DC superconducting quantum interference device usable in nuclear

Details DC superconducting quantum interference device usable in nuclear DC superconducting quantum interference device usable in nuclear

1991-09-13

1993-10-19

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

G01V 300

Patent

active

052549500

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.

REFERENCES:
patent: 4585999 (1986-04-01), Hilbert et al.
patent: 4638257 (1987-01-01), McDonald
patent: 4733182 (1988-03-01), Clarke et al.

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