In this paper we present an analytical method, employable with commercial full-wave electromagnetic CADs, which allows full-wave simulations of electromagnetically (EM) large structures, in terms of wavelength, such as linear accelerator cavities (LINACs) and a very accurate estimation of their operating frequency. The proposed technique is based on the exploitation of rotational symmetry through the definition of equivalent axially-symmetric volumes which replaces the non axially-symmetric ones inside the structure being analyzed. After a theoretical study, we show the successful application of the method in the real case study of a Drift Tube Linac (DTL) cell.
Giorgio Sebastiano Mauro,
Santi Concetto Pavone,
"Perturbative Approach for Fast and Accurate Evaluation of Quasi Axially-Symmetric Cavity Resonance Frequency in Drift Tube Linacs," Progress In Electromagnetics Research M,
Vol. 93, 109-118, 2020. doi:10.2528/PIERM20020702
1. Aloisio, M. and P. Waller, "Analysis of helical slow-wave structures for space TWTs using 3-D electromagnetic simulators," IEEE Trans. on Electron Devices, Vol. 52, No. 5, 749-754, 2005. doi:10.1109/TED.2005.845866
2. Di Paola, C., K. Zhao, S. Zhang, and G. F. Pedersen, "A novel lens antenna design based on a bed of nails metasurface for new generation mobile devices," The 14th European Conference on Antennas and Propagation European Conference on Antennas and Propagation, IEEE, 2020.
3. Pavone, S. C., E. Martini, M. Albani, S. Maci, C. Renard, and J. Chazelas, "A novel approach to low profile scanning antenna design using reconfigurable metasurfaces," 2014 International Radar Conference, 1-4, 2014.
5., , https://europeanspallationsource.se/accelerator/linac, online; accessed 2 February 2020.
6. Mauro, G. S., A. Palmieri, F. Grespan, G. Torrisi, O. Leonardi, L. Celona, G. Sorbello, and A. Pisent, "Analytical method, based on slater perturbation theorem, to control frequency error when representing cylindrical structures in 3D simulators," 2019 13th European Conference on Antennas and Propagation (EuCAP), 1-4, IEEE, 2019.
7. Li, Y.-J. and J.-M. Jin, "A new dual-primal domain decomposition approach for finite element simulation of 3-D large-scale electromagnetic problems," IEEE Trans. Antennas Propag., Vol. 55, No. 10, 2803-2810, 2007. doi:10.1109/TAP.2007.905954
8. Zhang, H.-X., L. Huang, L. Zhou, Z. Zhao, Y.-T. Zheng, G. Zhu, and W.-Y. Yin, "Massively parallel simulation of antenna array using domain decomposition method and a high-performance computing scheme," 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, 1251-1252, IEEE, 2019. doi:10.1109/APUSNCURSINRSM.2019.8888517
9. Oskooi, A. F., D. Roundy, M. Ibanescu, P. Bermel, J. D. Joannopoulos, and S. G. Johnson, "MEEP: A flexible free-software package for electromagnetic simulations by the FDTD method," Computer Physics Communications, Vol. 181, No. 3, 687-702, 2010. doi:10.1016/j.cpc.2009.11.008
10. Castorina, G., G. Torrisi, G. Sorbello, L. Celona, and A. Mostacci, "Conductor losses calculation in two-dimensional simulations of H-plane rectangular waveguides," J. of Electromagnet. Wave, Vol. 33, No. 8, 981-990, 2019. doi:10.1080/09205071.2019.1583136
11. Aloisio, M. and G. Sorbello, "One-third-of-pitch reduction technique for the analysis of ternary azimuthally periodic helical slow-wave structures," IEEE Trans. Electron Devices, Vol. 53, No. 6, 1467-1473, 2006. doi:10.1109/TED.2006.873846