Honestly, I agree with @f-schmitt-zih that `result` is a non-descriptives name. We could also name it `file`...
Let's call the files `makroPerSupercell_TIME` and let us *not* create one folder per species but a hdf5-group per species in the same folder and file [see comment](https://github.com/ComputationalRadiationPhysics/picongpu/pull/163#issuecomment-33483170).