US3571734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of production, acceleration and interaction of charged-particle beams and device for the execution of said method
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
•
Filing: 1969-11-21
•
Granted: 1971-03-23
•
Expires: 1989-11-21
Abstract
Abstract A method of accelerating particles of a nonionized or preionized ionizable gas parallel to an axis which consists in applying to said gas at least one high-frequency electromagnetic field having a frequency greater than 109 c/s, a so-called axial magnetic field having symmetry of revolution, a so-called radial magnetic field, said high frequency of the electromagnetic field being determined as a function of the amplitude of the axial magnetic field so that said electromagnetic field should yield energy to the ionized gas by cyclotron resonance, the ionized gas being then directed into a discharge space after having been subjected to the high-frequency field, and a device for the application of said method.
Inventors
- 👤 Terenzio Consoli
- 👤 Rene Bardet
- 👤 Richard Geller
- 👤 Bernard Jacquot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:32
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/54; H01; H01J; H01J37/00; H01J37/32; H05H1/02; H05H1/16; H05H1/18; H05H1/24; H05H1/46
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
148 words
A method of acceleration of particles of an ionizable gas parallel to an axis, which consists in applying to said gas within at least one resonant structure a high-frequency electromagnetic field which is perpendicular to the direction of propagation, an axial magnetic field having symmetry of revolution and a gradient in the axial direction, and a radial magnetic field having a minimum amplitude in at least one central region, said high frequency of the electromagnetic field being determined as a function of the amplitude of the axial magnetic field so that said electromagnetic field should yield energy to the ionized gas by cyclotron resonance in a region adjacent to that in which the electric component of the electromagnetic field is of maximum amplitude, the beam constituted by the particles of ionized gas being then directed into a discharge space after having passed through at last one resonant structure.
Claim 2
Independent Claim
148 words
A method of acceleration of particles of an ionizable gas parallel to an axis, which consists in applying to said gas within at least one resonant structure a high-frequency electromagnetic field which is perpendicular to the direction of propagation, an axial magnetic field having symmetry of revolution and a gradient in the axial direction, and a radial magnetic field having a minimum amplitude in at least one central region, said high frequency of the electromagnetic field being determined as a function of the amplitude of the axial magnetic field so that said electromagnetic field should yield energy to the ionized gas by cyclotron resonance in a region adjacent to that in which the electric component of the electromagnetic field is of maximum amplitude, the beam constituted by the particles of ionized gas being then directed into a discharge space after having passed through at last one resonant structure.
Claim 3
Dependent Claim
23 words
A method of acceleration in accordance with claim 1, in which the radial magnetic field and the axial magnetic field are pulse modulated.
Claim 4
Dependent Claim
50 words
A method for acceleration in accordance with claim 1, in which the axial magnetic field varies along the axis of propagation of the beam according to a law of variation which decreases in a monotonous manner from the region of the resonant structure to the end of the discharge space.
Claim 5
Dependent Claim
65 words
A method of acceleration in accordance with claim 1, in which the axial magnetic field varies along the axis of propagation of the beam according to a law of variation which increases in a symmetrical manner starting from a plane located in the vicinity of the center of the discharge space and said field creates magnetic mirror effects near the ends of the discharge space.
Claim 6
Dependent Claim
122 words
A method of acceleration in accordance with claim 1 which consists in directing towards the beam formed by ionized particles of a gas a second beam which is also constituted by the ionized particles of a gas and which has a common axis but is of opposite direction, in creating an axial magnetic field so as to produce magnetic mirror effects near the ends of the discharge space, said field being intended to vary according to a symmetrically increasing law on each side of a plane located in the vicinity of the center of the discharge space, and in applying to said second beam within at least one resonant structure a high-frequency electromagnetic field which is perpendicular to the direction of propagation.
Claim 7
Dependent Claim
109 words
An acceleration device which comprises an ionizable gas source, at least one discharge chamber having a generally cylindrical shape and connected to vacuum pumps, a unit for producing within said chamber an axial magnetic field and preferably constituted by axial coils and a unit for producing within said chamber a radial magnetic field formed by series mounted conductive rods substantially parallel to the axis of said chamber and coaxially spaced around a cylindrical surfaCe of said chamber, one or a plurality of units each designed to apply within said chamber a high-frequency electromagnetic field and inserted in a duct which serves to connect said source to the discharge chamber.
Claim 8
Dependent Claim
109 words
An acceleration device which comprises an ionizable gas source, at least one discharge chamber having a generally cylindrical shape and connected to vacuum pumps, a unit for producing within said chamber an axial magnetic field and preferably constituted by axial coils and a unit for producing within said chamber a radial magnetic field formed by series mounted conductive rods substantially parallel to the axis of said chamber and coaxially spaced around a cylindrical surfaCe of said chamber, one or a plurality of units each designed to apply within said chamber a high-frequency electromagnetic field and inserted in a duct which serves to connect said source to the discharge chamber.
Claim 9
Dependent Claim
25 words
An acceleration device in accordance with claim 6, in which the conductive rods which produce the radial magnetic field are maintained in the superconducting state.
Claim 10
Dependent Claim
66 words
An acceleration device in accordance with claim 6, in which the unit or units for applying a high-frequency field to the charged particles is at least one cylindrical resonant cavity which oscillates in a TEmnp mode and said field yields energy to said particles in a region close to that in which the amplitude of the electric component of the high-frequency field is of maximum value.
Claim 11
Dependent Claim
21 words
An acceleration device in accordance with claim 6, in which the unit for applying the high-frequency field is a transmission line.
Claim 12
Dependent Claim
57 words
An acceleration device in accordance with claim 6, in which the unit which applies the high-frequency field to the charged particles is a cavity coupled to a circular section waveguide in which is propagated a traveling wave having transverse circular polarization, said waveguide comprising a dielectric window which is impervious to gases but transparent to electromagnetic energy.
Claim 13
Dependent Claim
88 words
An acceleration device in accordance with claim 6, in which the space for the application of high-frequency energy to the charged particles comprises a plurality of resonant cavities which oscillate in TEmnp modes and the high-frequency fields yield energy to said particles respectively in regions adjacent to those in which the amplitude of the electric components of the high-frequency fields are of maximum value, said high frequencies being determined as a function of the amplitudes of the axial field in those regions in which energy yields take place.
Claim 14
Independent Claim
184 words
A device, having a symmetrical structure, for accelerating two intense beams of particles towards each other, comprising two sources of ionizable gas each furnishing one of the intense beams of particles, a discharge chamber of generally cylindrical shape which is connected to vacuum pumps, a unit for producing within said chamber an axial magnetic field constituted by axial coils, said axial magnetic field having a plane of symmetry located in the vicinity of the center of the discharge chamber, a unit for producing within said chamber a radial magnetic field formed by series mounted conductive rods which are substantially parallel to the axis of said discharge chamber and coaxially spaced around a cylindrical surface of said chamber, at least one pair of resonant structures for the application of high-frequency electromagnetic fields and disposed in ducts which serve to connect said sources to the discharge chamber across the beams, said axial coils producing magnetic mirror effects in the areas where the structures providing said high-frequency fields are located, said rods producing said radial magnetic field extending up to said areas of the magnetic mirror effects.
Claim 15
Independent Claim
184 words
A device, having a symmetrical structure, for accelerating two intense beams of particles towards each other, comprising two sources of ionizable gas each furnishing one of the intense beams of particles, a discharge chamber of generally cylindrical shape which is connected to vacuum pumps, a unit for producing within said chamber an axial magnetic field constituted by axial coils, said axial magnetic field having a plane of symmetry located in the vicinity of the center of the discharge chamber, a unit for producing within said chamber a radial magnetic field formed by series mounted conductive rods which are substantially parallel to the axis of said discharge chamber and coaxially spaced around a cylindrical surface of said chamber, at least one pair of resonant structures for the application of high-frequency electromagnetic fields and disposed in ducts which serve to connect said sources to the discharge chamber across the beams, said axial coils producing magnetic mirror effects in the areas where the structures providing said high-frequency fields are located, said rods producing said radial magnetic field extending up to said areas of the magnetic mirror effects.
Claim 16
Dependent Claim
112 words
An acceleration device comprising an ionizable gas source, a discharge chamber having a generally cylindrical shape with a long axis and connected to vacuum pumps, a unit for producing within said chamber an axial magnetic field constituted by axial coils, said axial magnetic field having a plane of symmetry located in the vicinity of the center of the discharge chamber, a unit for producing within said chamber a radial magnetic field comprising series mounted conductive rods substantially parallel to said axis and spaced coaxially around a cylindrical surface of said chamber and extending up to said ends of said chamber and at least one unit for applying a high-frequency electromagnetic field inserted.
Claim 17
Dependent Claim
112 words
An acceleration device comprising an ionizable gas source, a discharge chamber having a generally cylindrical shape with a long axis and connected to vacuum pumps, a unit for producing within said chamber an axial magnetic field constituted by axial coils, said axial magnetic field having a plane of symmetry located in the vicinity of the center of the discharge chamber, a unit for producing within said chamber a radial magnetic field comprising series mounted conductive rods substantially parallel to said axis and spaced coaxially around a cylindrical surface of said chamber and extending up to said ends of said chamber and at least one unit for applying a high-frequency electromagnetic field inserted.
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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |