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Nanofibers can be prepared from a polymer solution utilizing electrospinning, a method exploiting an electrostatic field. In this work the electric field of the electrospinning process was modeled for better understanding and controllability of the fiber deposition in the electrospinning process. The model of the electric field was compared with experimental observations. The model of the electric field explained many phenomena in electrospinning, but did not provide an exclusive control tool for the process. POLYM. ENG. SCI., 47:2065–2074, 2007. © 2007 Society of Plastics Engineers

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A b s h a c M new generation of Hall sensor magnetometer for non-destructive studies of superconductor homogeneity is proposed and tested. The magnetometer allows us to measure the threedimensional spatial dependence of all three components of magnetic field produced by applied or induced currents in the conductor. This new technique is more sensitive to detect small obstacles in the current path than the old Hall sensor techniques measuring only the field component perpendicular to the flat surface of the conductor. Havingpresented themeasurement system, the method Is demonstrated by experiments on multifilamentary BSCCO tapes.