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TY - CPAPER AU - Nosych, A.A. AU - Iriso, U. AU - Olle, J. TI - Electrostatic Finite-element Code to Study Geometrical Nonlinear Effects of BPMs in 2D J2 - Proc. of International Beam Instrumentation Conference (IBIC2015), Melbourne, Australia, 13-17 September 2015 AB - We have developed a 2D finite element-based software for Matlab to study non-resonant effects in BPMs of arbitrary geometry, in particular the geometric nonlinearities. The developed code called BpmLab utilizes an open-source tetrahedral mesh generator DistMesh, combined with a short implementation of FEM with linear basis functions to find the electrostatic field distribution for boundary electric potential excitation. The BPM response as a function of beam position is calculated in a single simulation for all beam positions using the potential ratios, according to the Green's reciprocity theorem. The code offers ways to correct the geometrical nonlinear distortion, either by polynomials or by direct inversion of the electrode signals through numerical optimization. This work is an overview of the BpmLab capabilities to date, including its extensive benchmarking and validation against other methods PB - JACoW CY - Geneva, Switzerland SP - 418 EP - 422 KW - simulation KW - vacuum KW - storage-ring KW - software KW - target DA - 2016/01 PY - 2016 SN - 978-3-95450-176-2 DO - 10.18429/JACoW-IBIC2015-TUPB047 UR - http://accelconf.web.cern.ch/AccelConf/IBIC2015/papers/tupb047.pdf ER -