atomicPhysics: atomic Physics example for experimental FLYonPIC PIConGPU extension

was originally based on the Empty example by Axel Huebl

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Section author: Brian Marre <b.marre (at) hzdr.de>

This is a minimum spec-exmaple for testing the still experimental atomic physics branch of picongpu. It uses mostly default picongpu algorithms and settings, except for a few changes listed below, to reduce computation time.

• reduced super cell size, only 2x2x2 cells form a super cell

• reduced number of particels overall, only 1 macro-ion and 1 macro-electron per super cell

• no ionization, instead initialization in a somewhat correct charge state for initial conditions

Use this as a starting point for your own atomic physics picongpu simulations, but beware this is still experimental.