| 摘要 |
Methods and systems to control the temperature of a source of a fixed or permanent magnetic field used in Nuclear Magnetic Resonance (NMR) by sensing, measuring, or otherwise detecting the differences in the resonant or Larmor frequency, and based on the difference in the resonant or Larmor frequency, changing the temperature of the source of the fixed magnetic field. The temperature change can thus be based on the frequency change and the characteristics of the source (e.g., permanent and/or fixed magnet(s)), including the temperature coefficient of the source.
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