Accelerator Frontier 4 MultiTe V Colliders AF 4

Accelerator Frontier 4 “Multi-Te. V Colliders” AF 4 Conveners Alexander Valishev (Fermilab) – valishev@fnal. gov Mark Palmer (BNL) – mpalmer@bnl. gov Nadia Pastrone (INFN/Torino) – pastrone@to. infn. it 5/27/2020 Snowmass AF 4 1

AF 4 “goal” Colliders that could operate in 1 -100 Te. V center-of-mass energy range: potential machine routes – R&D requirements – possible timelines Connections between the physics needs and accelerator types Detailed machine requirements to achieve the community's physics goals Exploration of the various types of colliders that may play a role at the energy frontier: Very high energy proton-proton machines Multi-Te. V electron-positron machines Muon colliders Other very high energy machine concepts (e. g. gamma-gamma, high energy electron-ion, others) Common issues at the very high energy scale such as energy efficiency and cost 5/27/2020 Snowmass AF 4 2

AF 4 Lo. Is Status and Plans • SUGGGESTED Lo. I on: – Machine concept – R&D needs to deliver a potential future capability – Connections of the technology to existing facilities (e. g. to provide potential facility construction and/or R&D pathways) • No Lo. I received so far • Established contact with some key players: – – – Cep. C CLIC FCC Gamma-Gamma ILC Muon Collider (MAP – LEMMA – CERN WG) • An email list was created: MULTITEV-SNOWMASS 21@fnal. gov 5/27/2020 Snowmass AF 4 3

AF 4 Meetings and Conferences • First planned townhall meeting to verify Lo. Is status: June 25 th, tentatively 10: 00 -13: 00 CDT (15: 00 -18: 00 UTC) • No conferences, meetings, etc planned yet AF 4 Liaisons and Po. Cs • Po. Cs to big projects/teams established • Partecipate to EF kick-off meeting May 21 st and follow-ups 5/27/2020 Snowmass AF 4 4