US3569791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remanent-free pulsing magnets
Assignee: United States Atomic Energy Commission
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Filing: 1969-10-22
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Granted: 1971-03-09
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Expires: 1989-10-22
Abstract
Abstract Alternating current generator system for pulsing and demagnetizing a multipole magnet for focusing charged particles in a high energy accelerator beam by switching off the field coil of an AC generator and switching the generator output into the magnet whereby the inertia of rotation of the generator supplies energy to the magnet with low leakage inductance in the generator.
Inventors
- 👤 Uriel Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:16
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/20; H01F7/202; H01F7/204; H02; H02K; H02K39/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
65 words
Method for pulsing an electromagnet to produce a pulsed, high strength magnetic field, comprising rotating a field coil in an AC generator having a stator coil and an energized field coil, switching said field coil off, and switching the generator output to said magnet whereby the inertia of the said rotation in said generator supplies energy to the magnet in a decaying train of oscillations.
Claim 2
Dependent Claim
65 words
Method for pulsing an electromagnet to produce a pulsed, high strength magnetic field, comprising rotating a field coil in an AC generator having a stator coil and an energized field coil, switching said field coil off, and switching the generator output to said magnet whereby the inertia of the said rotation in said generator supplies energy to the magnet in a decaying train of oscillations.
Claim 3
Dependent Claim
39 words
The invention of claim 1 for pulsing said magnets up to several kilojoules of magnetic energy, wherein said switching takes place within a quarter cycle to produce said pulsing at an oscillation of between about 10 to 60 Hz.
Claim 4
Dependent Claim
18 words
The invention of claim 1 wherein said coils in said generator have a coupling coefficient close to unity.
Claim 5
Dependent Claim
39 words
The invention of claim 1 wherein the generator has a low output impedance matched with said magnet which is a quadrupole load magnet for producing a pulsed magnet field for focussing particles in a high energy charged particle beam.
Claim 6
Dependent Claim
13 words
The invention of claim 1 having a generator capable of three phase discharge.
Claim 7
Dependent Claim
86 words
Apparatus for pulsing a load magnet, comprising an AC generator having a stator coil and a rotatable field coil inductively closely coupled to each other, a trigger input means for selectively energizing and deenergizing said field coil, a voltage and phase sensor for detecting the deenergization of said field coil by said trigger input means, and trigger and swtiching unit means responsive to said detection for pulsing saiD load magnet with a decaying pulse of oscillations corresponding to the inertia of rotation of said field coil.
Claim 8
Dependent Claim
86 words
Apparatus for pulsing a load magnet, comprising an AC generator having a stator coil and a rotatable field coil inductively closely coupled to each other, a trigger input means for selectively energizing and deenergizing said field coil, a voltage and phase sensor for detecting the deenergization of said field coil by said trigger input means, and trigger and swtiching unit means responsive to said detection for pulsing saiD load magnet with a decaying pulse of oscillations corresponding to the inertia of rotation of said field coil.
Claim 9
Dependent Claim
29 words
The invention of claim 6 having means for changing the speed of rotation of said field coil for changing the time width of said pulsing of said load magnet.
Claim 10
Dependent Claim
43 words
The invention of claim 6 having a power source means for rotating said field coil of said generator, and means for disconnecting said source means from said rotation of said field coil for isolating the said source from said field coil and generator.
References Cited (Backward Citations)
US2301424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |