NMR CryoMAS probe for high-field wide-bore magnets

Details NMR CryoMAS probe for high-field wide-bore magnets NMR CryoMAS probe for high-field wide-bore magnets

2007-10-16

2007-10-16

Shrivastav, Brij (Department: 2859)

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

Reexamination Certificate

active

11275933

ABSTRACT:
“An MAS probe is disclosed for obtaining a substantial improvement in signal to noise (S/N) in triple-resonance high-resolution (HR) magic-angle-spinning (MAS) NMR of samples near room temperature (RT) in high-field magnets where the magnet's RT shim bore is greater than 60 mm. All critical circuit components, including the sample coils, are located along with the spinner assembly in a thermally insulated cold zone pressurized with helium gas. The spinner assembly attaches to a sealed, curved, rotor-loading tube to permit automatic sample change, and it is surrounded by a partially insulated jacket cooled with a cryogenic fluid, generally nitrogen gas. The MAS probe is also compatible with magic angle gradients, variable temperature operation, field locking, and commonly available closed-cycle cold fingers.”

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