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.
- Inventors:
-
- San Diego, CA
- Berkeley, CA
- Issue Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- OSTI Identifier:
- 868973
- Patent Number(s):
- 5254950
- Assignee:
- Regents, University of California (Oakland, CA)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- dc; superconducting; quantum; interference; device; usable; nuclear; quadrupole; resonance; zero; field; magnetic; spectrometers; spectrometer; measuring; spectra; zero-field; generated; sample; disclosed; amplifier; squid; operating; flux-locked; loop; generating; amplified; output; function; intensity; signal; circuit; integrator; means; preventing; driven; saturation; result; time; recover; excitation; pulses; reduced; dc squid; zero field; quantum interference; magnetic resonance; signal generated; nuclear magnetic; superconducting quantum; interference device; pulses generated; resonance spectra; excitation pulse; amplified output; quadrupole resonance; nuclear quadrupole; excitation pulses; dc superconducting; /324/
Citation Formats
Fan, Non Q, and Clarke, John. DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers. United States: N. p., 1993.
Web.
Fan, Non Q, & Clarke, John. DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers. United States.
Fan, Non Q, and Clarke, John. Fri .
"DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers". United States. https://www.osti.gov/servlets/purl/868973.
@article{osti_868973,
title = {DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers},
author = {Fan, Non Q and Clarke, John},
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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1993},
month = {Fri Jan 01 00:00:00 EST 1993}
}
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