Scanning a band of frequencies using an array of high temperature superconductor sensors tuned to different frequencies
First Claim
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1. A method for scanning a band of frequencies Δ
- F with a nuclear quadrupole resonance detection system comprising an array of n high temperature superconductor sensors to detect nuclear quadrupole resonance signals, wherein n≧
2 and the bandwidth of each sensor is Δ
f, comprising;
a) determining r different frequencies that span the band of frequencies Δ
F when using sensors with bandwidths Δ
f, wherein r is of the order of Δ
F/Δ
f;
b) tuning the resonance frequencies of the n sensors to n different frequencies, wherein the n different frequencies are selected from the group of the r different frequencies, and maintaining the resonance frequencies of the n sensors for a selected period of time;
c) retuning the resonance frequencies of some or all of the n sensors to any of the r different frequencies that were not used in any previous step, wherein the n sensors have n different resonance frequencies, and maintaining the resonance frequencies of the n sensors for a selected period of time; and
d) repeating step (c) until all the r different frequencies have been used as resonance frequencies.
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Abstract
The methods of the invention for scanning a band of frequencies using a nuclear quadrupole resonance detection system with an array of high temperature superconductor sensors to detect nuclear quadrupole resonance signals improve the nuclear quadrupole resonance detection system performance.
105 Citations
21 Claims
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1. A method for scanning a band of frequencies Δ
- F with a nuclear quadrupole resonance detection system comprising an array of n high temperature superconductor sensors to detect nuclear quadrupole resonance signals, wherein n≧
2 and the bandwidth of each sensor is Δ
f, comprising;
a) determining r different frequencies that span the band of frequencies Δ
F when using sensors with bandwidths Δ
f, wherein r is of the order of Δ
F/Δ
f;
b) tuning the resonance frequencies of the n sensors to n different frequencies, wherein the n different frequencies are selected from the group of the r different frequencies, and maintaining the resonance frequencies of the n sensors for a selected period of time;
c) retuning the resonance frequencies of some or all of the n sensors to any of the r different frequencies that were not used in any previous step, wherein the n sensors have n different resonance frequencies, and maintaining the resonance frequencies of the n sensors for a selected period of time; and
d) repeating step (c) until all the r different frequencies have been used as resonance frequencies. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- F with a nuclear quadrupole resonance detection system comprising an array of n high temperature superconductor sensors to detect nuclear quadrupole resonance signals, wherein n≧
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8. A nuclear quadrupole resonance detection system for scanning a sample, comprising:
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a) n high temperature superconductor sensors, each with bandwidth Δ
f, to scan a band of frequencies Δ
F and detect any nuclear quadrupole resonance signal within the band of frequencies Δ
F, wherein n≧
2;
b) means to tune the resonance frequencies of the n sensors to n different frequencies, wherein the n different frequencies are selected from the group of r different frequencies that span the band of frequencies Δ
F using sensors with bandwidths Δ
f, and wherein r is of the order of Δ
F/Δ
f; and
c) means to simultaneously retune the resonance frequencies of the n sensors to n different frequencies that are not any of the r different frequencies used previously as resonance frequencies, and to continue to retune the n sensors in the same manner until all the r different frequencies have been used as resonance frequencies. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A nuclear quadrupole resonance detection system for scanning a sample, comprising:
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a) n high temperature superconductor sensors, each with bandwidth Δ
f, to scan a band of frequencies Δ
F and detect any nuclear quadrupole resonance signal within the band of frequencies Δ
F, wherein n≧
2; and
b) means to tune the resonance frequencies of each of the n sensors to r different frequencies, wherein the r different frequencies span the band of frequencies Δ
F using sensors with bandwidths Δ
f and wherein r is of the order of Δ
F/Δ
f. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification