NMR-apparatus with an adjustable RF tuning circuit

Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system

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G01R 3308

Patent

active

046985956

ABSTRACT:
The invention relates to a drive mechanism for adjusting an element by means of which the resonance frequency in an NMR-apparatus can be varied. The mechanism comprises a coil which is exposed to the main magnetic field off the NMR-apparatus. The coil is connected to a current-pulse supply and is deflected out of its rest position by the current pulses. The reciprocating movement of the coil is converted by a stepping mechanism into a stepwise rotary or translational movement of the adjusting element which tunes or matches the RF coil to the RF generator.

REFERENCES:
patent: 1875329 (1932-09-01), Chireix
patent: 3447047 (1969-05-01), Lindsay
patent: 4312025 (1982-01-01), Boyer
patent: 4545384 (1985-10-01), Kawochi

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