期刊
JOURNAL OF MAGNETIC RESONANCE
卷 278, 期 -, 页码 134-140出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmr.2017.03.007
关键词
Spin oscillators; Frequency; Spin-exchange optical pumping
资金
- Natural Science Foundation of China [61671458, 61571018, 61531003]
- Research Project of National University of Defense Technology [JC140702]
The nuclear spin precesses continually when a positive feedback nuclear magnetic resonance field is applied. The characteristics of this behaviour depend not only on the parameters of the spin ensemble but also on the type and parameters of the feedback loop. We theoretically analysed two types of feedback loops which use direct feedback and phase-lock feedback, respectively. We also compared the oscillating frequency of the spin oscillators using rotating and linear magnetic fields, respectively. Some interesting results on the frequency and start-time of the oscillator were found. These findings will be useful to improve the accuracy of fundamental physical theory tests, such as the Lorentz-violation and electron dipole moment (EDM) test, using spin oscillators. And moreover, they are also very useful for achieving a high performance NMR gyroscope. (C) 2017 Elsevier Inc. All rights reserved.
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