Summary form only given. ICEPIC (Improved ConcurrentElectromagnetic Particle-In-Cell), developed by the Air Force ResearchLab, is a 3-D Particle-In-Cell (PIC) code that was designed to executeefficiently on parallel architectures using the MPI message passingstandard. Its primary application is to simulate collisionless plasmaphysics in high-power microwave devices. Recently, ICEPIC was extendedto include the functionality to simulate these devices in twodimensions. ICEPIC still remains a parallel code, but can now perform3-D as well as 2-D simulations without being recompiled. This allows theresearcher to perform quick initial simulations in two dimensions. Thefinal design can then be validated in three dimensions to include thethree-dimensional aspects of the device that could not be simulated witha two-dimensional PIC code. Comparisons of two-dimensional ICEPICcalculations to three-dimensional ICEPIC calculations were presented atICOPS99. Comparisons of two-dimensional ICEPIC calculations to othertwo-dimensional PIC codes will be presented this year
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