Speeding up predictive electromagnetic simulations for ITER application

•A general concept of engineering EM simulator for tokamak application is proposed.•An algorithm is based on influence functions and superposition principle.•The software works with extensive databases and offers parallel processing.•The simulator allows us to obtain the solution hundreds times faster. The paper presents an attempt to proceed to a general concept of software environment for fast and consistent multi-task simulation of EM transients (engineering simulator for tokamak applications). As an example, the ITER tokamak is taken to introduce a computational technique. The strategy exploits parallel processing with optimized simulation algorithms based on using of influence functions and superposition principle to take full advantage of parallelism. The software has been tested on a multi-core supercomputer. The results were compared with data obtained in TYPHOON computations. A discrepancy was found to be below 0.4%. The computation cost for the simulator is proportional to the number of observation points. An average computation time with the simulator is found to be by hundreds times less than the time required to solve numerically a relevant system of differential equations for known software tools.