DESIGN OF MINIATURE COIL TO GENERATE UNIFORM MAGNETIC FIELD

In various technological and scientiflc applications, difierent types of coil systems are being used to produce uniform alternating magnetic fleld. The dimensions of these coil systems are considerably larger than the volume of interest. There is a necessity to reduce the dimension of the coil system without sacriflcing the extent of uniformity of the magnetic fleld. This problem has a wide audience and still remains as a topic of contemporary research in the development of miniaturized devices especially for calorimetric measurements of nano-particles, cancer therapy, and detection of minute surface defects by eddy current probes, etc. In this paper we present how we can modify the shape of a miniature solenoid to produce uniform magnetic fleld. A Genetic algorithm has been implemented to get the optimum dimension of the miniature solenoid. Our distinct shape design has achieved 97% uniformity for a 60% volume of interest.