US3935504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for injection of a plasma
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1971-08-16
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Granted: 1976-01-27
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Expires: 1991-08-16
Abstract
Abstract A plasma injection method, in which a magnetic field is produced which has a configuration in the form of a convergent nozzle so that there is a high magnetic field gradient between the inlet and the neck of said nozzle, the lines of the magnetic field being substantially perpendicular to the axis of the said nozzle, and in that the said plasma is produced at the inlet and along the axis of said nozzle by appropriate means, the said magnetic field gradient having the effect of injecting said plasma from the inlet to the neck of the said nozzle.
Inventors
- 👤 Pierre Guillaneux
- 👤 Claude Patou
- 👤 Gianfranco Tonon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:52
CPC Classifications
G; G21; G21B; G21B1/00; G21B1/11; G21B1/23; H; H05; H05H; H05H1/00; H05H1/24; H05H1/52; Y; Y02; Y02E; Y02E30/00; Y02E30/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
111 words
Plasma injection apparatus comprising a coaxial gun of the focus type comprising a hollow cylindrical outer electrode which surrounds a cylindrical inner electrode without contact and a window formed in said outer electrode, which forms a sealed enclosure, a solid target disposed on the axis of said gun and near the free end of the said inner electrode, means for injecting a gas into said enclosure, means for producing an electrical discharge between said two electrodes, a triggered laser producing a laser beam, an optical system for focusing the laser beam substantially on said target and means for synchronising the triggering of the light emission of said laser and said discharge.
Claim 2
Dependent Claim
111 words
Plasma injection apparatus comprising a coaxial gun of the focus type comprising a hollow cylindrical outer electrode which surrounds a cylindrical inner electrode without contact and a window formed in said outer electrode, which forms a sealed enclosure, a solid target disposed on the axis of said gun and near the free end of the said inner electrode, means for injecting a gas into said enclosure, means for producing an electrical discharge between said two electrodes, a triggered laser producing a laser beam, an optical system for focusing the laser beam substantially on said target and means for synchronising the triggering of the light emission of said laser and said discharge.
Claim 3
Dependent Claim
68 words
Apparatus according to claim 1, wherein said inner electrode is hollow, and further comprising a central aperture at the free end of said inner electrode, a cryostat in said inner electrode, an outlet for said cyrostat, said cryostat being supplied by a gas through a quick-opening valve, means for controlling said valve connected to said synchronising means, the outlet of said crystat being situated at said central aperture.
Claim 4
Dependent Claim
19 words
Apparatus according to claim 1, wherein said gas introduced into the said enclosure includes at least one hydrogen isotope.
Claim 5
Dependent Claim
13 words
Apparatus according to claim 1, wherein said laser is a neodynmium-doped glass laser.
Claim 6
Dependent Claim
13 words
Apparatus according to claim 1, wherein said laser is a CO 2 laser.
Claim 7
Dependent Claim
12 words
Apparatus according to claim 1, wherein said laser is a chemical laser.
Claim 8
Dependent Claim
63 words
A plasma injection method, the injection having the effect of bringing the plasma to a high temperature, consisting of the steps of producing a magnetic convergent nozzle by creating an electrical discharge of the focus type, and producing a plasma at the inlet and along the axis of said nozzle, said plasma being injected from the inlet to the neck of said nozzle.
Claim 9
Dependent Claim
63 words
A plasma injection method, the injection having the effect of bringing the plasma to a high temperature, consisting of the steps of producing a magnetic convergent nozzle by creating an electrical discharge of the focus type, and producing a plasma at the inlet and along the axis of said nozzle, said plasma being injected from the inlet to the neck of said nozzle.
Claim 10
Dependent Claim
26 words
A method according to claim 7, wherein said plasma is produced by impinging a laser beam on a solid target at the inlet of said nozzle.
Claim 11
Dependent Claim
33 words
A method according to claim 8, including the step of forming said solid target by injecting a burst of gas in a cryostat, the solidified gas at the cryostat outlet constituting said target.
Claim 12
Dependent Claim
20 words
A method according to claim 7, including the step of directing said laser beam along the axis of said nozzle.
Claim 13
Dependent Claim
32 words
A method according to claim 10, the step of producing said laser plasma occurring when said discharge of the focus type substantially reaches the axis of the nozzle, and continuing said discharge.
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) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |