The spectrometers can in principle cover 0.5 to 1000 MHz. Specific probes at ultra-low temperatures are developed for each experiment’s specific needs. Two superheterodyne computer interfaced pulsed NMR spectrometers designed by (1) H. Akimoto with D. Candela and (2) N. Sullivan with L. Phelps are available for broadband applications. The spectrometers can in principal cover 0.5 to 1000 MHz. Specific probes at ultra-low temperatures are developed for each experiment’s specific needs.
Instrumentation
- Gated RF power amplifiers are used for the RF pulse transmission to reduce noise and heating.
Images & Sample Data
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NMR echo amplitudes
NMR echo amplitudes
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Nested coil design for low frequencies
Nested coil design for low frequencies
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Nested coil design for low frequencies
Nested coil design for low frequencies
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Nested coil design for low frequencies
Nested coil design for low frequencies
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NMR Relaxation times
NMR Relaxation times
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Re-entrant resonant cavity
Re-entrant resonant cavity
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Spin diffusion
Spin diffusion
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Related Publications
Huan, C., et al, NMR Studies of 3He Droplets in Dilute 3He- 4He Solid Solutions, J. Low Temp. Phys., 162, 167-173 (2011) Read online
C. Huan, et al. A Novel Design of a Low Temperature Pre-amplifier for Pulsed NMR Experiments of Dilute 3He in Solid 4He, (2010) J. Low Temp. Phys. (2010) Read online
Akimoto, H., et al, New Evidence for Zero-Temperature Relaxation in Spin-Polarized Fermi Liquid, Phys. Rev. Lett., 90, 105301-105304 (2003). Read online
Akimoto, H., et al, Spin Transport in Very Dilute 3He -4He at Very High B/T, J. Low Temp. Phys., 126, 109 (2002) Read online
H. Akimoto, et al. A Small Birdcage Resonator for Low Temperature NMR Experiments, J. Low Temp. Phys. (2000) Read online