SPS Operation and Future Proton Sharing Scenarios for the ECN3 facility

In the framework of the Physics Beyond Colliders (PBC) study, a future high intensity facility at the existing ECN3 experimental hall of the North Area (NA) complex is under study. A task force is investigating ECN3 intensity upgrade scenarios concerning beam delivery and related infrastructure, considering solutions compatible with consolidation plans and post-LS3 experimental scenarios. As input to this study group, the sharing scenarios for the amount of protons on target (PoT) delivered to such a future high intensity fixed-target facility and the existing North Area experiments are presented in this report. Based on demonstrated Super Proton Synchrotron (SPS) performance for CERN Neutrinos to Gran Sasso (CNGS) and the recent SPS performance for fixed target beams following the successful completion of the LHC Injectors Upgrade (LIU) project, the expected proton sharing between the TCC2 targets and ECN3 is estimated. AWAKE and HiRadMat are taken into account in the future supercycle composition while the maximum possible power dissipation of the SPS magnets is respected. In the note it is also assumed that measures will be taken to address beam loss and activation at extraction and transfer compatibly with the transmission efficiency presented here. Finally, also considerations on power consumption are made for the different operational scenarios.