US3622833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charged particle accelerator
Assignee: Hitachi Ltd
•
Filing: 1968-05-14
•
Granted: 1971-11-23
•
Expires: 1988-05-14
Abstract
Abstract A device, in which light waves are directed to the surface of a periodic structure constituted of a material having high reflectivity of the light wave used, whereby a field having a periodic strength of an electric field vector of the light wave is generated in the vicinity of the surface of said periodic structure, and the energy of the light wave is supplied to the charged particles while said charged particles pass through said field, thereby accelerating the charged particles.
Inventors
- 👤 Yasutsugu Takeda
- 👤 Isao Matsui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:57
CPC Classifications
H; H05; H05H; H05H9/00; H01; H01S; H01S3/00; H01S3/0007
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
106 words
A device for transferring energy from light waves to charged particles, comprising with a periodic surface which has a high reflectivity for at least a given wavelength, first means for directing charged particles to an area located within a distance of 10 times said given wavelength from said periodic surface and said second means for generating and directing coherent light at said given wavelength toward said periodic surface and through said area to which said charged particles are directed, whereby a variation in the electric field vector of a periodic light wave is produced in the vicinity of said periodic surface thereby accelerating the charged particles.
Claim 2
Independent Claim
106 words
A device for transferring energy from light waves to charged particles, comprising with a periodic surface which has a high reflectivity for at least a given wavelength, first means for directing charged particles to an area located within a distance of 10 times said given wavelength from said periodic surface and said second means for generating and directing coherent light at said given wavelength toward said periodic surface and through said area to which said charged particles are directed, whereby a variation in the electric field vector of a periodic light wave is produced in the vicinity of said periodic surface thereby accelerating the charged particles.
Claim 3
Dependent Claim
27 words
A device as defined in claim 1 wherein said second means is provided in the form of laser device forming with said periodic surface an optical resonator.
Claim 4
Dependent Claim
39 words
A device as defined in claim 1 further including third means positioned between Said second means and said periodic surface for concentrating the light generated by said second means within the area to which said charged particles are directed.
Claim 5
Dependent Claim
29 words
A device as defined in claim 1 wherein said structure is of a cylindrical form and said second means is cylindrical in form and positioned concentrically about said structure.
Claim 6
Dependent Claim
54 words
A device as defined in claim 2 wherein the optical axis of said laser device is directed at an angle to said periodic surface, and further including a reflection mirror positioned with respect to said periodic surface transverse to path of reflected light generated by said second means and reflected by said periodic surface.
Claim 7
Dependent Claim
32 words
A device as defined in claim 2 wherein said second means is provided in the form of at least two laser devices forming with said periodic surface a pair of optical resonators.
Claim 8
Dependent Claim
33 words
A device as defined in claim 1 wherein said structure is provided in the form of a metal plate having a plurality of parallel grooves in the surface thereof facing said second means.
Claim 9
Dependent Claim
39 words
A device as defined in claim 7 wherein said charged particles are directed along a path intercepting the path of said coherent light, the parallel grooves in said structure being disposed transverse to the path of said charged particles.
Claim 10
Dependent Claim
25 words
A device as defined in claim 8 wherein the pitch of the grooves in said structure is proportional to the wavelength of said coherent light.
Claim 11
Dependent Claim
25 words
A device as defined in claim 7 wherein said grooves in said metal plate form a series of parallel rectangular projections on the face thereof.
Claim 12
Dependent Claim
25 words
A device as defined in claim 7 wherein said grooves in said metal plate form a series of parallel triangular projections on the face thereof.
Claim 13
Dependent Claim
25 words
A device as defined in claim 7 wherein said grooves in said metal plate form a series of parallel sinusoidal projections on the face thereof.
Claim 14
Dependent Claim
44 words
A device as defined in claim 2 wherein said laser device includes a reflection mirror and laser material disposed between said reflection mirror and said periodic surface to form an optical resonator, said reflection mirror being provided in the form of a rotary prism.
Claim 15
Dependent Claim
46 words
A device as defined in claim 1 wherein said structure is provided in the form of a metal cylinder having a plurality of parallel axial grooves in one surface thereof, said second means being concentric with said metal cylinder and positioned opposite said one surface thereof.
Claim 16
Dependent Claim
65 words
A device as defined in claim 14 wherein said grooves are disposed in the outer surface of said metal cylinder and said second means is provided in the form of a laser device including a tubular member of laser material concentric with and disposed about said metal cylinder and a tubular mirror concentric with and disposed about said laser material to form an optical resonator.
References Cited (Backward Citations)
US3267383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |