De Villiers, J.G. Broodryk, J.I. Conradie, J.L. Nemulodi, F. Thomae, R.W. Yang, J.J. Zhang, T.J. JACoW Geneva, Switzerland 978-3-95450-167-0 10.18429/JACoW-Cyclotrons2016-MOP10 English 71-74 MOP10 cyclotron acceleration extraction injection emittance Contribution to a conference proceedings 2017 2017-01 http://dx.doi.org/10.18429/JACoW-Cyclotrons2016-MOP10 http://jacow.org/cyclotrons2016/papers/mop10.pdf The RF and magnetic fields of the injector cyclotron (SPC2) were modelled in 3D with finite element methods, using OPERA-3d, in an effort to determine the cause of the relative poor beam transmission through the machine in the 8-turn mode. Simulation of the particle motion in SPC2 was done using machine operational parameters for acceleration of 20Ne³⁺. The isochronous magnetic field is calculated from a complete cyclotron magnet model and the electrostatic field distribution from a dee electrode model, using TOSCA. The modelling of the high frequency resonance conditions of the resonators with SOPRANO-EV provided the relative variation of the electric field profiles in the acceleration gaps. A command line program was developed to combine the information of the three models and implement time-dependent control of the electrostatic fields during the particle tracking. In addition, based on calculated data from OPERA-3D, the parallel particle-in-cell code OPAL-CYCL was used to calculate a particle orbit for comparison with OPERA-3d. The models, methods and calculated results will be presented.