Title :
Improved symmetries in the finite-element gun code MICHELLE
Author :
Nelson, Eric M. ; Petillo, John J. ; Levush, Baruch
Author_Institution :
Los Alamos Nat. Lab., Los Alamos, NM, USA
Abstract :
We have improved the finite-element gun code MICHELLE´s handling of symmetry planes and periodicities. A general-purpose vertex vector field symmetrization algorithm ensures that gun simulations that track particles with smoothed electric fields are consistent between full and symmetry-reduced models. The smoothed fields in a symmetry-reduced model are now more accurate on symmetry planes and periodic boundaries, and likewise on the axis of axisymmetric models. We describe the algorithm and present simulations that demonstrate these improvements.
Keywords :
electron guns; finite element analysis; vertex functions; MICHELLE; axisymmetric model axis; finite-element gun code; general-purpose vertex vector field symmetrization algorithm; smoothed electric fields; symmetry planes handling; symmetry-reduced models; Displays; Electric potential; Finite element methods; Geometry; Guns; Laboratories; Magnetic fields; Particle tracking; Smoothing methods; Solid modeling; MICHELLE; finite-element gun code; periodicities; symmetry planes;
Conference_Titel :
Vacuum Electronics Conference, 2009. IVEC '09. IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-3500-5
Electronic_ISBN :
978-1-4244-3501-2
DOI :
10.1109/IVELEC.2009.5193442
