Title :
An inverse-based multifrontal block ILU preconditioner for the 3D finite-element eigenvalue analysis of lossy SWSs
Author :
Hao Wang ; Li Xu ; JianQing Li ; Bin Li
Author_Institution :
Sch. of Phys. Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this paper, a novel inverse-based multifrontal block ILU preconditioner is proposed, which is derived from the complete multifrontal method and the inverse-based dropping strategy. The new preconditioner is used to solve the large-scale complex unsymmetric linear systems arising from the 3D finite element eigenvalue analysis of lossy slow-wave structures of traveling-wave tubes. In the simulations of many slow-wave structures, the 3D finite element eigenvalue analysis of lossy slow-wave structures based on this preconditioner has shown the high-efficiency computational performance and the low memory requirement. It is shown that this novel preconditioner is very useful to design the lossy slow-wave structures for high-efficiency traveling-wave tubes.
Keywords :
eigenvalues and eigenfunctions; finite element analysis; matrix decomposition; slow wave structures; 3D finite element eigenvalue analysis; complete multifrontal method; high-efficiency traveling-wave tubes; inverse-based dropping strategy; large-scale complex unsymmetric linear systems; lossy slow-wave structures; novel inverse-based multifrontal block ILU preconditioner; Eigenvalues and eigenfunctions; Electron tubes; Iron; Microwave theory and techniques; Random access memory; ILU; Slow-wave structure; finite element method; multifrontal method; traveling-wave tube;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2015 IEEE International
Print_ISBN :
978-1-4799-7109-1
DOI :
10.1109/IVEC.2015.7223944
