US3720828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and method of controlling relativistic charged particle beam distribution and transport
Assignee: Energy Sciences Inc
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Filing: 1970-08-18
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Granted: 1973-03-13
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Expires: 1990-08-18
Abstract
Abstract The present disclosure involves methods and apparatus for actively controlling the charged particle density in a controlled pressure region or in the ambient atmosphere, from an accelerator capable of producing high intensity relativistic charged particle streams in a pulsed manner. The techniques are applicable to both high repetition rate applications, typical of industrial processors, electron tubes or accelerator/fusion reactor injectors, and to single pulse or low repetition rate systems. These methods utilize the self-magnetic forces of relativistic beams to accomplish controlled distribution, and avoid the complexities of electromagnetic scanners or lenses heretofore used for this purpose. Methods are also disclosed which utilize force control in partially charged neutralized beams as well as plasma conductivity control in freely drifting beam systems.
Inventors
- 👤 S Nablo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:50
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/02; H; H01; H01J; H01J33/00; H01J5/00; H01J5/02; H01J5/18; H01J35/00; H01J35/02; H01J35/16; H01J35/18; H01J35/186
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
147 words
Apparatus for controlling charged relativistic particle beam flux over a predetermined area, having, in combination, highvacuum and low-pressure gas-containing chambers interconnected by low-pressure beam-permeable window means and with the lowpressure chamber provided with a further beam-permeable window means communicating with the external atmosphere and over a predetermined area of which a predetermined beam density is to be maintained, means for propagating the said beam from the highvacuum chamber through said low-pressure window means and upon said predetermined area of said further window means, means disposed proximal to said further window means for monitoring the charge density at a region of said predetermined area, and means controlled by the monitoring means for varying the gas pressure within said low-pressure chamber in accordance with the density monitored by said monitoring means in order to maintain the said predetermined beam flux over said predetermined area of said further window means.
Claim 2
Dependent Claim
147 words
Apparatus for controlling charged relativistic particle beam flux over a predetermined area, having, in combination, highvacuum and low-pressure gas-containing chambers interconnected by low-pressure beam-permeable window means and with the lowpressure chamber provided with a further beam-permeable window means communicating with the external atmosphere and over a predetermined area of which a predetermined beam density is to be maintained, means for propagating the said beam from the highvacuum chamber through said low-pressure window means and upon said predetermined area of said further window means, means disposed proximal to said further window means for monitoring the charge density at a region of said predetermined area, and means controlled by the monitoring means for varying the gas pressure within said low-pressure chamber in accordance with the density monitored by said monitoring means in order to maintain the said predetermined beam flux over said predetermined area of said further window means.
Claim 3
Dependent Claim
147 words
Apparatus for controlling charged relativistic particle beam flux over a predetermined area, having, in combination, high-vacuum and low-pressure gas-containing chambers interconnected by low-pressure beam-permeable window means and with the low-pressure chamber provided with a further beam-permeable window means communicating with the external atmosphere and over a predetermined area of which a predetermined beam density is to be maintained, means for propagating the said beam from the high-vacuum chamber through said low-pressure window means and upon said predetermined area of said further window means, means disposed proximal to said further window means for monitoring the charge density at a region of said predetermined area, and means controlled by the monitoring means for varying the gas pressure within said low-pressure chamber in accordance with the density monitored by said monitoring means in order to maintain the said predetermined beam flux over said predetermined area of said further window means.
Claim 4
Dependent Claim
147 words
Apparatus for controlling charged relativistic particle beam flux over a predetermined area, having, in combination, high-vacuum and low-pressure gas-containing chambers interconnected by low-pressure beam-permeable window means and with the low-pressure chamber provided with a further beam-permeable window means communicating with the external atmosphere and over a predetermined area of which a predetermined beam density is to be maintained, means for propagating the said beam from the high-vacuum chamber through said low-pressure window means and upon said predetermined area of said further window means, means disposed proximal to said further window means for monitoring the charge density at a region of said predetermined area, and means controlled by the monitoring means for varying the gas pressure within said low-pressure chamber in accordance with the density monitored by said monitoring means in order to maintain the said predetermined beam flux over said predetermined area of said further window means.
Claim 5
Dependent Claim
16 words
Apparatus as claimed in claim 1 and in which means is provided for pulsing said beam.
Claim 6
Dependent Claim
39 words
Apparatus as claimed in claim 2 and in which means is provided for adjusting the beam current density to a value of sufficient intensity to enable self-focusing of said current within said low-pressure chamber, acting as a drift space.
Claim 7
Dependent Claim
35 words
Apparatus as claimed in claim 2 and in which the walls of said low-pressure chamber are conducting and there is provided intermediate and within the drift space thereof, a plurality of spaced conducting vane members.
Claim 8
Dependent Claim
24 words
Apparatus as claimed in claim 4 and in which dielectric layer means is provided at the vane members near the centerline of the beam.
Claim 9
Dependent Claim
14 words
Apparatus as claimed in claim 4 and in which the said walls are curved.
Claim 10
Dependent Claim
22 words
Apparatus as claimed in claim 2 and in which means is provided in the low-pressure chamber for maintaining a predetermined glow discharge.
Claim 11
Dependent Claim
41 words
Apparatus as claimed in claim 7 and in which means is provided, responsive to the said monitoring means, for controlling the glow discharge to effect control of the said beam density over the said predetermined area of said further window means.
Claim 12
Dependent Claim
65 words
Apparatus for controlling charged relativistic particle beam density over a predetermined area having, in combination, a conducting low-pressure drift-space chamber, means including a high-vacuum chamber for propagating a charged particle beam into and along said drift-space chamber, and a plurality of spaced electrically floating conducting vane members dispersed along said drift-space chamber for producing beam image charge forces in the central region of the beam.
Claim 13
Dependent Claim
65 words
Apparatus for controlling charged relativistic particle beam density over a predetermined area having, in combination, a conducting low-pressure drift-space chamber, means including a high-vacuum chamber for propagating a charged particle beam into and along said drift-space chamber, and a plurality of spaced electrically floating conducting vane members dispersed along said drift-space chamber for producing beam image charge forces in the central region of the beam.
Claim 14
Dependent Claim
102 words
Apparatus for controlling charged relativistic particle beam density over a predetermined area having, in combination, a low-pressure chamber having means including a high-vacuum chamber for introducing a charged particle beam at one end and for permitting exit of the same at its other end through beam-permeable window means, means for maintaining a predetermined glow discharge in said low-pressure chamber, means disposed proximal to the window means for monitoring the charge density at a region thereof, and means controlled by the monitoring means for varying the said glow discharge in said low-pressure chamber in accordance with the density monitored by said monitoring means.
Claim 15
Dependent Claim
102 words
Apparatus for controlling charged relativistic particle beam density over a predetermined area having, in combination, a low-pressure chamber having means including a high-vacuum chamber for introducing a charged particle beam at one end and for permitting exit of the same at its other end through beam-permeable window means, means for maintaining a predetermined glow discharge in said low-pressure chamber, means disposed proximal to the window means for monitoring the charge density at a region thereof, and means controlled by the monitoring means for varying the said glow discharge in said low-pressure chamber in accordance with the density monitored by said monitoring means.
Claim 16
Dependent Claim
95 words
Apparatus for controlling charged relativistic particle beam density over a predetermined area having, in combination, a gas-containing low-pressure chamber having means including a high-vacuum chamber for introducing a charged particle beam at one end and for permitting exit of the same at its other end through beam-permeable window means, means disposed proximal To the window means for monitoring the charge density at a region thereof, and means controlled by the monitoring means for varying the conductivity of the said gas in the said low-pressure chamber in accordance with the density monitored by said monitoring means.
Claim 17
Dependent Claim
95 words
Apparatus for controlling charged relativistic particle beam density over a predetermined area having, in combination, a gas-containing low-pressure chamber having means including a high-vacuum chamber for introducing a charged particle beam at one end and for permitting exit of the same at its other end through beam-permeable window means, means disposed proximal To the window means for monitoring the charge density at a region thereof, and means controlled by the monitoring means for varying the conductivity of the said gas in the said low-pressure chamber in accordance with the density monitored by said monitoring means.
References Cited (Backward Citations)
US3510713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |