 |
|
|
|
|
|
 Title: |
US5780971:
Method and apparatus for generating radiation utilizing DC to AC conversion with a conductive front
[ Derwent Title ]
|
| Country: |
US United States of America
|
| |
| Inventor: |
Dawson, John M.; Pacific Palisades, CA
Mori, Warren B.; Hermosa Beach, CA
Lai, Chih-Hsiang; So. Pasadena, CA
Katsouleas, Thomas C.; Malibu, CA
|
| Assignee: |
Univ. of So. Calif., Los Angeles, CA
The Regents of the Univ. Univ. of Calif., Oakland, CA
other patents from UNIVERSITY OF SOUTHERN CALIFORNIA (599930) (approx. 328)
News, Profiles, Stocks and More about this company
|
| Published / Filed: |
1998-07-14
/ 1994-06-06
|
| Application Number: |
US1994000254410
|
| IPC Code: |
Advanced:
H01J 61/00;
H01J 61/14;
H01J 61/54;
Core:
H01J 61/12;
more...
IPC-7:
H03B 7/10;
H03B 17/00;
|
| ECLA Code: |
H01J61/00; H01J61/14; H01J61/54;
|
| U.S. Class: |
Current:
315/039;
327/301;
331/094.1;
Original:
315/039;
331/094.1;
327/301;
|
| Field of Search: |
315/039
330/004
331/94.1
327/301
359/240
|
| Government Interest: |
STATEMENT OF GOVERNMENT INTEREST
The invention described herein was made in course of or under a contract or subcontract with the United States Department of Energy.
|
| Priority Number: |
| 1994-06-06 |
US1994000254410 |
|
| Abstract: |
Method and apparatus for generating radiation of high power, variable duration and broad tunability over several orders of magnitude from a laser-ionized gas-filled capacitor array. The method and apparatus convert a DC electric field pattern into a coherent electromagnetic wave train when a relativistic ionization front passes between the capacitor plates. The frequency and duration of the radiation is controlled by the gas pressure and capacitor spacing.
|
| Attorney, Agent or Firm: |
Fulwider Patton Lee & Utecht, LLP ;
|
| Primary / Asst. Examiners: |
Lee, Benny T.;
|
| Maintenance Status: |
CC Certificate of Correction issued
|
| INPADOC Legal Status: |
Show legal status actions
|
| Family: |
None
|
First Claim:
Show all 34 claims |
What is claimed is:
1. Method for generating radiation, comprising the steps of:
- producing a static DC electric field configuration; and
- propagating a conductive front of plasma through said electric field to cause selective discharge of current through said field, said selective discharge of current generating electromagnetic radiation behind said front which is emitted from said field.
|
| Background / Summary: |
Show background / summary
|
| Drawing Descriptions: |
Show drawing descriptions
|
| Description: |
Show description
|
| Forward References: |
Show 6 U.S. patent(s) that reference this one
|
|
|
|
|
|
|
| Foreign References: |
None
|
| Other Abstract Info: |
DERABS G1998-413268
DERABS G1998-413268
|
| Other References: |
A. K. Ganguly et al.; "Linear theory of a field-emitter-array distributed amplifier", J. Appl. Phys. 67 (11), pp. 7098-7110, Jun. 1990.
(13 pages)
T. Katsouleas et al.; "A DC To Optical Frequency Converter Based On Plasma Ionization", Abstract, Distributed on Jun. 6, 1994.
D. You et al.; "Generation of high-power sub-single-cycle 500-fs electromagnetic pulses", Optics Letters, vol. 18, No. 14; pp. 290-292 Feb. 15, 1993.
(3 pages)
Cited by 2 patents
[ISI abstract]
Henry L. Bertoni et al.; Ultra-Wideband, Short-Pulse Electromagnetics, ed. by H. Bertoni, et al., (Weber Research Institute, Plenum Press .circle-solid. New York, 1993).
M. B. Ketchen et al.; "Generation of subpicosesond electrical pulses on coplanar transmission lines", Appl.Phys. Lett., 48 (12), 24 Mar. 1986.
V. I. Semenova; "Reflection of Electromagnetic Waves From An Ionization Front", Radiophysics and Quantum Electronics, vol. 10, No. 8; pp. 599-604, 1967.
Martin Lampe et al.; "Interaction of electromagnetic waves with a moving ionization front", Phys. Fluids 21 (1), pp. 42-54, Jan. 1978.
(13 pages)
Cited by 2 patents
W. B. Mori; "Generation of turntable radiation using an underdense ionization front", Physical Review A, vol. 4, No. 8; pp. 5118-5121, 15 Oct. 1991.
(4 pages)
[ISI abstract]
R. L . Savage, Jr., et al.; "Frequency Upshifting and Pulse Compression via Underdense Relativistic Ionization Fronts", IEEE Transactions on Plasma Science, vol. 21, No. 1, pp. 5-19, Feb. 1993.
(15 pages)
Cited by 2 patents
[ISI abstract]
R. L. Savage, Jr., et al.; "Frequency Upconversion of Electromagnetic Radiation upon Transmission into an ionization Front", Physical Review Letters, vol. 68, No. 7, pp. 946-949, 17 Feb. 1992.
(4 pages)
Cited by 3 patents
[ISI abstract]
Eli Yablonovitch; "Spectral Broadening in the Light Transmitted through a Rapidly Growing Plasma", Physical Review Letters, vol. 31, No. 14, pp. 877-879, 1 Oct. 1973.
(3 pages)
Eli Yablonovitch; "Self-Phase Modulation of Light in a Laser-Breakdown Plasma", Physical Review Letters, vol. 32, No. 20, pp. 1101-1104, May 20, 1974.
(4 pages)
Wm. M. Wood et al.; "Measurement of Femtosecond Ionization Dynamics of Atmospheric Density Gases by Spectral Blueshifting", Physical Review Letters, vol. 67, No. 25, pp. 3523-3526, 16 Dec. 1991.
(4 pages)
[ISI abstract]
S. C. Wilks, et al.; "Photon Accelerator", Physical Review Letters, vol. 62, No. 22, pp. 2600-2603, 29 May 1989.
(4 pages)
D. K. Kalluri; "Frequency Shifting Using Magnetoplasma Medium: Flash Ionization", IEEE Transactions on Plasma Science, vol. 21, No. 1, pp. 77-81, Feb. 1993.
(5 pages)
[ISI abstract]
C. H. Lai et al;"Frequency Upshifting by an Ionization Front in a Magnetized Plasma", IEEE Transactions on Plasma Science, vol. 21, No. 1, pp. 45-52, Feb. 1993.
(8 pages)
[ISI abstract]
E. Esarey et al; "Frequency up-shifting of laser pulses by copropagating ionization fronts", Physical Review A, vol. 44, No. 6, pp. 3908-3911, 15 Sep. 1991.
(4 pages)
[ISI abstract]
V. B. Gildenburg et al; "Adiabatic Frequency Up-Conversion of a Powerful Electromagnetic Pulse Producing Gas Ionization", IEEE Transactions on Plasma Science, vol. 21, No. 1, pp. 34-44, Feb. 1993.
(11 pages)
[ISI abstract]
O. G. Zagorodnov et al; "Reflection of Electromagnetic Waves From A Plasma Moving in Slow-Wave Guides", Soviet Physics JetP, vol. 11, No. 1, pp. 4-5, Jul. 1960.
S. C. Wilkes et al.; "Frequency Up-Conversion of Electromagnetic Radiation with Use of an Overdense Plasma", Physical Review Letters, vol. 61, No. 3, pp. 337-340 18 Jul. 1988.
T. Katsouleas, et al.; Abstract entitled; "A DC to AC Light Converter Based on a laser Ionized Capacitator Array", Program of the 1993 Annual Meeting of the Division of Plasma Physics, Bulletin of the American Physical Society, vol. 38, No. 1m p. 1964, Nov. 1993.
D. Auston; "Ultrafast Optoelectronics", Ultrashort Laser Pulses, Ch. 5, W. Kaiser ed. (Springer-Verlog, N.Y. 1993).
|
|
 Nominate this for the Gallery...
|
|
