Abstract
The problem of the pulsed magnetic field distribution in the cross section of the inductor core at the induction accelerator of electron beam is under consideration in this paper. Owing to multi-layer structure of the core package it has the magnetic and electric anisotropy with different speed of the field diffusion along the sheets of magnetic and across the sheets. At the pulse duration less than one microsecond the essential non-uniformity of the field along both axes of the core cross section can be found. This effect reduces the efficiency of the ferromagnetic material using with corresponding loss of the accelerator efficiency. The main conclusion of the paper consists of the necessity to check the field diffusion characteristics in the process of inductor design to be sure that the pulsed field is able to fill the cross section of the core during the pulse switching. The magnetic characteristics of the anisotropic core have been investigated in the paper by one-dimensional and two-dimensional simulation in the quasi-stationary approximation using the traditional equation of the field diffusion.
Highlights
Technology of the power electronic beams acceleration needs a generation of high electric fields
The core workability can be provided at this condition due to a strip structure applied at the core manufacturing [1]
Numerical analysis of the pulsed magnetic field diffusion into the cross section of the multi-layer core of inductor shows that the non-uniform distribution of induction as result of the finite speed of the field diffusion is a serious engineering problem which must be taken into consideration at the powerful electron accelerators design development. Both 1D and 2D approaches to the transient field simulation with equivalent anisotropic medium are productive for the study of diffusion specifics
Summary
Technology of the power electronic beams acceleration needs a generation of high electric fields. The most decisive results concerning of penetration of the pulsed field into the cross section of the inductor core can be obtained by way of 2D simulation in the standard finite-element software for the transient electromagnetic processes (for example, FemLab or Comsol). There are presented the pictures of the field excitation in the anisotropic core at the rectangular time-form of the exciting pulse at induction 1.5 T on the external border of the core cross section Both graphs have the lines of the field distribution drawn via time interval equal to. To relieve the study of the main peculiarities of electromagnetic process the number of sheets has been limited 25 and ratio of thickness has been taken equal to ains af Initial condition along the contour of the core cross section has been specified as. The own coefficient of the field diffusion for each kind of matter ( Df for ferromagnetic, Dins for insulator) has been entered into the model, with correlation
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