Verification of the control zone of a magnetometer using dispersed ferrosondes

   Objectives. Using the developed magnetic force meter using different samples of dispersed material as a ferrosonde, the work set out to determine possible changes in the location of the measuring zone in a magnetometer. Dispersed (in particular, powdered) materials having magnetically active properties are used in solving a wide variety of applied and scientific problems. However, the task of fine-tuning the magnetometer device (usually of the ponderomotive type) remains relevant. In particular, the identification of the executive zone intended for the location of the studied sample necessarily involves the study of their magnetic properties.

   Methods. For direct measurements of the magnetic force, the engineered method was used by forcibly moving (between the poles-hemispheres of the magnetometer) a spherical ferrosonde in the form of a powder medium.

   Results. A series of experiments were conducted using the designed magnetic force meter (at different values of the magnetometer’ magnetizing force) using four types of powders (based on iron and nickel) as ferrosondes. The magnetometer comprises a system having poles of diameter 184 mm located at a distance of 28 mm from each other. The establishment of coordinate characteristics (extreme in appearance) of this force made it possible to identify the executive zone of the magnetometer in its “chink” region between the fields. A series of similar experiments were carried out using a defectography powder and a powder of ferroparticles extracted from tea. The analysis of the obtained experimental data is performed.

   Conclusions. A special meter was designed for carrying out direct measurements of the magnetic force in the inhomogeneous field of a magnetometer device having hemispherical poles. The extreme type of the coordinate characteristics of the magnetic force was confirmed using model powder media (based on iron and nickel). This solves the urgent problem of identifying the executive zone intended for dislocation of a dispersed sample when studying its magnetic properties. A series of similar experiments using samples of magnetically active powder for flaw detection and powder with
ferro-impurities, which were extracted earlier from tea, were carried out to verify the position of the executive zone.

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