US3671855A
Expired / Lapsed
US
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Broadband zero field exchange echo system
Assignee: Westinghouse Electric Corp
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Filing: 1969-07-28
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Granted: 1972-06-20
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Expires: 1989-07-28
Abstract
Abstract A system for the generation of an ''''exchange echo'''' signal similar to a spin echo signal utilizing a very heavily doped sample such as rutile, having paramagnetic defect centers in the order of 1 X 1019 to 1 X 1021 defect centers/cm, wherein no magnetic field of any kind is necessary for the production of the echo signals, and wherein echo bandwidths considerably greater than those generally associated with spin echoes (less than 300 MHz) are achievable.
Inventors
- 👤 Donald A Bozanic
- 👤 Dickron Mergerian
- 👤 Ronald W Minarik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:37
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/60
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
127 words
An ''''exchange echo'''' system comprising in combination: means providing a first and a second RF microwave pulse separated by a predetermined time interval; waveguide transmission line means coupled to said means providing said first and said second RF microwave pulse; an ''''exchange echo'''' sample comprising a heavily doped host material having paramagnetic defect centers consisting of iron group transition metal ions in the order of 1 X 1020 defect centers/cm3 located in said waveguide transmission line means, being responsive to said first and second RF microwave pulses; and a means surrounding said ''''exchange echo'''' sample for reducing the temperature of said sample to a predetermined cryogenic temperature, said ''''exchange echo'''' sample generating an ''''exchange echo'''' signal upon the reception of said first and second RF microwave pulses.
Claim 2
Dependent Claim
127 words
An ''''exchange echo'''' system comprising in combination: means providing a first and a second RF microwave pulse separated by a predetermined time interval; waveguide transmission line means coupled to said means providing said first and said second RF microwave pulse; an ''''exchange echo'''' sample comprising a heavily doped host material having paramagnetic defect centers consisting of iron group transition metal ions in the order of 1 X 1020 defect centers/cm3 located in said waveguide transmission line means, being responsive to said first and second RF microwave pulses; and a means surrounding said ''''exchange echo'''' sample for reducing the temperature of said sample to a predetermined cryogenic temperature, said ''''exchange echo'''' sample generating an ''''exchange echo'''' signal upon the reception of said first and second RF microwave pulses.
Claim 3
Dependent Claim
22 words
The invention as defined in by claim 1 wherein said waveguide transmission line means additionally includes a microwave cavity enclosing said sample.
Claim 4
Dependent Claim
30 words
The invention as defined by claim 2 wherein said iron group transition metal ions have a concentration in the range of 1 X 1019 to 1 X 1021 defect centers/cm3.
Claim 5
Dependent Claim
17 words
The invention as defined by claim 3 wherein said sample is comprised of iron doped zinc tungstate.
Claim 6
Dependent Claim
18 words
The invention as defined by claim 1 wherein the sample is doped with iron group transition metal ions.
Claim 7
Dependent Claim
18 words
The invention as defined by claim 5 wherein said cryogenic temperature is in the region of 4* K.
Claim 8
Dependent Claim
16 words
The invention as defined by claim 6 wherein said material is comprised of iron doped rutile.
Claim 9
Dependent Claim
16 words
The invention as defined by claim 7 wherein said material is comprised of chromium doped rutile.
Claim 10
Dependent Claim
17 words
The invention as defined by claim 6 wherein said material is comprised of iron doped strontium titanate.
Claim 11
Dependent Claim
17 words
The invention as defined by claim 6 wherein said material is comprised of iron doped barium titanate.
Claim 12
Dependent Claim
19 words
The invention as defined by claim 1 wherein the means surrounding said ''''exchange echo'''' sample material comprises a cryostat.
Claim 13
Dependent Claim
14 words
The invention as defined by claim 11 wherein said cryostat additionally includes liquid helium.
References Cited (Backward Citations)
US3324461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |