AN APPROACH FOR CHOOSING POSITIONING OF SMALL VOLUME SAMPLE AT INSTANTIATION PONDEROMOTIVE FARADAY METHOD IN DETERMINING ITS MAGNETIC SUSCEPTIBILITY

Abstract

The paper observes matter about identification of operating area at Faraday balance (area for positioning of test specimens with a small volume). This matter is given coverage to reference deficiently and it’s necessary to evaluate magnetic susceptibility values of specimens - based on purpose obtained coordinate characteristics of magnetic field induction between pole pieces of such balance. The paper shows that such identification may be quite effective when given characteristic (usually it is non-linear and doesn’t yield to desired linear even local approximation) is curly, i.e. has an inflection. It may possible making a linear approximation of rather shortly characteristic’s response region, i.e. establish a stable value induction gradient (according to accepted criterion sample poisoning). It also may possible getting visualized extremum view of gradient induction characteristic (in the vicinity of its gradient value are relatively stable).

Keywords

• faraday balance
• magnetic susceptibility
• specimen’s positioning area
• field density (induction) characteristic
• gradient extremum