US4663567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Generation of stable linear plasmas
Assignee: Physics International Co
•
Filing: 1985-10-28
•
Granted: 1987-05-05
•
Expires: 2005-10-28
Abstract
Abstract An ionizable material is injected in the shape of concentric jet and cylindrical column of gases from a cathode-nozzle toward an anode and subjected to a very short, high voltage pulse of electrical current having sufficient magnitude to create a high magnetic field which implodes the cylindrical column of ionizable material and compresses the central jet of ionizable material to a very dense plasma that is relatively stable longitudinally that can be used as a gain medium for a long wave length X-ray laser.
Inventors
- 👤 Sik-Lam Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:02
CPC Classifications
H; H05; H05G; H05G2/00; H05G2/001; H05G2/002; H01; H01S; H01S4/00; H05H; H05H1/00; H05H1/02; H05H1/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
128 words
A method of generating a stable linear plasma comprising the steps of creating a first hollow cylindrical column of ionizable material selected from the group consisting of krypton, neon and argon, concurrently creating a second cylindrical column of ionizable material, selected from the group consisting of krypton, neon and argon, coaxial with said first hollow cylindrical column of ionizable material and having an outside diameter less than the inside diameter of said first hollow cylindrical column of ionizable material, passing an electrical current longitudinally through said first column of ionizable material sufficient to cause said first hollow cylindrical column of ionizable material to be ionized and implode upon said second cylindrical column of ionizable material heating said ionizable material in said second cylindrical column to an ionizable temperature.
Claim 2
Independent Claim
128 words
A method of generating a stable linear plasma comprising the steps of creating a first hollow cylindrical column of ionizable material selected from the group consisting of krypton, neon and argon, concurrently creating a second cylindrical column of ionizable material, selected from the group consisting of krypton, neon and argon, coaxial with said first hollow cylindrical column of ionizable material and having an outside diameter less than the inside diameter of said first hollow cylindrical column of ionizable material, passing an electrical current longitudinally through said first column of ionizable material sufficient to cause said first hollow cylindrical column of ionizable material to be ionized and implode upon said second cylindrical column of ionizable material heating said ionizable material in said second cylindrical column to an ionizable temperature.
Claim 3
Independent Claim
75 words
A method of generating a stable linear plasma comprising the steps of concurrently creating first hollow and second solid coaxial cylindrical columns of an ionizable gas ionizing said first hollow cylindrical column gas into an outer cylindrical column of plasma by heating said ionizable gas by photo-excitation, imploding said ionized first hollow cylindrical column of plasma into said second solid coaxial cylindrical column of ionizable gas to ionize said second cylindrical column of ionizable gas.
Claim 4
Independent Claim
75 words
A method of generating a stable linear plasma comprising the steps of concurrently creating first hollow and second solid coaxial cylindrical columns of an ionizable gas ionizing said first hollow cylindrical column gas into an outer cylindrical column of plasma by heating said ionizable gas by photo-excitation, imploding said ionized first hollow cylindrical column of plasma into said second solid coaxial cylindrical column of ionizable gas to ionize said second cylindrical column of ionizable gas.
Claim 5
Dependent Claim
123 words
Apparatus for creating a longitudinally stable plasma comprising an anode, a cathode-nozzle spaced apart from said anode, said cathode-nozzle comprising means for injecting an inner cylindrical column of ionizable material in said space between said anode and said cathode-nozzle, means, coaxial with said means for injecting an inner cylindrical column of ionizable material, for injecting a hollow cylindrical column of ionizable material concentric about said inner cylindrical jet of ionizable material, and means for generating a high voltage, high current pulse of electrical energy between said anode and said cathode-nozzle and through said cylindrical columns of ionizable material sufficient to ionize said material and to cause said outer hollow cylinder of ionizable gas to implode upon said inner cylindrical jet of ionizable gas.
Claim 6
Dependent Claim
123 words
Apparatus for creating a longitudinally stable plasma comprising an anode, a cathode-nozzle spaced apart from said anode, said cathode-nozzle comprising means for injecting an inner cylindrical column of ionizable material in said space between said anode and said cathode-nozzle, means, coaxial with said means for injecting an inner cylindrical column of ionizable material, for injecting a hollow cylindrical column of ionizable material concentric about said inner cylindrical jet of ionizable material, and means for generating a high voltage, high current pulse of electrical energy between said anode and said cathode-nozzle and through said cylindrical columns of ionizable material sufficient to ionize said material and to cause said outer hollow cylinder of ionizable gas to implode upon said inner cylindrical jet of ionizable gas.
Claim 7
Dependent Claim
40 words
The apparatus as claimed in claim 3 further comprising means for heating said inner and outer cylindrical columns of ionizable material prior to applying said high voltage, high current pulse of electrical energy through said cylindrical columns of ionizable material.
Claim 8
Dependent Claim
122 words
Apparatus for creating a longitudinally stable plasma comprising an anode, a cathode-nozzle spaced apart from said anode, said cathode-nozzle comprising an inner nozzle adapted to inject an inner cylindrical column of ionizable material in said space between said anode and said cathode-nozzle, and outer nozzle coaxial with said inner nozzle and adapted to inject a hollow cylindrical column of ionizable material concentric about said inner cylindrical jet of ionizable material, and means for generating a high voltage, high current pulse of electrical energy between said anode and said cathode-nozzle and through said cylindrical columns of ionizable gas sufficient to ionize said gasses and to cause said outer hollow cylinder of ionizable gas to implode upon said inner cylindrical jet of ionizable gas.
Claim 9
Dependent Claim
122 words
Apparatus for creating a longitudinally stable plasma comprising an anode, a cathode-nozzle spaced apart from said anode, said cathode-nozzle comprising an inner nozzle adapted to inject an inner cylindrical column of ionizable material in said space between said anode and said cathode-nozzle, and outer nozzle coaxial with said inner nozzle and adapted to inject a hollow cylindrical column of ionizable material concentric about said inner cylindrical jet of ionizable material, and means for generating a high voltage, high current pulse of electrical energy between said anode and said cathode-nozzle and through said cylindrical columns of ionizable gas sufficient to ionize said gasses and to cause said outer hollow cylinder of ionizable gas to implode upon said inner cylindrical jet of ionizable gas.
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) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |