Magnetic field stabilizer for NMR imaging systems with resistive magnets
作者:
J. Weis,
V. Jellu´sˇ,
I. Frollo,
期刊:
Review of Scientific Instruments
(AIP Available online 1987)
卷期:
Volume 58,
issue 12
页码: 2256-2259
ISSN:0034-6748
年代: 1987
DOI:10.1063/1.1139331
出版商: AIP
数据来源: AIP
摘要:
The NMR stabilizer has been constructed for the purpose of magnetic field stabilization. The error signal for field correction is derived from the1H resonance of pure H2O. A NMR transducer, operating in the pulse mode with time multiplexing, is connected to the transmit–receive radio frequency stage and yields information about the magnetic induction changes in the frequency form which is compared with the reference frequency. The frequency deviation is evaluated as a voltage that controls the power supply of the electromagnet coil. The stability achieved was slightly better than ±1 ppm.
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