Patent US4101765A successfully refreshed from Google Patents.
US4101765A
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Means for counteracting charged particle beam divergence
Assignee: United States Department of Energy
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Filing: 1976-07-19
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Granted: 1978-07-18
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Expires: 1996-07-19
Abstract
Abstract To counteract charge particle beam divergence, magnetic field-generating means are positioned along the edges of a charged particle beam to be controlled, such as to deflect and redirect particles tending to diverge from a desired beam direction. By selective arrangement of the magnetic field-generating means, the entire beam may be deflected and guided into different directions.
Inventors
- 👤 Edwin B. Hooper, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:57
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/08; G21K1/093; G21K1/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
93 words
In combination with a neutral beam-generating system composed of a low energy beam section, an ion accelerator aligned to receive a beam from said low energy beam section, and a charge exchange cell aligned to receive the output from said accelerator; apparatus for counteracting charged particle beam divergence comprising means for forming a cusp-type magnetic field positioned about an associated neutral beam, said magnetic field forming means being positioned in said low energy beam section of said neutral beam-generating system for deflecting and redirecting particles tending to diverge from a desired beam direction.
Claim 2
Dependent Claim
93 words
In combination with a neutral beam-generating system composed of a low energy beam section, an ion accelerator aligned to receive a beam from said low energy beam section, and a charge exchange cell aligned to receive the output from said accelerator; apparatus for counteracting charged particle beam divergence comprising means for forming a cusp-type magnetic field positioned about an associated neutral beam, said magnetic field forming means being positioned in said low energy beam section of said neutral beam-generating system for deflecting and redirecting particles tending to diverge from a desired beam direction.
Claim 3
Dependent Claim
34 words
The apparatus defined in claim 1, wherein said means comprises a plurality of sets of electrically conductive members positioned in axially aligned, spaced relationship, each of said members carrying electrical current in alternating directions.
Claim 4
Dependent Claim
22 words
The apparatus defined in claim 2, wherein said sets of electrically conductive members each comprise a pair of spaced parallel wire loops.
Claim 5
Dependent Claim
44 words
The apparatus defined in claim 2, wherein at least one set of said electrically conductive members are positioned such that one of said members is at an angle with the other of said members, whereby causing a change in direction of an associated beam.
Claim 6
Dependent Claim
24 words
The combination defined in claim 1, wherein said low energy beam section is composed of a positive ion source and a charge exchange cell.
Claim 7
Independent Claim
106 words
A method for preventing substantial loss of current density of a charged particle beam in neutral beam-generating systems due to divergence of the particles caused by a transverse velocity component comprising the step of generating magnetic fields along the edges of the charged particle beam such as to deflect beam particles tending to diverge from a desired beam direction by positioning a plurality of spaced substantially parallel electrically conductive loops along the longitudinal length of the beam, and passing electric current through the loops in a direction opposite the direction of current flow in an adjacent loop creating cusp-type magnetic fields about the charged particle beam.
Claim 8
Independent Claim
106 words
A method for preventing substantial loss of current density of a charged particle beam in neutral beam-generating systems due to divergence of the particles caused by a transverse velocity component comprising the step of generating magnetic fields along the edges of the charged particle beam such as to deflect beam particles tending to diverge from a desired beam direction by positioning a plurality of spaced substantially parallel electrically conductive loops along the longitudinal length of the beam, and passing electric current through the loops in a direction opposite the direction of current flow in an adjacent loop creating cusp-type magnetic fields about the charged particle beam.
Claim 9
Dependent Claim
37 words
The method defined in claim 6, additionally including the steps of positioning at least one of the loops at an angle with respect to at least one other loop causing a change in direction of the beam.
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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |