Several malfunctions and measurements errors were observed in a NMR spectrometer operating near a magnetic confinement fusion experiment in Padua, Italy. A detailed study of the interference mechanism revealed that such type of spectrometers are extremely sensitive to external varying fields, if their frequency is in the range between 0.1 and 3 Hz. Pulsed fusion devices emit stray fields in this range of frequencies. Several approaches, including an active shield, were explored to mitigate the effects of this peculiar type of interference.
Susceptibility of NMR instrumentation to ELF fields
CHITARIN, GIUSEPPE;
2005
Abstract
Several malfunctions and measurements errors were observed in a NMR spectrometer operating near a magnetic confinement fusion experiment in Padua, Italy. A detailed study of the interference mechanism revealed that such type of spectrometers are extremely sensitive to external varying fields, if their frequency is in the range between 0.1 and 3 Hz. Pulsed fusion devices emit stray fields in this range of frequencies. Several approaches, including an active shield, were explored to mitigate the effects of this peculiar type of interference.File in questo prodotto:
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