The CCC computer code solves (anti)electron or photon scattering on quasi one- or two-electron targets. The close-coupling equations are formed by expanding the total wave-function of the system in a truncated complete Laguerre basis, which are solved in momentum space as coupled linear equations. Convergence is obtained by simply increasing the basis size. It is written in Fortran using a hybrid MPI/OpenMP/GPU parallelism, and implemented for multi-node HPC systems. An example of scaling on computers at Australia's National Computing Infrastructure and the Pawsey Supercomputer Centre is below

Examples of input files for the following collision problems:

- 54.4 eV e
^{-}-H scattering ccc.in

If you have any related questions or suggestions, email me at *I.Bray@curtin.edu.au*