US6420872B1
Expired / Lapsed
US
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Probe for detecting a transient magnetic resonance signal, wherein the ratio of the Q of the probe to the Q of the resonance signal is relatively large
Assignee: United States Department of the Navy
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Filing: 1998-01-13
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Granted: 2002-07-16
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Expires: 2018-01-13
Abstract
Abstract An apparatus which includes a probe for detecting a resonance signal induced in a sample. The probe and the resonance signal each have a respective, corresponding Q, and the ratio, Q', of the Q of the probe to the Q of the resonance signal is relatively large. Preferably, Q' is greater than, or equal to, 1.
Inventors
- 👤 Allen N. Garroway
- 👤 Joel B. Miller
- 👤 Bryan H. Suits
- 👤 Richard L. Garwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:22
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/32; G01R33/36; G01R33/34; G01R33/34046; G01R33/34053
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
130 words
A resonance apparatus for super-Q detection comprising: a probe for detecting a resonance signal induced in a sample; said probe comprising a coil; wherein said probe forms a tuned tank circuit; wherein the bandwidth of said probe is narrower than the bandwidth of said resonance signal; wherein the probe has a Q probe =f probe /Δf probe , wherein f probe is the resonant frequency of the probe, and Δf probe is the full width at half height (FWHH) bandwidth of the probe; wherein the resonance signal has a Q RS =f 0 /Δf RS , wherein f 0 is the center frequency for the resonance signal, and wherein Δf RS is the FWHH bandwidth of the signal; and wherein the ratio Q′=Q probe /Q RS is greater than one.
Claim 2
Dependent Claim
130 words
A resonance apparatus for super-Q detection comprising: a probe for detecting a resonance signal induced in a sample; said probe comprising a coil; wherein said probe forms a tuned tank circuit; wherein the bandwidth of said probe is narrower than the bandwidth of said resonance signal; wherein the probe has a Q probe =f probe /Δf probe , wherein f probe is the resonant frequency of the probe, and Δf probe is the full width at half height (FWHH) bandwidth of the probe; wherein the resonance signal has a Q RS =f 0 /Δf RS , wherein f 0 is the center frequency for the resonance signal, and wherein Δf RS is the FWHH bandwidth of the signal; and wherein the ratio Q′=Q probe /Q RS is greater than one.
Claim 3
Dependent Claim
15 words
An apparatus as in claim 1 , wherein Q′ is in the range of 1<Q′≦3.
Claim 4
Dependent Claim
16 words
An apparatus as in claim 1 , wherein Q′ is greater than, or equal to, 3.
Claim 5
Dependent Claim
16 words
An apparatus as in claim 1 , wherein Q′ is greater than, or equal to, 10.
Claim 6
Dependent Claim
48 words
An apparatus as in claim 1 , wherein the probe detects a combined signal which includes the resonance signal and noise, the apparatus further comprising: a receiver receiving the combined signal from the probe and detecting the resonance signal from the combined signal by integrating the combined signal.
Claim 7
Dependent Claim
58 words
An apparatus as in claim 4 , wherein the probe detects a combined signal which includes the resonance signal and noise, the apparatus further comprising: a receiver receiving the combined signal from the probe and detecting the resonance signal from the combined signal by detecting a step increase over time in the power level of the combined signal.
Claim 8
Dependent Claim
16 words
An apparatus as in claim 1 , wherein the resonance signal is a magnetic resonance signal.
Claim 9
Dependent Claim
37 words
An apparatus as in claim 1 , wherein the resonance signal is one of the group consisting of a Nuclear Magnetic Resonance (NMR) signal, a Nuclear Quadrupole Resonance (NQR) signal and an Electron Paramagnetic Resonance (EPR) signal.
Claim 10
Dependent Claim
25 words
An apparatus as in claim 1 , wherein the probe induces the resonance signal in the sample by emitting an RF field towards the sample.
Claim 11
Dependent Claim
137 words
A resonance apparatus for super-Q detection comprising: a probe for detecting a Nuclear Quadrupole Resonance (NQR) signal induced in a sample said probe comprising a coil; wherein said probe forms a tuned tank circuit; wherein the band with of said probe is narrower than the bandwidth of said resonance signal; wherein the probe has a Q probe =f probe /Δf probe , wherein f probe is the resonant frequency of the probe, and Δf probe is the full width at half height (FWHH) bandwidth of the probe; wherein the resonance signal has a Q RS =f 0 /Δf RS , wherein f 0 is the center frequency for the resonance signal, and wherein Δf RS is the FWHH bandwidth of the signal; and wherein the ratio Q′=Q probe /Q RS is greater than or equal to 0.3.
Claim 12
Dependent Claim
137 words
A resonance apparatus for super-Q detection comprising: a probe for detecting a Nuclear Quadrupole Resonance (NQR) signal induced in a sample said probe comprising a coil; wherein said probe forms a tuned tank circuit; wherein the band with of said probe is narrower than the bandwidth of said resonance signal; wherein the probe has a Q probe =f probe /Δf probe , wherein f probe is the resonant frequency of the probe, and Δf probe is the full width at half height (FWHH) bandwidth of the probe; wherein the resonance signal has a Q RS =f 0 /Δf RS , wherein f 0 is the center frequency for the resonance signal, and wherein Δf RS is the FWHH bandwidth of the signal; and wherein the ratio Q′=Q probe /Q RS is greater than or equal to 0.3.
Claim 13
Dependent Claim
15 words
An apparatus as in claim 10 , wherein Q′ is in the range of 0.3<Q′≦1.
Claim 14
Dependent Claim
15 words
An apparatus as in claim 10 , wherein Q′ is in the range of 1<Q′≦3.
Claim 15
Dependent Claim
16 words
An apparatus as in claim 10 , wherein Q′ is greater than, or equal to, 1.
Claim 16
Dependent Claim
16 words
An apparatus as in claim 10 , wherein Q′ is greater than, or equal to, 3.
Claim 17
Dependent Claim
16 words
An apparatus as in claim 10 , wherein Q′ is greater than, or equal to, 10.
Claim 18
Dependent Claim
48 words
An apparatus as in claim 13 , wherein the probe detects a combined signal which includes the NQR signal and noise, the apparatus further comprising: a receiver receiving the combined signal from the probe and detecting the NQR signal from the combined signal by integrating the combined signal.
Claim 19
Dependent Claim
58 words
An apparatus as in claim 15 , wherein the probe detects a combined signal which includes the NQR signal and noise, the apparatus further comprising: a receiver receiving the combined signal from the probe and detecting the NQR signal from the combined signal by detecting a step increase over time in the power level of the combined signal.
Claim 20
Dependent Claim
25 words
An apparatus as in claim 10 , wherein the probe induces the NQR signal in the sample by emitting an RF field towards the sample.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2005-07-15 | 2006-01-14 | 2006-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-07-15 | 2010-01-14 | 2010-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-07-15 | 2014-01-14 | 2014-07-16 | $7700.00 | Window Closed / Lapsed |