An Estimate of the Signal-to-Noise Ratio in Nuclear Magnetic Resonance Measurements at Ultra-Low Temperatures
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概要
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The signal-to-noise ratios for nuclear magnetic resonance (NMR) measurements by the Continuous Wave (CW) and the Pulsed NMR techniques are compared for applications at ultra-low temperatures. This comparison is made at 0.1, 1 and 10 mK as a function of the energy dissipation. The resonance signal is to be detected by a conventional method using a receiver r-f coil or by using a SQUID detector and the relative merits of the two detection methods are discussed for both the CW and the Pulse techniques. For the CW NMR, the SQUID detection method is found to have an advantage over the conventional method except at a relatively high applied DC field. For the pulsed NMR, the SQUID detection results in a better signal-to-noise ratio for a relatively high r-f field, (short pulses) while the conventional method becomes more advantageous with a decreasing r-f field.
- 社団法人応用物理学会の論文
- 1980-05-05
著者
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Ikushima Akira
The Institute For Solid State Physics The University Of Tokyo
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Fujii Itsuhiro
The Institute For Solid State Physics The University Of Tokyo
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YOSHIDA Yoshitaka
The Institute for Solid State Physics, The University of Tokyo
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Yoshida Yoshitaka
The Institute For Solid State Physics The University Of Tokyo
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