Patent US3887832A successfully refreshed from Google Patents.
US3887832A
Expired / Lapsed
US
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Auto-resonant acceleration of ions
Assignee: ARALCO
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Filing: 1973-06-25
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Granted: 1975-06-03
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Expires: 1993-06-25
Abstract
Abstract Accelerating ions utilizing a relativistic electron beam in a static, inhomogeneous magnetic field, the electron beam resonating in the cyclotron waveguide mode. Accelerating power is efficiently furnished to the driven ion particles by the electron beam through the intermediary of the cyclotron mode, hence causing acceleration to high energy levels of the ions trapped therewith.
Inventors
- 👤 William E Drummond
- 👤 Millard L Sloan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:21
CPC Classifications
H; H05; H05H; H05H7/00; H05H7/06; H05H9/00; H05H9/02
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
121 words
A linear accelerator for accelerating injected ions, comprising a longitudinal waveguide creating a conductive boundary, a vacuum chamber enclosing said waveguide, means for establishing a longitudinal static magnetic field in said waveguide, said magnetic field being large at the entrance of said waveguide and decreasing to a small valve at the exit of said waveguide, means for injecting ions into said waveguide, means for establishing an intense beam of electrons immersed in said magnetic field, said electron beam and magnetic field sustaining a traveling wave that is the lower branch of the upper hybrid resonant cyclotron eigenmode of said beam, the phase velocity of said wave increaSing in such a manner as to accelerate the injected ions trapped in said wave.
Claim 2
Dependent Claim
121 words
A linear accelerator for accelerating injected ions, comprising a longitudinal waveguide creating a conductive boundary, a vacuum chamber enclosing said waveguide, means for establishing a longitudinal static magnetic field in said waveguide, said magnetic field being large at the entrance of said waveguide and decreasing to a small valve at the exit of said waveguide, means for injecting ions into said waveguide, means for establishing an intense beam of electrons immersed in said magnetic field, said electron beam and magnetic field sustaining a traveling wave that is the lower branch of the upper hybrid resonant cyclotron eigenmode of said beam, the phase velocity of said wave increaSing in such a manner as to accelerate the injected ions trapped in said wave.
Claim 3
Dependent Claim
121 words
A linear accelerator for accelerating injected ions, comprising a longitudinal waveguide creating a conductive boundary, a vacuum chamber enclosing said waveguide, means for establishing a longitudinal static magnetic field in said waveguide, said magnetic field being large at the entrance of said waveguide and decreasing to a small valve at the exit of said waveguide, means for injecting ions into said waveguide, means for establishing an intense beam of electrons immersed in said magnetic field, said electron beam and magnetic field sustaining a traveling wave that is the lower branch of the upper hybrid resonant cyclotron eigenmode of said beam, the phase velocity of said wave increaSing in such a manner as to accelerate the injected ions trapped in said wave.
Claim 4
Dependent Claim
121 words
A linear accelerator for accelerating injected ions, comprising a longitudinal waveguide creating a conductive boundary, a vacuum chamber enclosing said waveguide, means for establishing a longitudinal static magnetic field in said waveguide, said magnetic field being large at the entrance of said waveguide and decreasing to a small valve at the exit of said waveguide, means for injecting ions into said waveguide, means for establishing an intense beam of electrons immersed in said magnetic field, said electron beam and magnetic field sustaining a traveling wave that is the lower branch of the upper hybrid resonant cyclotron eigenmode of said beam, the phase velocity of said wave increaSing in such a manner as to accelerate the injected ions trapped in said wave.
Claim 5
Dependent Claim
26 words
A linear accelerator as set forth in claim 1, wherein said vacuum chamber permits the presence of plasma for aiding the propogation of said electron beam.
Claim 6
Dependent Claim
32 words
A linear accelerator as set forth in claim 1, wherein said conductive boundary includes a tubular waveguide flaring from a small dimension at its entrance to a large dimension at its exit.
Claim 7
Dependent Claim
49 words
A linear accelerator as set forth in claim 1, wherein said means for establishing the magnetic field includes a plurality of magnetic field coils successively spaced further apart starting from the vicinity of the entrance of said waveguide and concluding in the vicinity of the exit of said waveguide.
Claim 8
Dependent Claim
18 words
A linear accelerator as set forth in claim 1, wherein said waveguide is substantially free of internal constrictions.
Claim 9
Dependent Claim
123 words
A linear accelerator for accelerating injected ions, comprising a longitudinal waveguide creating a conductive boundary, a vacuum chamber enclosing said waveguide, means for establishing a longitudinal static magnetic field in said waveguide, said magnetic field being large at the entrance of said waveguide and decreasing to a small value at the exit of said waveguide, means for injecting ions into said waveguide, means for establishing an intense beam of relativistic electrons immersed in said magnetic field, said electron beam and magnetic field sustaining a traveling wave that is the lower branch of the upper hybrid resonant cyclotron eigenmode of said relativistic beam, the phase velocity of said wave increasing in such a manner as to accelerate the injected ions trapped in said wave.
Claim 10
Dependent Claim
123 words
A linear accelerator for accelerating injected ions, comprising a longitudinal waveguide creating a conductive boundary, a vacuum chamber enclosing said waveguide, means for establishing a longitudinal static magnetic field in said waveguide, said magnetic field being large at the entrance of said waveguide and decreasing to a small value at the exit of said waveguide, means for injecting ions into said waveguide, means for establishing an intense beam of relativistic electrons immersed in said magnetic field, said electron beam and magnetic field sustaining a traveling wave that is the lower branch of the upper hybrid resonant cyclotron eigenmode of said relativistic beam, the phase velocity of said wave increasing in such a manner as to accelerate the injected ions trapped in said wave.
Claim 11
Dependent Claim
26 words
A linear accelerator as set forth in claim 6, wherein said vacuum chamber permits the presence of plasma for aiding the propogation of said electron beam.
Claim 12
Dependent Claim
32 words
A linear accelerator as set forth in claim 6, wherein said conductive boundary includes a tubular waveguide flaring from a small dimension at its entrance to a large dimension at its exit.
Claim 13
Dependent Claim
49 words
A linear accelerator as set forth in claim 6, wherein said means for establishing the magnetic field includes a plurality of magnetic field coils successively spaced further apart starting from the vicinity of the entrance of said waveguide and concluding in the vicinity of the exit of said waveguide.
Claim 14
Dependent Claim
18 words
A linear accelerator as set forth in claim 6, wherein said waveguide is substantially free of internal constrictions.
Claim 15
Dependent Claim
154 words
In combination with an electron beam generator for establishing an intense relativistic beam, and means for exciting a traveling wave that is the lower branch of the upper hybrid resonant cyclotron eigenmode of said relativistic beam and for loading ions to be accelerated on said wave, the improvement in a linear accelerator comprising a longitudinal waveguide for creating a conductive boundary, the entrance of said waveguide connected to receive the ion-loaded, relativistic beam, an evacuated chamber enclosing said waveguide, means for establishing a longitudinal static magnetic field within said waveguide, said magnetic field being large at the entrance of said waveguide and decreasing to a relatively small value at the exit of said waveguide, said magnetic field sustaining a traveling wave that is the lower branch of the upper hybrid resonant cyclotron eigenmode of said relativistic beam, the phase velocity of said relativistic beam accelerating at a rate to carry the injected ions therewith.
Claim 16
Dependent Claim
154 words
In combination with an electron beam generator for establishing an intense relativistic beam, and means for exciting a traveling wave that is the lower branch of the upper hybrid resonant cyclotron eigenmode of said relativistic beam and for loading ions to be accelerated on said wave, the improvement in a linear accelerator comprising a longitudinal waveguide for creating a conductive boundary, the entrance of said waveguide connected to receive the ion-loaded, relativistic beam, an evacuated chamber enclosing said waveguide, means for establishing a longitudinal static magnetic field within said waveguide, said magnetic field being large at the entrance of said waveguide and decreasing to a relatively small value at the exit of said waveguide, said magnetic field sustaining a traveling wave that is the lower branch of the upper hybrid resonant cyclotron eigenmode of said relativistic beam, the phase velocity of said relativistic beam accelerating at a rate to carry the injected ions therewith.
Claim 17
Dependent Claim
26 words
A linear accelerator as set forth in claim 11, wherein said evacuated chamber permits the presence of plasma for aiding the propogation of said electron beam.
Claim 18
Dependent Claim
32 words
A linear accelerator as set forth in claim 11, wherein said conductive boundary includes a tubular waveguide flaring from a small dimension at its entrance to a large dimension at its exit.
Claim 19
Dependent Claim
49 words
A linear accelerator as set forth in claim 11, wherein said means for establishing the magnetic field includEs a plurality of magnetic field coils successively spaced further apart starting from the vicinity of the entrance of said waveguide and concluding in the vicinity of the exit of said waveguide.
Claim 20
Dependent Claim
18 words
A linear accelerator as set forth in claim 11, wherein said waveguide is substantially free of internal constrictions.
Claim 21
Independent Claim
140 words
The method of accelerating ions, which comprises the steps of creating in an evacuated environment a longitudinal static magnetic field along a path, said magnetic field graduating from a large value at the entrance of said path and decreasing spatially to a relatively small value at the exit of said path, establishing an intense beam of electrons into the entrance of said path, establishing in the medium of said magnetic field and said beam of electrons a traveling wave that is the lower branch of the upper hybrid cyclotron mode of said beam, and injecting ions to be accelerated onto said traveling wave to effect the loading of said ions about the minima of the potential of said wave, the phase velocity of said wave increasing in such a manner as to accelerate the injected ions trapped in said wave.
Claim 22
Independent Claim
140 words
The method of accelerating ions, which comprises the steps of creating in an evacuated environment a longitudinal static magnetic field along a path, said magnetic field graduating from a large value at the entrance of said path and decreasing spatially to a relatively small value at the exit of said path, establishing an intense beam of electrons into the entrance of said path, establishing in the medium of said magnetic field and said beam of electrons a traveling wave that is the lower branch of the upper hybrid cyclotron mode of said beam, and injecting ions to be accelerated onto said traveling wave to effect the loading of said ions about the minima of the potential of said wave, the phase velocity of said wave increasing in such a manner as to accelerate the injected ions trapped in said wave.
Claim 23
Dependent Claim
28 words
The method of accelerating ions as set forth in claim 16, wherein said ions are injected at substantially the same speed as the initial speed of said wave.
Claim 24
Independent Claim
143 words
The method of accelerating ions, which comprises the steps of creating in an evacuated environment a longitudinal static magnetic field along a path, said magnetic field graduating from a large value at the entrance of said path and decreasing spatially to a relatively small value at the exit of said path, establishing an intense relativistic beam of electrons into the entrance of said path, establishing in the medium of said magnetic field and said relativistic beam of electrons a traveling wave that is the lower brance of the upper hybrid cyclotron mode of said relativistic beam, and injecting ions to be accelerated onto said traveling wave to effect the loading of said ions about the minima of the potential of said wave, the phase velocity of said wave increasing in such a manner as to accelerate the injected ions trapped in said wave.
Claim 25
Independent Claim
143 words
The method of accelerating ions, which comprises the steps of creating in an evacuated environment a longitudinal static magnetic field along a path, said magnetic field graduating from a large value at the entrance of said path and decreasing spatially to a relatively small value at the exit of said path, establishing an intense relativistic beam of electrons into the entrance of said path, establishing in the medium of said magnetic field and said relativistic beam of electrons a traveling wave that is the lower brance of the upper hybrid cyclotron mode of said relativistic beam, and injecting ions to be accelerated onto said traveling wave to effect the loading of said ions about the minima of the potential of said wave, the phase velocity of said wave increasing in such a manner as to accelerate the injected ions trapped in said wave.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |