US3668066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic stabilizer for plasma instabilities to improve plasma confinement and to increase plasma density
Assignee: United States Atomic Energy Commission
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Filing: 1970-02-18
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Granted: 1972-06-06
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Expires: 1990-02-18
Abstract
Abstract Method and apparatus for dynamic stabilization of plasma instabilities for improving plasma confinement and for increasing plasma density independent of the phase of the instabilities. The method comprises confining the plasma column between ionizing plates which supply energetic particles to the plasma in a direction parallel to the axis of the plasma column and interacting the plasma in a predetermined direction with externally supplied radio-frequency fields having a selectively variable power level amplitude and a sufficiently high frequency range.
Inventors
- 👤 Hans W Hendel
- 👤 Chu Tsukai
- 👤 Thomas C Simonen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:46
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/02; H05H1/16; H05H1/18; Y; Y02; Y02E; Y02E30/00; Y02E30/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
36 words
The invention of claim 1 having first means for determining the density of said plasma in said column for selectively adjusting the frequency and amplitude of said waves in accordance with the density of said plasma.
Claim 2
Independent Claim
148 words
The method of stabilizing a magnetically confined plasma column of high temperature ions and electrons by stabilizing low frequency instabilities therein so as to increase the density of said plasma, comprising the steps of confining said plasma column in a vacuum chamber between ionizing plates for supplying energetic particles to said plasma in a direction parallel to the axis of said plasma column, and interacting said plasma in a predetermined direction with externally supplied radio-frequency fields having a selectively variable power level amplitude and a sufficiently high frequency range for effecting the amplitude of said instabilities in accordance with the amplitude and frequency of said externally supplied fields that are interacted with said plasma, whereby said instabilities are stabilized for maintaining a plasma having a stable dynamic equilibrium of at least 2 X 1012 plasma particles /cm3 , and said radio-frequency fields have a frequency of 10 megahertz.
Claim 3
Dependent Claim
98 words
Method of dynamically controlling the density of an ionized plasma confined in a magnetic field by forming particles in a plasma column at a first rate, measuring the density of said plasma for determining the plasma loss rate from said column, and maintaining a balance between said aforementioned rates by selectively transmitting radio-frequency fields into said plasma at a frequency above the ion cyclotron frequency of said plasma, said radio-frequency fields being continuously varied to increase the density of said plasma in accordance with the rate of said continuous variation for effecting the maximizing of said plasma density.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |