DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers
Abstract
A spectrometer for measuring the nuclear quadrupole resonance spectra or the zero-field nuclear magnetic resonance spectra generated by a sample is disclosed. The spectrometer uses an amplifier having a dc SQUID operating in a flux-locked loop for generating an amplified output as a function of the intensity of the signal generated by the sample. The flux-locked loop circuit includes an integrator. The amplifier also includes means for preventing the integrator from being driven into saturation. As a result, the time for the flux-locked loop to recover from the excitation pulses generated by the spectrometer is reduced. 7 figures.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 5299940
- Patent Number(s):
- 5254950
- Application Number:
- PPN: US 7-759997
- Assignee:
- Univ. of California, Oakland, CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 13 Sep 1991
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; NMR SPECTROMETERS; DESIGN; AMPLIFIERS; NMR SPECTRA; SQUID DEVICES; ELECTRONIC EQUIPMENT; EQUIPMENT; FLUXMETERS; MEASURING INSTRUMENTS; MICROWAVE EQUIPMENT; SPECTRA; SPECTROMETERS; SUPERCONDUCTING DEVICES; 440800* - Miscellaneous Instrumentation- (1990-); 665412 - Superconducting Devices- (1992-)
Citation Formats
Fan, N Q, and Clarke, J. DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers. United States: N. p., 1993.
Web.
Fan, N Q, & Clarke, J. DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers. United States.
Fan, N Q, and Clarke, J. Tue .
"DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers". United States.
@article{osti_5299940,
title = {DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers},
author = {Fan, N Q and Clarke, J},
abstractNote = {A spectrometer for measuring the nuclear quadrupole resonance spectra or the zero-field nuclear magnetic resonance spectra generated by a sample is disclosed. The spectrometer uses an amplifier having a dc SQUID operating in a flux-locked loop for generating an amplified output as a function of the intensity of the signal generated by the sample. The flux-locked loop circuit includes an integrator. The amplifier also includes means for preventing the integrator from being driven into saturation. As a result, the time for the flux-locked loop to recover from the excitation pulses generated by the spectrometer is reduced. 7 figures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 19 00:00:00 EDT 1993},
month = {Tue Oct 19 00:00:00 EDT 1993}
}
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