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Enhancement in low field nuclear magnetic resonance with a high- superconducting quantum interference device and hyperpolarized
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10.1063/1.2982092
/content/aip/journal/jap/104/6/10.1063/1.2982092
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/6/10.1063/1.2982092
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Schematics of the conventional Faraday detection, the OP, and the high- SQUID-based NMR spectrometer in a system. (b) The NMR signal from the optical cell is inductively coupled to the SQUID through a flux transformer, in which inductors (input coil and pickup coil) and capacitor , which were tuned to the resonant frequency of .

Image of FIG. 2.
FIG. 2.

Pulsed sequences used to detect the NMR signal for hyperpolarized : (a) measuring field, (b) the pulse, (c) the NMR signal, and (d) the fast Fourier transformation of NMR signal.

Image of FIG. 3.
FIG. 3.

SNR as a function of the number of turns in pickup coils.

Image of FIG. 4.
FIG. 4.

(a) The FID NMR signal of the optically pumped cell. (b) The fast Fourier transformation of the NMR signal with a bandwidth of 3 Hz. The expanded plot of the NMR from 0.2 to 0.201 s is shown in the inset. (c) In a measuring field of 0.239 mT the linewidth in the NMR spectrum is 0.8 Hz.

Image of FIG. 5.
FIG. 5.

NMR signal detected from the conventional Faraday detection coil and the high- SQUID-based detector.

Image of FIG. 6.
FIG. 6.

SNR as a function of the distance between the optical cell and SQUID.

Image of FIG. 7.
FIG. 7.

Polarization as a function of time when the OP is engaged and the relaxation as a function of time when the OP is disengaged.

Image of FIG. 8.
FIG. 8.

(a) The back-projection image and (b) filtered back-projection image of a cylindrical optical cell measured in a field of 0.1128 mT and a gradient field of .

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/content/aip/journal/jap/104/6/10.1063/1.2982092
2008-09-26
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Enhancement in low field nuclear magnetic resonance with a high-Tc superconducting quantum interference device and hyperpolarized H3e
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/6/10.1063/1.2982092
10.1063/1.2982092
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