DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers

Patent · Thu Dec 31 19:00:00 EST 1992

OSTI ID:868973

Fan, Non Q ^[1]; Clarke, John ^[2]

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1. San Diego, CA
2. Berkeley, CA

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.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
• DOE Contract Number: AC03-76SF00098
• Assignee: Regents, University of California (Oakland, CA)
• Patent Number(s): US 5254950
• OSTI ID: 868973
• Country of Publication: United States
• Language: English

Related Subjects

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amplified
amplified output
amplifier
circuit
dc
dc squid
dc superconducting
device
disclosed
driven
excitation
excitation pulse
excitation pulses
field
flux-locked
function
generated
generating
integrator
intensity
interference
interference device
loop
magnetic
magnetic resonance
means
measuring
nuclear
nuclear magnetic
nuclear quadrupole
operating
output
preventing
pulses
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quadrupole
quadrupole resonance
quantum
quantum interference
recover
reduced
resonance
resonance spectra
result
sample
saturation
signal
signal generated
spectra
spectrometer
spectrometers
squid
superconducting
superconducting quantum
time
usable
zero
zero field
zero-field