Simulation challenges for the community in complex LPA designs at the example of hybrid LWFA - PWFA

Increasingly complex experimental LPA designs, such as current hybrid LWFA-PWFA experiments integrate different physics regimes (LPA, e- beam tracking, gas dynamics, etc...) require simulations at multiple scales (more physics, more data). Working in mixed teams of experimentalists and theoreticians with specialists from different affiliations requires tighter interfacing of different codes with experimental data analysis.

Key challenges for laser-plasma accelerator simulations are
* Predictive start-to-end simulations, while retaining the ability to understand and optimize sub-systems.
* Common interfacing standards (OpenPMD -- exchange particle and mesh based data from scientific simulations and experiments)
* Tolerance analysis (Analyse the impact of variations in initial conditions and accelerator design).
* Synthetic Diagnostics (Experimental diagnostics modeled in-situ at simulation time)
* Simulation as-a-service (Within some predefined range of simulation scenarios, running additional simulation for some LPA design is made easy for non-specialists.)