IMPROVED EXCITATION AND SENSING IN MDL TECHNIQUE

Mojmír Kollár – Evangelos Hristoforou

   Possibility to suppress the “cross-talk” from an excitation coil to a sensing (search) coil due to their proximity, while magnetizing a long (wire-like) samples, is discussed. It can be of interest especially on MDL where the voltage induced in a search coil is caused not only due to the elastic wave propagating along the line but also as a result of direct magnetic field-induced changes of the sample magnetization under the sensing coil caused by current pulse in the excitation coil.

Keywords: MDL, elastic waves, search and excitation coil, cross-talk, sensitivity of a coil, contra-winding

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