Optimization method and the associated solenoid coil wound continuously with a final correction function for generating a uniform magnetic field in the coil

摘要

Apparatus for generating a uniform magnetic field, and the present invention relates to the optimization process on the magnetic field in the sample chamber to provide a specification for the production of such devices. The apparatus includes a magnetic field at least one coil for generating a magnetic field winding of the field coil is wound around the sample chamber continuously winding diameter of the magnetic field coil, a partial region of the field coil at least and characterized in that it continuously changes along the longitudinal axis of the sample chamber. The correction of field inhomogeneity caused because the magnetic field coil is finite length, are dispersed throughout the field coil. Thus, the apparatus can be realized easily with high precision than with the correction coil is used to correct the non-uniformity in accordance with the prior art. Method for optimizing the magnetic field, using an objective function in combination rather than a series expansion of the magnetic field of the related art, a simulation of the magnetic field based on the optimization parameters. The objective function can be used in a range larger than the series expansion.