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In this paper the design and validation of a high performance simu- lation is discussed that is of critical value to the feasibil ity study of the GRAIL project, the aim of which is to build a gravitational radiati on antenna. Two rela- tively simple simulation models of this antenna are shown to be too restrictive for our purposes, necessitating the development of a simulation program that utilizes an explicit finite element kernel. The computational complexity of this simulation kernel requires the power that is offered by high performanc e computing method- ology. Therefore it is tailored for execution on parallel sy stems. Since it is devel- oped from scratch, we can circumvent notorious parallel programming pitfalls that usually are present in code migration. The simulation progr am is validated for its physical correctness as well as its performance gain. Perfo rmance results are pre- sented for two distributed memory parallel systems: A Parsytec PowerXplorer (32 PowerPC's) and Parsytec CC (40 PowerPC+'s).

High performance simulation for resonant-mass gravitational radiation antennas