What is the safe way to find a region with most inhomogeneous magnetic field inside superconducting magnet of NMR spectrometer?

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Andrei Filippov

Thank you very much. I hope, it will help me.

Raivo Stern

Andrei Filippov : You are most likely addressing the case of a solution NMR, with a z-axis cylindrical probe and a saddle coil of the probe. Then, as Sergei Zhurenko explained, moving along the Z-coordinate and using the cryo-shimms afterwards sounds like a best idea. RT-shims will add the final value. For a solenoidal cross-coil turning the solenoid in xy plane might also be quite helpful...