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Low frequency NMR polarimeter for hyperpolarized gases
1Department of Physics, Washington University, St. Louis, Missouri, 63130-4899, USA.
Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|September 19, 1998
Summary
This study introduces an affordable pulsed Nuclear Magnetic Resonance (NMR) system for monitoring rare gas nuclei polarization. The device is ideal for tracking spin polarization during laser polarization and storage/transport.
Area of Science:
- Physics
- Chemistry
- Engineering
Background:
- Pulsed Nuclear Magnetic Resonance (NMR) is crucial for studying nuclear spin polarization.
- Monitoring spin polarization of rare gas nuclei is essential in laser-polarization apparatus.
- Existing methods may lack cost-effectiveness or self-containment for specific applications.
Purpose of the Study:
- To describe an inexpensive and self-contained apparatus for pulsed NMR.
- To enable monitoring of rare gas nuclei spin polarization in laser-polarizing apparatus.
- To facilitate tracking of polarization decay during storage and transport.
Main Methods:
- Development of a pulsed NMR apparatus operating at 30-250 kHz.
- Integration of a flexible pulse generator and RF gate for transmitter RF cycle splitting.
- Inclusion of a Q switch and a wide range of receiver gains for signal optimization.
Main Results:
- The apparatus is demonstrated to be inexpensive and self-contained.
- It effectively monitors spin polarization of rare gas nuclei in low magnetic fields (approx. 30 G).
- The system allows convenient observation of polarization decay over time.
Conclusions:
- The described pulsed NMR apparatus offers a cost-effective solution for monitoring rare gas nuclei polarization.
- Its design is suitable for applications involving laser polarization and subsequent storage/transport.
- The device simplifies the study of spin polarization dynamics in rare gas systems.