NMR Spectrometer and Method of Setting Up the Same

摘要

An NMR spectrometer and method in the following three steps are performed. (1) An external magnetic field is set to H0+DeltaH (where 4H>0). When the detection coil made of the superconducting material is still in a normal state, a magnetic field stronger than the ultimate target static magnetic field strength H0 by DeltaH is applied to the detection coil. (2) The detection coil made of the superconducting material is cooled down to T0 lower than its critical temperature Tc to bring the coil into a superconducting state while the external magnetic field H0+DeltaH is applied to the detection coil. (3) The external magnetic field is lowered from H0+DeltaH to H0 such that the applied external magnetic field is decreased by DeltaH while the detection coil is kept in the superconducting state.