核磁気共鳴測定装置

概要

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Apparatus are described for the observation of broad line shapes and for the pulsed technique measurements. For the field homogenization of large permanent magnet, each pole cap is separated one or two millimeters from the pole and parallelism of two pole caps is controled precisely by pushing or pulling it along the direction of the magnetic field. Derivatives of absorption line shapes are plotted at fixed frequency by a system incorporating a Robinson type regenerative oscillator, a narrow band amplifier, a recording potentiometer, and a control for varying the applied magnetic field linearly in time. The linear sweep control of magnetic field is transistorised. For the T_1 measurement in solid state, spin echo apparatus is coconstructed. Nuclear induction decay is observed on a synchroscope screen by a system incorporating a Schwartz type timing and pulse generator, a 30 MC pulsed oscillator triggered by double or multiple pulses, a modified symmetric bridge including antiparallel combination of silicon diodes, and a transient rf amplifier. Total dead time of the detector is about 14μ sec.
明治大学の論文