(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 .
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.
SNR as a function of the number of turns in pickup coils.
(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.
NMR signal detected from the conventional Faraday detection coil and the high- SQUID-based detector.
SNR as a function of the distance between the optical cell and SQUID.
Polarization as a function of time when the OP is engaged and the relaxation as a function of time when the OP is disengaged.
(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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