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CLIC Status Compact Linear Collider CLIC Status Compact Linear Collider IAS Program - HEP Plenary, 21 January 2019 Andrea Latina, CERN on behalf of the CLIC and CLICdp Collaborations 1 CLIC Status Compact Linear Collider Project overview Physics reach Accelerator technologies Outlook Compact Linear Collider e+e– collisions up to 3TeV http://clic.cern/ IAS Program - HEP Plenary, 21 January 2019 Andrea Latina, CERN on behalf of the CLIC and CLICdp Collaborations 2 Collaborations http://clic.cern/ • CLIC accelerator design and development • CLIC physics prospects & simulation studies • (Construction and operation of CTF3) • Detector optimization + R&D for CLIC CLIC accelerator collaboration CLIC detector and physics ~60 institutes from 28 countries (CLICdp) 30 institutes from 18 countries IAS HEP 2019 Andrea Latina 3 CLIC IAS HEP 2019 Andrea Latina 4 CLIC layout and power generation Baseline electron polarisation ±80% IAS HEP 2019 Andrea Latina 5 CLIC layout – 3TeV Baseline electron polarisation ±80% IAS HEP 2019 Andrea Latina 6 CLIC CDR 2012 Updated Staging Project Implementation https://cds.cern.ch/record/1500095 Baseline 2016 Plan 2018 https://cds.cern.ch/record/1425915 https://cds.cern.ch/record/1475225 http://dx.doi.org/10.5170/CERN-2016-004 IAS HEP 2019 Andrea Latina 7 CLIC Key technologies have been demonstrated CLIC is now a mature project, ready to be built IAS HEP 2019 Andrea Latina 8 Updated CLIC Staging New! increased from 0.5+0.1ab–1 1.5ab–1 3ab–1 Electron polarisation enhances Higgs production at high- energy stages and provides additional observables Baseline polarisation scenario adopted: electron beam (–80%, +80%) polarised in ratio (50:50) at √s=380GeV ; (80:20) at √s=1.5 and 3TeV γγ collider using laser scattering also possible Upgrades using novel accelerator techniques also possible Staging and live-time assumptions following guidelines consistent with other future projects: Machine Parameters and Projected Luminosity Performance of Proposed Future Colliders at CERN arXiv:1810.13022, Bordry et al. IAS HEP 2019 Andrea Latina 9 CLIC Physics Precision Higgs e+ ν W H H H W e– ν e+ Z tt at √s=3TeV Z H H Precision e– H top Beyond Standard Model Issues not addressed by SM: origin of the weak scale interactions dark matter The CLIC origin of matter/antimatter asymmetry Yellow Report Potential in preparation for New Many new studies focused on discovery prospects at CLIC Physics Exploring the physics landscape as broadly as possible New! IAS HEP 2019 Andrea Latina 10 Higgs coupling sensitivity Full GEANT-based simulation studies including beam Each energy stage contributes significantly backgrounds of many channels at all 3 stages –> global fit including correlations; no assumptions on additional Higgs decays – unique to lepton colliders Precision <1% for most couplings c/b/W/Z/g couplings significantly more precise than HL-LHC even after 380GeV stage ΓH is extracted with 4.7 – 2.5% precision Higgs self-coupling requires high energy e+ e ν Z Using M(HH) + Z W H H H differential H distribution: H W e– H λ New! λ e– ν HHH HHH ∆λ/λ = +11% complementary dominates at 1.5TeV at higher √s –7% New! Based on Eur. Phys. J. C 77 475 (2017) updated to new luminosity scenario IAS HEP 2019 Andrea Latina 11 Top physics Intending threshold scan First study of boosted + – around 350 GeV (10 points, top production in e e ~1 year) as well as main initial- stage baseline √s=380GeV sensitive to top mass, width and couplings observe 1S ‘bound state’, ∆mt ~ 50 MeV √s=3Te FCNC decays + – V CP properties of ttH e e -> tt -> qqqqbb φ 2 Hadronic decays of high- cross-section and AFB sin energy top quarks do not -> resolved, semi-resolved, ∆ lead to 3 separated jets New! boosted –> identify substructure couplings to Z and γ arXiv 1807.02441: EFT interpretation Top-quark physics at the CLIC electron–positron –> initial and high-energy stages linear collider are very complementary in journal review sin2φ Polarisation provides new observables IAS HEP 2019 Andrea Latina 12 Key accelerator challenges • High-current drive beam bunched at 12 GHz • Power transfer + main-beam acceleration • 100 MV/m gradient in main-beam cavities • Produce, transport, and collide low-emittance beams • System integration, alignment and stability, engineering, cost, power … IAS HEP 2019 Andrea Latina 13 CLIC Test Facility (CTF3) IAS HEP 2019 Andrea Latina 14 Accelerator challenges Drive beam quality: Produced high-current drive beam bunched at 12GHz Key challenges: High-current drive beam bunched at 12 GHz Power transfer + 1.5 GHz Drive beam main-beam acceleration arrival time ~100 MV/m gradient in x2 stabilised main-beam cavities to CLIC Low emittance generation x4 specification Alignment & stability 28A 12 GHz of 50fs: Current in combiner ring Examples of measurements from CLIC Test Facility, CTF3, at CERN. CTF3 now the ‘CERN Linear Electron Accelerator for Research’ facility, CLEAR IAS HEP 2019 Andrea Latina 15 Accelerator challenges Demonstrated 2-beam acceleration Key challenges: High-current drive beam bunched at 12 GHz Power transfer + main-beam acceleration 31MeV = 145MV/m ~100 MV/m gradient in main-beam cavities Low emittance generation Alignment & stability IAS HEP 2019 Andrea Latina 16 Accelerator challenges X-band performance: achieved 100MV/m gradient in main-beam RF cavities Key challenges: High-current drive beam bunched at 12 GHz Power transfer + main-beam acceleration ~100 MV/m gradient in main-beam cavities Low emittance generation Alignment & Stability IAS HEP 2019 Andrea Latina 17 Accelerator challenges Nano-beams The CLIC strategy: • Align components (10μm over 200m) Key challenges: • Control/damp vibrations (from ground to accelerator) High-current drive beam • Measure beams well bunched at 12 GHz – allow to steer beam and optimize positions Power transfer + • Algorithms for measurements, beam main-beam acceleration and component optimization, feedbacks ~100 MV/m gradient in • Tests in existing accelerators of equipment main-beam cavities and algorithms (FACET at Stanford, Low emittance generation ATF2 at KEK, CTF3, Light-sources) 2008 CLIC emittance at damping rings IAS HEP 2019 Andrea Latina 18 Accelerator challenges Nano-beams The CLIC strategy: • Align components (10μm over 200m) Key challenges: • Control/damp vibrations (from ground to accelerator) High-current drive beam • Measure beams well bunched at 12 GHz – allow to steer beam and optimize positions Power transfer + • Algorithms for measurements, beam main-beam acceleration and component optimization, feedbacks ~100 MV/m gradient in • Tests in existing accelerators of equipment main-beam cavities and algorithms (FACET at Stanford, Low emittance generation ATF2 at KEK, CTF3, Light-sources) 2016 CLIC emittance at damping rings IAS HEP 2019 Andrea Latina 19 Low emittance transport Stabilise quadrupole O(1nm) @ 1Hz 1) Pre-align BPMs+quads accuracy O(10μm) over about 200m 3) Use wake-field monitors accuracy O(3.5μm) – CTF3 FACET FERMI 2) Beam-based alignment PACMAN, Marie Curie Action: • vertical RMS error of 11μm • i.e. accuracy is approx. 13.5μm 20 20 Final focus system ATF2 @ KEK 21 Towards industrialisation Investigating paths to industrialisation Baseline manufacturing technique: bonding and brazing Alternatives: brazing as for SwissFEL machining halves Target is structures that are low-cost & easy-to-manufacture IAS HEP 2019 Andrea Latina 22 SwissFEL – C-band linac • 104 x 2m-long C-band structures (beam 6 GeV @ 100 Hz) • Similar μm-level tolerances • Length ~ 800 CLIC structures • Being commissioned IAS HEP 2019 Andrea Latina 23 Power Preliminary power consumption for 380GeV CLIC Being updated for changes in design parameters, and using operating (not specification) values for RF power sources and magnet power supplies Included so far: Vacuum systems RF and RF power systems Magnet & magnet powering systems Beam instrumentation Active alignment and stabilization 2016 estimate in ML and BDS Electricity To be added: Experimental area Cooling & ventilation Safety systems Total energy use will be updated +~20–30% once power consumption complete Machine control & operational infrastructure ( Klystron-based option: 142 MW + ~20-30% ) Final power estimate will be < 200MW (compared with 252MW in 2016) IAS HEP 2019 Andrea Latina 24 380 GeV Klystron option IAS HEP 2019 Andrea Latina 25 Cost Machine has been bottom-up re-costed in 2018 Cost ~5.9 BCHF for initial stage (Finalised for ESU) Maintenance cost 116 MCHF per year. Project Implementation Plan 2018 IAS HEP 2019 Andrea Latina 26 Schedule Updated schedule: CLIC 11km tunnel option - 380GeV - Drive Beam Option Construction + commissioning: 7 years 380 GeV Zone 3 sector 3-1 1 sector 1-2 2 Depth (m) 80 124 110 Length (km) 5.7 5.7 1 1 2 2 3 Q1 2 Q1 3 3 4 4 Q2 5 5 Q2 6 6 haft 7 haft 7 Year 1 S 1 Q3 8 S 8 Q3 9 9 10 10 Q4 11 1 11 Q4 12 12 1 1 Q1 2 2 Q1 3 3 4 haft 4 Q2 5 S 5 Q2 6 6 Year 2 7 7 2 Q3 8 8 Q3 9 9 10 10 Q4 11 11 Q4 12 12 1 1 Q1 2 2 Q1 3 3 4 4 Q2 5 5 Q2 6 6 3 7 SU SU SU SU 7 3 Year Q3 8 8 Q3 9 9 10 10 Q4 11 GS GS 11 Q4 12 11 12 1 1 Q1 2 2 Q1 3 3 4 haft CV CV CV CV 4 Q2 5 S 5 Q2 6 6 4 7 7 4 Year Q3 8 8 Q3 9 EL EL EL EL 9 10 10 Q4 11 11 Q4 12 12 1 1 Q1 2 2 Q1 3 3 4 4 Q2 5 5 Q2 6 6 5 7 7 5 Year Q3 8 8 Q3 9 9 10 10 Q4 11 11 Q4 12 12 1 1 Q1 2 2 Q1 3 3 4 4 Q2 5 5 Q2 6 6 6 7 s System Commissioning @380GeV 7 6 Year Q3 8 8 Q3 9 9 10 10 Q4 11 11 Q4 12 12 1 1 Q1 2 2 Q1 3 3 4 p 4 Q2 5 5 Q2 6 6 7 7 Beam Commissioning @380GeV 7 7 Year Q3 8 8 Q3 9 9 10 10 Q4 11 11 Q4 12 12 IAS HEP 2019 Andrea Latina 27 Schedule Updated schedule: Construction + commissioning: 7 years, followed by 25–30 year physics programme IAS HEP 2019 Andrea Latina 28 CLIC roadmap IAS HEP 2019 Andrea Latina 29 Next phase 2020–2025 Preparation Phase: Finalisation of implementation parameters Preparation for industrial procurement Drive Beam Facility & other system verifications Technical Proposal of the experiment Site authorisation 2026 Construction start IAS HEP 2019 Andrea Latina 30 CLIC technology applications CLIC technology for different applications • CompactLight: EU co- funded FEL design study INFN Frascati advanced acceleration facility • SPARC at INFN-LNF EuPRAXIA@SPARC_LAB • …many other small systems..
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