FCC-ee MDI Civil Engineering update J. Osborne, J. Stanyard

Status of Civil Engineering Study Ongoing work: Working in collaboration with Integration to fix all dimensions for CDR Finalising alignment location Phase 3 of cost & schedule study with ILF Consulting engineers CDR writing has started Starting with FCC-hh FCC-ee amendments to the CDR will start before the end of 2017

Detector cavern LxWxH [m] Technical galleries [km]3) Dimensions Point Function LSS length [km] Depth [m] Detector shaft Ø [m] Access shaft Ø [m]1) Detector cavern LxWxH [m] Service cavern2) LxWxH [m] Technical galleries [km]3) A Main experiment 1.4 166 15; 10 18 66x35x35 1XXx25x15 ? B Side experiment; injection 123 12 66x30x35 C Mid-arc technical point - 130 XXx25x15 D Beam extraction 2.8 240 ± 1.4 E 79 F RF 558 ± 0.7 G 259 H Momentum collimation 230 I 193 J Betatron collimation 237 K 51 L 175

Alignment location

Specific FCC-ee enlargement

Specific FCC-ee enlargement Cross sec 1 Cross sec 2 Cross sec 3 Cross sec 4 Section 2 300m Section 3 200m Section 4 400m 700m 900m 1.1km Regular arc arc [m] interaction point FCC-ee enlargement 5100 4500 6500 Section 1 8000 17800 15300 10900 Data: K. Oide (FCC-ee), A. Langner (FCC-hh = FCC-ee booster) Enlargement steps: J. Stanyard, M. J. Stuart (preliminary)

Specific FCC-ee cross-sections Demineralized water Smoke extraction Cable trays Cable trays Leaky feeder Raw water/ firefighting Booster ring Electrical box Compressed air First aid equipment FCC-ee ring Fresh air duct Drain

Specific FCC-ee cross-sections

Specific FCC-ee cross-sections

Specific FCC-ee enlargement construction Two options for construction of enlargement: Excavate regular cross-section tunnel through to caverns and then enlarge with a roadheader. Stop the TBM excavation 1.1 km before cavern and excavate all of the enlargement with the roadheader. Currently appear to be similar in terms of cost and schedule.

Specific FCC-ee interaction region schematic