Fig. 1
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40623-015-0294-z/MediaObjects/40623_2015_294_Fig1_HTML.gif)
Schematic diagram of the measurement system. A pulse from the field-sense coil triggers to acquire the signal from the coaxial pick-up coils through the analog circuit comprising a preamplifier and integrator
Schematic diagram of the measurement system. A pulse from the field-sense coil triggers to acquire the signal from the coaxial pick-up coils through the analog circuit comprising a preamplifier and integrator