Gyromagnetic resonance method and apparatus

Claim 1

CAVITY RESONATOR APPARATUS FOR USE IN A GYROMAGNETIC RESONANCE SPECTROMETER DEVICE EMPLOYING SWEEP COILS FOR MODULATING A STRONG MAGNETIC FIELD DIRECTED THROUGH THE CAVITY RESONATOR COMPRISING: A MAIN BODY STRUCTURE PROVIDING BOUNDARY SURFACES FORMING A CAVITY RESONATOR AND INCLUDING WALLS OF A MATERIAL WITH A HIGH RESISTIVITY ON THE SIDES OF THE CAVITY RESONATOR AT WHICH THE SWEEP COILS ARE POSITIONED, SAID MAIN BODY STRUCTURE PROVIDED WITH A COUPLING OPENING FOR DIRECTING MICROWAVE ENERGY INTO THE CAVITY RESONATOR, AT LEAST SAID BOUNDARY SURFACES OTHER THAN SAID WALLS OF HIGH RESISTIVITY MATERIAL BEING METALLIC AND ADAPTED FOR MOUNTING CAVITY RESONATOR ACCESSORY APPARATUS THEREON; A LAYER OF UP TO SEVERAL SKIN DEPTHS OF A DIAMAGNETIC MATERIAL WITH A LOW RESISTIVITY COVERING THE INTERIOR SURFACE OF SAID BOUNDARY SURFACES; SWEEP COILS POSITIONED ON SAID CAVITY RESONATOR APPARATUS WITH THE AXES OF SAID COILS SUBSTANTIALLY PERPENDICULAR TO SAID WALLS; AND MEANS FOR POSITIONING A SAMPLE OF MATTER WITHIN THE CAVITY RESONATOR WHEREBY CAVITY RESONATOR ACCESSORIES CAN BE MOUNTED ON AND MAKE ELECTRICAL CONTACT WITH AT LEAST SAID BOUNDARY SURFACES OTHER THAN SAID WALLS, SAID WALLS ARREST EDDY CURRENTS THEREIN DUE TO THE MODULATING MAGNETIC FIELD OF THE SWEEP COILS, AND SAID LAYER OF DIAMAGNETIC MATERIAL WITH A LOW RESISTIVITY PROVIDES THE CAVITY RESONATOR WITH A HIGH Q AND SHIELDS MICROWAVE MAGNETIC FIELDS CREATED WITHIN THE CAVITY RESONATOR FROM THE EFFECTS OF ANY MAGNETIC MATERIAL OTHER THAN A SAMPLE PLACED THEREWITHIN.