Analysis of magnetic field distribution and mechanical vibration of magnetic field exciter under different voltage supply

The aim of the study performed in the Department of Biophysics of Nicolaus Copernicus University is to investigate the effect of extremely low frequency electromagnetic field (ELF-EMF) exposure on animal nervous system function. American cockroach (Periplaneta americana) serves as a model in experiments. Insects are placed into the chamber inside the coil (electromagnetic field exciter) designed and manufactured by,Elektronika i Elektromedycyna Sp. J.". Before starting the exposure it is necessary to determine: (1) what kind of field is applied, (2) the parameters of exposure and (3) the area of homogenous field. Only well established set-up characteristics can provide correct and comparable conditions of exposure to EMF. As well as, before starting the observation of the EMF influence on insects it is necessary to exclude factors which are associated with EMF exposure (such as temperature changes and vibrations) and could affect the organism function (behavior of animal). Especially cockroaches are very sensitive to vibrations and mechanical disturbances. Thermal conditions during the whole period of EMF exposure have been established earlier 1. The research that has been conducted by the authors so far included methodology of measurements of mechanical vibration spectrum and magnetic field distribution in interior part of electromagnetic field exciter on insects putted into research chamber. The vibration of electromagnetic field exciter occurs due to current flow by the exciter windings 2,3, and they acts on it in radial and longitudinal direction. In this paper the vibration and field distribution of field exciter measurements results are presented.