MAGIC ANGLE PRECISION ADJUSTMENT COIL FOR SOLID-STATE NMR DEVICE, AND MAGIC ANGLE ADJUSTMENT METHOD USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a magic angle precision adjustment coil for electrically performing magic angle adjustment with an NMR device for measuring a solid sample at high resolution by means of the magic angle spinning method.SOLUTION: A magic angle precision adjustment coil is capable of highly accurately controlling an angle between a sample rotation axis and a combined static magnetic field by controlling current flow in order to generate the combined static magnetic field by combining an external static magnetic field Bo and a uniform variable magnetic field generated in a plane perpendicular to the external static magnetic field, and comprises a pair of arc-shaped conductive wires and a pair of straight conductive wires, where a diameter 2a of the arc-shaped conductive wire portion and a length 2L of the straight conductive wire portion are selected to satisfy a relationship expressed as: 1.91≤(length 2L/diameter 2a)≤2.15.SELECTED DRAWING: Figure 1