Sensor for a nuclear magnetic resonance device

A sensor for a nuclear magnetic resonance device for determining at least one material property of a material sample arranged in a useful volume comprising:

• a magnetic field generation apparatus having a planar magnet arrangement configured to generate a static magnetic field in the useful volume, wherein the planar magnet arrangement has a plurality of magnetic poles on a front side facing the useful volume, and wherein the magnetic poles are arranged adjacently to each other along a first extension direction of the planar magnet arrangement with a respectively alternating orientation;
• a measuring apparatus configured to measure a signal based on a nuclear magnetic resonance of the material sample arranged in the useful volume, the measuring apparatus including an electrical coil having at least one winding configured to generate an alternating magnetic field in the useful volume, wherein the at least one winding is arranged between two directly adjacent magnetic poles of the plurality of magnetic poles, such that the alternating magnetic field of the electrical coil is superimposed substantially orthogonally with the static magnetic field of the planar magnet arrangement in the entire useful volume;
• and
• an inner shielding structure of an electrically conductive material having a high magnetic permeability arranged between the electrical coil and the planar magnet arrangement, the inner shielding structure configured to shield the magnet segments from the alternating magnetic field of the electrical coil.

A sensor for a nuclear magnetic resonance device for determining at least one material property of a material sample arranged in a useful volume comprising:

• a magnetic field generation apparatus having a planar magnet arrangement configured to generate a static magnetic field in the useful volume, wherein the planar magnet arrangement has a plurality of magnetic poles on a front side facing the useful volume, and wherein the magnetic poles are arranged adjacently to each other along a first extension direction of the planar magnet arrangement with a respectively alternating orientation;
• a measuring apparatus configured to measure a signal based on a nuclear magnetic resonance of the material sample arranged in the useful volume, the measuring apparatus including an electrical coil having at least one winding configured to generate an alternating magnetic field in the useful volume, wherein the at least one winding is arranged between two directly adjacent magnetic poles of the plurality of magnetic poles, such that the alternating magnetic field of the electrical coil is superimposed substantially orthogonally with the static magnetic field of the planar magnet arrangement in the entire useful volume;
• and
• an outer shielding structure of an electrically conductive material having a high magnetic permeability arranged between the electrical coil and the useful volume, the outer shielding structure configured to shield the electrical coil from electromagnetic interference fields, and including
• a plurality of resonance structures, the plurality of resonance structures configured to shield, in a targeted manner, electromagnetic interference fields with frequencies in a region of a network frequency.