Digital Q-Meter for continuous-wave NMR
Abstract
A method to perform continuous-wave NMR measurements of nuclear magnetization at high magnetic fields, above 2.5 T, without analog down-mixing is described. An FPGA controls a digital clock pulse which is used to stimulate a resonant circuit and provide a reference signal. An algorithm determines the real portion of a resonant circuit signal near the Larmor frequency of the species of interest using only two measurements of the waveform per cycle. The FPGA automatically alters a variable capacitance to tune the resonant circuit to the Larmor frequency.
- Inventors:
- Issue Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 2222177
- Patent Number(s):
- 11726153
- Application Number:
- 16/903,766
- Assignee:
- Jefferson Science Associates, LLC (Newport News, VA)
- DOE Contract Number:
- AC05-06OR23177
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 06/17/2020
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Maxwell, James, Dong, Hai, Keith, Christopher, and Cuevas, Chris. Digital Q-Meter for continuous-wave NMR. United States: N. p., 2023.
Web.
Maxwell, James, Dong, Hai, Keith, Christopher, & Cuevas, Chris. Digital Q-Meter for continuous-wave NMR. United States.
Maxwell, James, Dong, Hai, Keith, Christopher, and Cuevas, Chris. Tue .
"Digital Q-Meter for continuous-wave NMR". United States. https://www.osti.gov/servlets/purl/2222177.
@article{osti_2222177,
title = {Digital Q-Meter for continuous-wave NMR},
author = {Maxwell, James and Dong, Hai and Keith, Christopher and Cuevas, Chris},
abstractNote = {A method to perform continuous-wave NMR measurements of nuclear magnetization at high magnetic fields, above 2.5 T, without analog down-mixing is described. An FPGA controls a digital clock pulse which is used to stimulate a resonant circuit and provide a reference signal. An algorithm determines the real portion of a resonant circuit signal near the Larmor frequency of the species of interest using only two measurements of the waveform per cycle. The FPGA automatically alters a variable capacitance to tune the resonant circuit to the Larmor frequency.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2023},
month = {8}
}
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Works referenced in this record:
Direct reading reactance meter
patent, July 1976
- Procter, Samuel Anderson; Younger, Robert Dewitt
- US Patent Document 3,970,925
Method of viewing nuclear magnetic resonance
patent, November 1978
- Mefed, Anatoly E.; Atsarkin, Vadim A.
- US Patent Document 4,124,813
Artificially structured unit cells providing localized B1 magnetic fields for MRI and NMR devices
patent, March 2018
- Driscoll, Tom; Smith, David R.; Urzhumov, Yaroslav A.
- US Patent Document 9,927,505