Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1991-04-05
1992-11-10
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324314, G01R 3320
Patent
active
051627396
ABSTRACT:
A double-tuned NMR sample excitation coil has a first end connected through a first balancing inductor to ground and a second end connected through a second balancing inductor to a low-frequency (LF) capacitor tuning and matching network. Two two balancing inductors have inductance less than 50% but greater than 10% that of the excitation coil. Each balancing coil is tuned by a capacitor network to an independent resonant frequency when disconnected from the sample coil that is less than 95% but greater than 60% of the final high frequency (HF) resonance. Moreover, both such independent resonant frequencies are equal within 10%. Broadband operation is possible under a variety of temperatures and the circuit works with high-speed sample spinners.
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Doty F. David
Mah Raymond Y.
Tokar Michael J.
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