Development of the Q$=$10 Scenario for ITER on ASDEX Upgrade

The development of the baseline H-mode scenario foreseen for ITER on the ASDEX Upgrade tokamak, i.e. discharges at q$_{95}=$3, relatively low $\beta_{\mathrm{N}}$, high normalized density n/n$_{\mathrm{GW}}$ and high triangularity $\delta =$0.4, has been focused on the integration of elements foreseen for ITER and readily available on ASDEX Upgrade, such as ELM suppression with RMPs and pellets in combination with a metallic wall. Values for density and energy confinement came simultaneously close to the requirements of the ITER baseline scenario as long as $\beta _{\mathrm{N}}$ stayed above 2. However, it has been found that stationary discharges are not easily achieved under these conditions due to the low natural ELM frequency occurring at the low q$_{95}$ / high $\delta $ operational point. ELM parameters are not always controllable with the tools developed in other scenarios. We will point out the challenges and a possible route for a reliable Q$=$10 scenario on ITER as well as studies on alternative operational points at higher $\beta_{\mathrm{N}}$ and q$_{95}$, relying on the ``improved H-mode'' scenario and increased n/n$_{\mathrm{GW}}$.