1. The HiLumi LHC Design Study is included in the High Luminosity LHC project and is partly funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement 284404. Crab cavities cryomodule Federico CARRA CERN, EN/MME On behalf of crab cavities collaboration team

2. General FC, 20/November/2014 4th HiLumi-LHC/LARP annual meeting @ KEK2 LHC Point 1 (vertical crabbing) 4 cavities / IP side/ beam to be installed during LS3 LHC Point 5 (horizontal crabbing) 4 cavities / IP side/ beam to be installed during LS3 SPS BA4 (vertical or horizontal crabbing) One or two cryomodules with 2 identical cavities to be tested before LS2 SM18 area Cold tests and clean room facilities – cold test of cryomodules prior tunnel installation

3. LHC General FC, 20/November/2014 4th HiLumi-LHC/LARP annual meeting @ KEK3 See presentation by Paolo Fessia this morning 4 cavities / IP side / beam between D2 and Q4 => Total 32 cavities in LHC

4. LHC 4 cryomodules x 2 cavities each / IP side General FC, 20/November/2014 4th HiLumi-LHC/LARP annual meeting @ KEK4 See presentation by Paolo FESSIA this morning Lateral view Top view

5. SPS Tests cavities with beam before LS2 – space for one cryomodule General FC, 20/November/2014 4th HiLumi-LHC/LARP annual meeting @ KEK5 See presentations this morning by Alick MACPHERSON Krzysztof BRODZINSKI 4 cavities / IP side / beam between D2 and Q4 => Total 32 cavities in LHC

6. SPS 2 (identical) cavities in a cryomodule 2 different cryomodules under design Timeline: General FC, 20/November/2014 4th HiLumi-LHC/LARP annual meeting @ KEK6 4 cavities / IP side / beam between D2 and Q4 => Total 32 cavities in LHC 2015 Cavities fabrication and testing & Cryomodule fabrication 2016 Cryostating & SM18 Cryomodule tests End 2016 Install Cryomodule 1 in SPS 2017 SPS Run 1 End 2017 Install Cryomodule 2 in SPS 2018 SPS Run 2

7. Two different cryomodules under development 7 Cryomodule with DQW cavitiesCryomodule with RFD cavities 4th HiLumi-LHC/LARP annual meeting @ KEK FC, 20/November/2014 Cryomodule

8. 8 Cryomodule with DQW cavities 4th HiLumi-LHC/LARP annual meeting @ KEK FC, 20/November/2014 Cryomodule Vacuum vessel Warm magnetic shielding Thermal shielding Fundamental Power Coupler High Order Modes Suppressor Tuning system Helium vessel Cavity Alignment monitoring system

9. 9 Cryomodule with RFD cavities 4th HiLumi-LHC/LARP annual meeting @ KEK FC, 20/November/2014 Cryomodule See presentation by Vincent BAGLIN this morning

10. DQW 104th HiLumi-LHC/LARP annual meeting @ KEK FC, 20/November/2014 RFD Bare cavities See presentation by Alessandro RATTI this morning Engineering specification by CERN / checked with LARP & UK EDMS 1389669 “Engineering Specification for the dressed bulk niobium Crab Cavities” Manufacturing of cavities launched by LARP, close collaboration with CERN for QA follow-up

11. 11 DQW Specification drawing – LHCACFCA0001RFD Specification drawing – LHCACFCA0002 4th HiLumi-LHC/LARP annual meeting @ KEK FC, 20/November/2014 Bare cavities

12. DQW 124th HiLumi-LHC/LARP annual meeting @ KEK FC, 20/November/2014 RFD Dressed cavities Detailed design for manufacturing under finalization including helium vessel, HOM couplers, interface for tuning system and alignment system Manufacturing feasibility tests launched at CERN for different components: cavity, helium vessel, HOM, tuning system

13. 134th HiLumi-LHC/LARP annual meeting @ KEK FC, 20/November/2014 Cold magnetic shielding Cold magnetic shielding inside helium vessel Developed by colleagues from UK

14. 144th HiLumi-LHC/LARP annual meeting @ KEK FC, 20/November/2014 Tuning system Tuning system development Main integration constraint: limited space below RF Waveguide DQW RFD Dedicated set- up in SM18 for tuning system validation on PoP cavities Concept approved, fabrication drawings in progress

15. 154th HiLumi-LHC/LARP annual meeting @ KEK FC, 20/November/2014 Higher Order Modes suppressor couplers HOM couplers: Extensive collaboration between LARP, UK, CERN Complex shapes of bulk niobium with tight tolerances Actively cooled by superfluid helium at 2K Manufacturing specification drawings ongoing DQW RFD

16. 164th HiLumi-LHC/LARP annual meeting @ KEK FC, 20/November/2014 Vacuum vessel Mechanical optimization of vacuum vessel to limit deformation and guarantee cavity alignment in operation

17. 174th HiLumi-LHC/LARP annual meeting @ KEK FC, 20/November/2014 Optimisation of thermal performance Cryomodule thermal performance detailed optimization: Example : HOM coaxial line – static and RF losses – geometry and thermalisation optimisation EDMS 1405244 v.1 Total losses @ 2K : ~ 32 W (static + dynamic)

18. Conclusions Two crab cavities designs considered for tests in SPS Two related cryomodules development ongoing Bares cavities manufacturing launched; Close collaboration for engineering specification and manufacturing among UK, LARP and CERN Dressed cavities manufacturing specification drawings ongoing, will be launched for manufacturing this year Cryomodule parts under detailed design, manufacturing during 2015 First cryomodule planned to be tested in SM18 mid-2016 and installed in SPS end-2016 Cryomodule design for LHC planned to be as close as possible to SPS solutions FC, 20/November/2014 4th HiLumi-LHC/LARP annual meeting @ KEK18