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In this paper, 3D symmetric computation algorithm with finite element method for permanent magnet focusing system is presented. The algorithm is implemented in magnetic field simulator (MFS). The Comparisons of symmetric and full computation shows that symmetric computation can reduce the computational time and the computer memory effectively without decreasing the computational accuracy.
In this paper, a new approach to analysis the period of a permanent magnet focusing structure is presented. A series of simulations with different magnet field period is done with the microwave tube simulator suite (MTSS) [1]. The ratio of radial velocity and axial velocity with different magnet field period is compared.
Multistage depressed collector is the important part of the traveling wave tubes and the key component to improve efficiency. The design of multistage depressed collector is very difficult. But now it becomes viable and simple using the code EOS.
The Magnetic Focus Simulator (MFS) is a three-dimensional finite-element method code. It is used to model the magnetic field in the microwave tube and supplies the external magnetic field for the Electron Optics Simulator (EOS) and the Beam Wave Interaction Simulator (BWIS).
A nonlinear beam-wave interaction has be built to simulate the BWO in Helical traveling wave tube, which is in the above of 1D beam-wave interaction model by field theory, And taking into account of angular speed which are affected by magnetic fields. The CN with different QC has be compared to equivalent circuit in small signal, that the result is close. Also, the simulated results are accorded with...
Electron optics designer (EOS) (Tao Huang et al., 2007) is a fully three-dimensional (3D) finite- element (FE) steady- state trajectory code, which is a solver of electrostatic field and trajectory that takes into account secondary electron, space-charge effect and external magnetic field. To validate the code, this paper illustrated two typical experimental verifications of electron gun and collector.
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