| 摘要 |
PURPOSE:To correct the irregularity of a magnetic field generated at the bottom part of a sample tube by providing a magnetic field correcting coil to a probe which detects a signal. CONSTITUTION:A nuclear magnetic resonance device consists of a superconductive magnet 6 which produces a DC magnetic field, the magnetic field correcting coil 4 which corrects the uniformity of the DC magnetic field, a power source 5 for the magnetic field correcting coil, the nuclear magnetic resonance device probe 1 in which a detection coil is incorporated, the detection coil 2 which detects a signal, a probe magnetic field correcting coil 7, a sample to be measured, the sample tube, etc. The coil 4 is effective in improving the magnetic field uniformity of the coil 2 and the whole body, but less effective in improving the local magnetic field nonuniformity generated at the sample to be measured and the sample tube bottom part of the sample tube 3. Thus, the coil 7 is provided to obtain the effect of improvement of the local magnetic field nonuniformity generated at the sample bottom part and a spectrum of good quality is obtained with the minimum amount of the sample. |
