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Direct detection of low-frequency NMR using a dc SQUID (1986)

Friedman, L. J. ; Wennberg, A. K. M. ; Ytterboe, S. N. ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 57 (1986), S. 410-413

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ISSN: 1089-7623

Source: AIP Digital Archive

Topics: Physics , Electrical Engineering, Measurement and Control Technology

Notes: A system has been developed to directly observe NMR free induction signals at very low frequencies. We use a nonresonant pickup arrangement with a commercial dc SQUID to monitor the precessing magnetization in a 0.5–50-kHz range of Larmor frequencies. A relocking interval for the SQUID's flux locked loop presently sets our pulse recovery around 20–30 μs throughout this frequency range. The noise for this system is less than 1.5 times that recorded for the SQUID with shorted input terminals.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1138900

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