US3700899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a beam of polarized atoms
Assignee: United States Atomic Energy Commission
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Filing: 1971-08-26
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Granted: 1972-10-24
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Expires: 1991-08-26
Abstract
Abstract A polarized beam of atoms is generated by forming a plurality of apertures of micron-sized diameter through a magnetically saturated monocrystalline material and passing in a partial vacuum a collimated beam of atoms through said apertures incident to the walls thereof. The monocrystalline material effects a charge-transfer reaction with the atomic beam to produce a polarized beam of atoms, the nuclei of which are subsequently polarized by hyperfine interaction in a weak external magnetic field.
Inventors
- 👤 Manfred S Kaminsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:37
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
36 words
The method according to claim 1 wherein said atomic beam is collimated to provide a maximum half-angle of divergence from the axis of transmission of said beam at the sUrface of said monocrystalline material of 0.01*.
Claim 2
Dependent Claim
35 words
The method according to claim 1 wherein said atomic beam is transmitted to impinge on the interior surface of said aperture at an incident angle with respect thereto greater than 89* and less than 90*.
Claim 3
Dependent Claim
32 words
The method according to claim 1 wherein said aperture is generated having an aperture diameter to length ratio between 1/500 and 1/5,000 and having a diameter between 0.1 micron and 1.0 micron.
Claim 4
Dependent Claim
35 words
The method according to claim 1 wherein said atomic beam is transmitted through said aperture to be incident on the interior wall thereof and pass through said monocrystalline material a distance less than 0.2 microns.
Claim 5
Dependent Claim
74 words
The method according to claim 1 further including generating a magnetic field, and transmitting said atomic beam adiabatically from said magnetically saturated monocrystalline material through said magnetic field a distance in the direction of transmission of said atomic beam sufficient to provide a transit time therefor greater than the Lamor precession time of the nuclear magnetic moment of the nuclei of the atomic beam to effect nuclear polarization of said beam by hyperfine interaction.
Claim 6
Dependent Claim
25 words
The method according to claim 6 wherein said magnetic field is generated in the same directional sense as the magnetic saturation of said monocrystalline material.
Claim 7
Dependent Claim
49 words
The method according to claim 6 wherein said beam of atoms is transmitted through said aperture to engage the interior wall thereof adjacent the beam exit side of said monocrystalline material and pass through said monocrystalline material a distance to effect a charge transfer therewith and polarize said beam.
Claim 8
Independent Claim
96 words
A method of polarizing a beam of atoms comprising forming an aperture through a monocrystalline material parallel to a lattice channel therein, magnetically saturating said monocrystalline material in a direction normal to said aperture, collimating said beam of atoms to provide a maximum half angle of divergence from the axis of transmission of said beam at the surface of said monocrystalline material of 0.01*, generating a partial vacuum, transmitting said collimated beam in said partial vacuum through said aperture to interact with the interior wall thereof and effect a charge-transfer reaction therewith the polarize said beam.
Claim 9
Dependent Claim
65 words
The method according to claim 9 wherein said aperture has a diameter greater than 0.1 micron and less than 1.0 micron and a diameter to length ratio greater than 1/5,000 and less than 1/500, and said beam is transmitted through said aperture to impinge on the interior surface thereof with an incident angle thereto greater than 89* and effect a charge-transfer polarization of said beam.
Claim 10
Dependent Claim
35 words
The method according to claim 9 wherein said beam is transmitted to pass through said monocrystalline material a distance less than 0.2 microns while traversing said aperture to effect a charge-transfer polarization of said 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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |