Topic/Type: 1. Plasma Simulation, Oral
M. Tzoufras1, A. R. Bell1, R. M. G. Trines2, P. A. Norreys2, F. S. Tsung3
1 University of Oxford (UK)
2 Rutherford Appleton Laboratory (UK)
3 UCLA (USA)
We report on our progress in developing a 3D parallel object-oriented Vlasov-Fokker-Planck code to study the physics of electron transport in the context of HiPER. The expansion of the electron distribution function to spherical harmonics is utilized  so as to reduce the size of the computational grid compared to standard VFP codes. The object-oriented design allows for interchangeability of numerical operators, thereby making it possible to incorporate a number of numerical methods and measure their performance in terms of speed, accuracy and stability. Parallelism is achieved by attaching a 'parallel class' to the code.
We present benchmarks for standard plasma physics problems with the most up-to-date version of the code. The types of physical problems for which the expansion to spherical harmonics yields the most/fewest benefits are discussed. It is shown that even for problems that attack the main weakness of our approach, i.e. the singularity at p=0, simulations can be performed stably and with very high accuracy.
 A. R. Bell et al., Plasma Phys. Control. Fusion 48 (2006) R37-R57.