A free electron laser including magnetic means forming an interaction region through which external radiation and an electron beam pass causing stimulated emission such that resulting output radiation is coherent and amplified and wherein said magnetic means comprises a quadrupole magnet.
Claim 8
Dependent Claim
41 words
A free electron laser including magnetic means forming an interaction region through which external radiation and an electron beam pass causing stimulated emission such that resulting output radiation is coherent and amplified and wherein said magnetic means comprises a quadrupole magnet.
Claim 9
Dependent Claim
32 words
A laser as in claim 6 including means for adjusting the field strength of the quadrupole magnet so that the frequency of coherent radiation emitted by the electron beam may be varied.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-07 | 1990-01-06 | 1990-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-07 | 1994-01-06 | 1994-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-07 | 1998-01-06 | 1998-07-08 | $7700.00 | Window Closed / Lapsed |