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Title: 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:
 [1];  [2]
  1. (San Diego, CA)
  2. (Berkeley, CA)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
OSTI Identifier:
868973
Patent Number(s):
US 5254950
Assignee:
Regents, University of California (Oakland, CA) LBNL
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 = {1993},
month = {1}
}

Patent:

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