US3663858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio-frequency plasma generator
Assignee: Individual
•
Filing: 1970-11-06
•
Granted: 1972-05-16
•
Expires: 1990-11-06
Abstract
Abstract A plasma generator which utilizes radio frequency power and is of the kind having a slotted transmission line consisting of a hollow tubular body electrically matched to an RF generator, in which the hollow body makes up a delay line in which the RF energy is caused to propagate with a time delay in the direction of the axis of said hollow body the radiofrequency power, by enabling heating of the plasma independent of the intensity of a magnetic field used for confining the plasma, provides a highly dense plasma.
Inventors
- 👤 Giuseppe Lisitano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:06
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/46
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
122 words
A plasma generator assembly of the type utilizing radiofrequency power for its heating means and wherein a static coaxial magnetic field is used to confine plasma, comprising: an outer container for plasma; a radiofrequency generator means for supplying radiofrequency power to the plasma; a transmission member connected to said generator means and disposed in the outer container for conveying radiofrequency energy to the plasma, the transmission member including a slotted substantially tubular hollow conductive body; and means to produce a static magnetic field to confine the plasma therein, the assembly characterized in that the arrangement of the slotted hollow body of the transmission member enables polarization of a fringing radiofrequency field to be directed relative to the confining static axial magnetic field.
Claim 2
Dependent Claim
122 words
A plasma generator assembly of the type utilizing radiofrequency power for its heating means and wherein a static coaxial magnetic field is used to confine plasma, comprising: an outer container for plasma; a radiofrequency generator means for supplying radiofrequency power to the plasma; a transmission member connected to said generator means and disposed in the outer container for conveying radiofrequency energy to the plasma, the transmission member including a slotted substantially tubular hollow conductive body; and means to produce a static magnetic field to confine the plasma therein, the assembly characterized in that the arrangement of the slotted hollow body of the transmission member enables polarization of a fringing radiofrequency field to be directed relative to the confining static axial magnetic field.
Claim 3
Dependent Claim
38 words
A plasma generator assembly as claimed in claim 1 in which said tubular hollow conductive body is helically slotted, the assembly including coaxial connector matching means to match the radiofrequency generator means with the helically slotted conductive body.
Claim 4
Dependent Claim
38 words
A plasma generator assembly as claimed in claim 1 in which said tubular hollow conductive body is helically slotted, the assembly including coaxial connector matching means to match the radiofrequency generator means with the helically slotted conductive body.
Claim 5
Dependent Claim
38 words
A plasma generator assembly as claimed in claim 1 in which said tubular hollow conductive body is helically slotted, the assembly including waveguide input connector means to match the radiofrequency generator means with the helically slotted conductive body.
Claim 6
Dependent Claim
38 words
A plasma generator assembly as claimed in claim 1 in which said tubular hollow conductive body is helically slotted, the assembly including waveguide input connector means to match the radiofrequency generator means with the helically slotted conductive body.
Claim 7
Dependent Claim
25 words
An assembly as claimed in Claim 1 in which said outer container is substantially tubular and is coaxial with said slotted substantially tubular hollow body.
Claim 8
Dependent Claim
25 words
An assembly as claimed in claim 9 in which at least the slots of the slotted tubular hollow body are filled with an insulating material.
References Cited (Backward Citations)
US2842712A
Cited
US3171053A
Cited
US3111604A
Cited
US3317784A
Cited
US3378723A
Cited
US3363138A
Cited
US3388287A
Cited
DE1261608B
Cited
US3432722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |