A method for influencing of the homogeneous static magnetic field in an nmr - apparatus and associated nmr - resonator

摘要

A method for influencing the homogeneous static magnetic field b φ 0 φ in the direction of a z - axis in a nmr - apparatus, and disturbances occur, caused by superconducting components of the hf - coils for the reception of nmr - signals of a sample in a measuring volume of the nmr - apparatus are caused, wherein the superconducting components of the hf - coils the hf - active region of the sample in the z - the direction is transmitted, and wherein the disturbances in the z - component of the b φ 0 φ - field in the hf - active region of the sample, is characterized in that the superconducting components of the hf - coils an additional magnetic field which is so strong that in the course of the use of all in the vicinity of the hf - active region of the sample superconducting structures arranged in the superconducting components of the hf - coils maximum is to be magnetized and thus their with respect to b φ 0 φ transverse magnetization along the z - axis a substantially constant, and which is different from zero value. The invention also relates to an nmr - resonator with at least one hf - coil, wherein superconductive conductor structures of the nmr - resonator in the radial distance from the measuring sample are arranged, and wherein the superconductive conductor structures the hf - active part of the measuring sample in z - the direction of the project beyond, which is characterized in that the superconductive conductor structures according to an application of an additional magnetic field, all of the superconductive conductor structures maximum ..