US4298824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Millimeter and sub-millimeter radiation source
Assignee: Dartmouth College
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Filing: 1979-12-18
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Granted: 1981-11-03
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Expires: 1999-12-18
Abstract
Abstract A radiation source in which a beam of electrons is produced and directed along a path with dielectric material having a constant less than 4 in proximity to the path and an undulator providing oscillatory velocity modulation to the beam along the path for producing millimeter and sub-millimeter wavelength radiation.
Inventors
- 👤 John E. Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:16
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
58 words
A radiation source comprising: electron means for producing a beam of electrons and directing said beam along a linear path; dielectric material having a dielectric constant less than 4 mounted in proximity to said path; means for providing Ubitron type of interaction oscillatory velocity modulation to said beam along said path for providing millimeter and sub-millimeter wavelength radiation.
Claim 2
Dependent Claim
58 words
A radiation source comprising: electron means for producing a beam of electrons and directing said beam along a linear path; dielectric material having a dielectric constant less than 4 mounted in proximity to said path; means for providing Ubitron type of interaction oscillatory velocity modulation to said beam along said path for providing millimeter and sub-millimeter wavelength radiation.
Claim 3
Dependent Claim
15 words
A source as in claim 1, wherein said material is formed as a cylindrical liner.
Claim 4
Dependent Claim
32 words
A source as in claim 1, wherein said providing means includes a plurality of soft iron pieces separated from each other by non-permeable material along the beam path to produce transverse modulation.
Claim 5
Dependent Claim
23 words
A source as in claim 1, 2, or 3, further including a vacuum vessel enclosing said dielectric material, providing means and electron means.
Claim 6
Dependent Claim
27 words
A source as in claim 1, 2, or 3 wherein said material is chosen from the group consisting essentially of quartz, polytetrafluoroethylene, polymethyl methacrylate, polyethylene, and polystyrene.
Claim 7
Dependent Claim
36 words
A source as in claim 1, 2, or 3 further including means for focussing and guiding said beam to destabilize the guided electro-magnetic modes, and to convert the electron beam energy into high power, coherent radiation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |