Title :
SUPERFISH accuracy dependence on mesh size
Author :
Merson, J.L. ; Boicourt, G.P.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
Abstract :
The RF cavity code SUPERFISH is extensively used for the design of drift-tube linac (DTL), radio-frequency quadrupole (RFQ), and coupled-cavity linac (CCL) structures. It has been known for some time that considerably finer meshes are required near the nose of a drift tube to ensure accurate calculation of the resonant frequency and related secondary quantities. The authors discuss the results of numerical experiments designed to provide rules to set proper mesh sizes for DTL, RFQ, and CCL problems. During this work, SUPERFISH problems involving more than 100000 mesh points were solved. The RFQ was much more sensitive to large mesh spacing than the cells. Power dissipation and stored energy results show this most strikingly
Keywords :
beam handling equipment; beam handling techniques; linear accelerators; physics computing; RF cavity code; SUPERFISH accuracy dependence; coupled-cavity linac; drift-tube linac; mesh size; numerical experiments; radio-frequency quadrupole; resonant frequency; stored energy; Computational geometry; Guidelines; Laboratories; Linear particle accelerator; Mesh generation; Nose; Power dissipation; Radio frequency; Reflection; Resonant frequency;
Conference_Titel :
Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE
Conference_Location :
Chicago, IL
DOI :
10.1109/PAC.1989.73116
