FCCee Layout A new layout of the FCCee

FCC-ee Layout

• A new layout of the FCC-ee collider and booster has been proposed by V. Mertens as above. • The main booster sits right on the FCC-hh footprint. • The collider comes outside of the booster/FCC-hh by 1 m. • The collider optics has been modified to fit the new layout. • The shift of the ee's IP from the hh’s IP is increased by about 1 m to 10. 8 m. • The layouts in the straight sections are subject to change.

OLD

CENTER OF RING

Underground structure Elliptical shaft for magnet lowering (reserving 18 x 2. 5 m for magnets (incl. covers, handling margin)) Access gallery Service cavern 45 Technical gallery Machine tunnel Detector cavern (FCC-hh Lx. Wx. H = 66 x 30 x 35 m) 145 12 86 21/06/2017 30 Survey gallery fani. valchkova@cern. ch

FCC-ee enlargement [m] Data: K. Oide (FCC-ee), A. Langner (FCC-hh = FCC-ee booster) Enlargement steps: M. J. Stuart (preliminary) Section 2 Section 3 Section 4 Section 1 FCC-hh FCC-ee booster [m] e- FCC-ee e+ interaction point arc

FCC-ee cross section (regular arc) Smoke extraction Demineralized water Cable trays Leaky feeder Cable trays Raw water/ firefighting Booster ring Demineralized water filling Electrical box Compressed air First aid equipment FCC-ee ring Fresh air duct Drain

FCC-ee cross section Section 4 Tunnel profiles still to be agreed with

FCC-ee cross section Section 3

FCC-ee cross section 8000 Section 1 Φ 810