1. Outcome of the FCC Week 2015 Input for work program in the second year of the study Ph. Lebrun FCC Infrastructure & Operation Meeting 22 April 2015

2. FCC Week 2015 Ph. LebrunFCC I&O meeting 1504222 http://indico.cern.ch/event/340703/timetable/#20150322

3. Parallel sessions “Infrastructure & Operation” Thursday 26 March 2015, 8h30-15h00 Ph. LebrunFCC I&O meeting 1504223 TITLESPEAKER Implantation, Operation, PowerChair: Lluis Miralles Verge, CERN Civil engineering and geologyJohn Osborne, CERN Transport and handling considerationsIngo Ruehl, CERN A key attribute of a Future Circular Collider: availability performance (RAMS)Peter Sollander, CERN Energy and power estimatesRende Steerenberg, CERN CryogenicsChair: Christoph Haberstroh, TU Dresden Overview of FCC cryogenicsLaurent Tavian, CERN Large-capacity helium refrigeration: from state-of-the-art towards FCC reference solutionsFrançois Millet, CEA Grenoble Cryogenic refrigeration with Ne-He mixtures: roadmap and first results of TU Dresden studySteffen Klöppel, TU Dresden Cooling the FCC beam screensLaurent Tavian, CERN Controls & SafetyChair: Ralf Trant, CERN Control concepts for future circular accelerators: why it is not to early to speak about themPhilippe Gayet, CERN Lessons learnt and new concepts for conventional safety in FCCAndre Henriques, CERN Optimised civil engineering layout for radiation protection in FCCMarkus Widorski, CERN DiscussionNA http://indico.cern.ch/event/340703/timetable/#20150326.detailed

4. Accelerator design roadmap “Waterfall” vs “concurrent” engineering Ph. LebrunFCC I&O meeting 1504224 Accelerator physics Accelerator physics Accelerator technology Accelerator technology Infrastructure Cost & Schedule Environmental impact Safety Power & Energy Performance targets Reliability & availability

5. Geology & Civil Engineering Environmental impact –Options for removal and disposal of 10 Mm 3 of spoil –Radiation protection: risk of activation of groundwater & geothermal boreholes –Crossing Lake Geneva: impact of shallow tunnel solution vs. deep tunnel solution Conceptual design and engineering limits –Shafts: construction methods and limitations, shaft vs ramp –Caverns: consolidate options, conceptual design, investigate limitations for depth & span –Tunnels: rock squeezing, depth limits –Design criteria for experimental areas (underground caverns and surface buildings), functional analysis and conceptual design –Design criteria for technical areas (underground caverns and surface buildings), functional analysis and conceptual design Optimisation –Use tunnelling metrics created by the engineering consultant Amberg to compare risk/cost of the tunnel circumferences and locations under study –Finalise data and functionality of TOT –Genetic algorithm to locate the optimal position of the FCC tunnel –Optimization algorithms (maximum gradient and/or genetic) to optimize tunnel position Ph. LebrunFCC I&O meeting 1504225

6. Cryogenics Heat loads –Estimate heat inleaks based on conceptual design of machine cryostats –Refine assessment of dynamic heat loads following progress of accelerator systems definition (particularly for FCC-ee RF) Cooling schemes –Explore variants for cooling schemes of superconducting accelerator components beam screens/beam pipes, including non-conventional working fluids Cryoplants –Investigate options for increase of unit capacity and efficiency, including impacts on operability, CAPEX and OPEX Cryogenic distribution –Define pipe sizes, conceptual mechanical and thermal design of distribution line, –Explore options of integrated piping vs external cryoline Integration –Study implantation at ground level and underground of cryoplant and distribution system Transients –Study cooldown/warmup time, current ramp/deramp, quench recovery Cryogen inventory –Address issues of inventory management (initial fill, thermal transients, losses) Ph. LebrunFCC I&O meeting 1504226

7. Topometry and survey CERN reference coordinate system –Extend to FCC area and link to Swiss and French systems –Extend geoid model to FCC area Alignment –Establish alignment accuracy requirements for accelerators and experiments –Compare use of existing methods with possible alternatives –Assess resources/schedule for initial alignment, periodic realignment (automation?) Ph. LebrunFCC I&O meeting 1504227

8. Personnel and equipment transport Vertical –Investigate design options for elevators and cranes with large lifting heights Horizontal/sloping –Technological watch on contactless guiding and powering of electrical vehicles –Study of “high”-velocity people mover in safe area of tunnel Traffic simulations –Vertical/horizontal traffic & duty cycle optimization for personnel access and equipment transport in installation and maintenance phases Automation and robotics –Investigate remote/automated intervention systems –Investigate robotics/remote handling for radiation-hot areas Ph. LebrunFCC I&O meeting 1504228

9. Utilities Electrical distribution –Collect requirements for normal, emergency and no-break power from the different accelerator and detector systems –Explore on-site and off-site distribution options (staging of voltages, network architecture including redundancy, location of substations, routing of lines) Cooling and ventilation –Collect requirements from technical systems –Define different modes of operation and standby –Establish general architecture of cooling (primary & secondary) and ventilation networks –Estimate power consumption in different modes –Study options for heat rejection and/or recovery Ph. LebrunFCC I&O meeting 1504229

10. Operation Reliability, availability, power & energy Operation –Define operational scenarios with injection, ramp, collision, turnaround time, as well as standby for FCC-hh and FCC-ee –Obtain prospective operation plans based on integrated luminosity goals at each collision energy, number of years of operation, luminosity efficiency, down times Reliability & availability –Start study with U Tampere, benchmark tool on available LHC data –First scaling to FCC Power & energy –Magnets: conduct analytical estimates based on actual accelerator lattices and magnet designs (powering circuits, cable losses, peak vs steady power) –RF: refine estimates based on progress vs conservative technology (cavity losses, RF powering chain efficiency) –Cryogenics, cooling & ventilation: iterate following technical definition of systems –Experiments: get analytical estimates –Map geographical distribution of power needs –Define heat removal and possible recovery paths Ph. LebrunFCC I&O meeting 15042210

11. Safety & environment Conventional safety –Develop safety studies in underground areas (MCA, fire containment, smoke/helium extraction, ODH, emergency access & egress) –Optimize sizing of cryogenic relief devices in two-phase & supercritical flow Radiation protection –Calculate radiation maps in and around tunnel(s) for personnel and equipment safety; estimate doses to ground water and atmosphere –Study radiological aspects of modified LHC as FCC-hh injector Environment –Prepare execution of environmental impact study Ph. LebrunFCC I&O meeting 15042211

12. Schedule Conduct first schedule exercises (Gannt) for accelerators, injectors and experiments based on available definition of technical systems –Establish unit advancement rates for different tasks and need for parallelism –Concurrent civil engineering and accelerator/detector series component manufacturing/installation –Identify risks of congestion in the production/reception testing/transport/installation chain Ph. LebrunFCC I&O meeting 15042212

13. Conclusions Substantial progress has been achieved in FCC Infrastructure & Operation studies since the First FCC Week in February 2014, concurrently with developments in accelerator design and technology Several collaborations with external partners have been set up and are now operational Some activities are about to start with arrival of fellows/students/collaborators In the second year of study, we need to home in onto reference designs of FCC-hh and FCC-ee (with possible variants) in order to refine configuration and sizing of infrastructure systems Ph. LebrunFCC I&O meeting 15042213