| Citation: | Peng XIE, Li XU, Junhui YIN, Zhonghai YANG, Bin LI. Application of Finite Element-Based Domain Decomposition Method to the Simulation for Permanent Magnet Focusing System[J]. Journal of Electronics & Information Technology, 2021, 43(2): 488-494. doi: 10.11999/JEIT190706
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With the development of computer technology and parallel solving technology, domain decomposition method has been increasingly applied to various fields of computational electromagnetics. For the simulation of microwave tube permanent magnet focusing system, this paper proposes a finite element-based non-overlapping domain decomposition method, and introduces a novel transmission condition. Then the interior penalty formulation is used to derive the finite element weak form. The biggest advantage of the proposed domain decomposition method is that no extra unknowns are introduced, and the final finite element matrix is symmetric and positive definite, which makes the matrix equation suitable be solved by the preconditioned conjugate gradient method. In this paper, several microwave tube permanent magnet focusing systems are simulated and compared with the commercial software Maxwell in detail. The results show that the proposed domain decomposition method has the same accuracy as Maxwell, but has a more superior computational performance.
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