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. Engineering specification Dressed Cavities Design Review (WP4) Date: 06.05.2015 C. Parente (TQO) On behalf of the Technical Coordination Office

2. Detailed system architecture RF systems and crab cavities (WP4) RF superconducting crab cavities SPS prototype (ACF) Cryomodule (ACFGA) Vacuum vessel (ACFVT) External supports (HACF) Cryostat components (ACFAC) Cryogenic circuits Supports Thermal shield Warm Magnetic shield Dressed cavities (ACFDC) Bare cavities with interfaces (ACFCA) Tuning system (ACFTU) Helium vessel (ACFHT) HOM couplers (ACFHC) Cold magnetic shield (ACFMS) Instrumentation (ACFIS) Main coupler (ACFMC) Vacuum valves (VVG) RF services (ACFSV) LLRF & Fast Controls (ALL) RF racks (AY) Slow controls (AS) Transmission lines (ACFWG) Pick-ups (APW) LHC (idem to SPS) Harmonic system 200 MHz 800 MHz Wide-band feedback system Date: 12.11.2014 2

3. Product Breakdown Structure (PBS) RF superconducting crab cavities (ACF__) Cryomodule (ACFGA) Dressed cavities (ACFDC) Tuning system (ACFTU) HOM couplers (ACFHC) Cold magnetic shield (ACFMS) RF services (ACFSV) Based on present acquisition strategy CERN (EN-MME) US-LARP Collab. CERN (EN-MME) CERN (EN-MME) UK Collab. 3 Active part Bare cavities Tuning system Helium vessel HOM couplers Cold magnetic shield ACFDC US-LARP UK CERN Active part Tuning system Passive part ACFDC Niowave?

4. Scope Scope Applicable documents Applicable documents Technical requirements for [Entity #1] Technical requirements for [Entity #1] Verification of [Entity #N] Verification of [Entity #N] (…) (…) Technical requirements for [Entity #N] Technical requirements for [Entity #N] Verification of [Entity #N] Verification of [Entity #N] Documentation Documentation Appendix(es) Appendix(es) Engineering specification - Main contents Template: EDMS #1372969 Flexibility: sub-sections are proposed and can be added if needed or removed (when not applicable)

5. 5 Applicable documents Standards Review of the overall specified standards to include systematically US and EU/International standards (not yet completely made). Exceptions exist for some cases when required by Safety Regulations.

6. 6 Bare cavities with interfaces Requirements defined on the 1 st version of the specification (EDMS: 1389669) Main modification: added possibility of using also EU/International standards (in some cases mandatory, imposed by Safety Regulations). Note: in principal, this only concerns materials that have not yet been purchased or that are acquired directly by CERN. Bare cavity

7. 7 Helium vessel Materials? Titanium grade 2 according to DIN 17860 (for compliance with Safety Regulations) instead of ASTM B265-13a – to be confirmed Bolts Drawings? Manufacturing process & corresponding verification requirements? Shaping Non-permanent joints  bolts He vessel

8. 8 HOM Couplers Identical requirements as for the helium vessel and bare cavities, whenever appropriate, have been defined Drawings? HOM coupler actuator

9. 9 Tuning system Requirements have been specified for the passive part only (active part will be object of a dedicated, separate, specification) and identical to those for the helium vessel Drawings? Tuning system

10. 10 Cold magnetic shield Joints materials (if pre-assemblies are supplied)? Drawings? Manufacturing process & corresponding verification requirements Any pre-assembly foreseen? If yes, what are the requirements for permanent/non- permanent joints?

11. 11 Dressed cavities (1/2) Putting all the parts together… Putting all the parts together… Manufacturing processes & corresponding verification requirements Permanent/non-permanent joints Assembly requirements Assembly sequence (if required) Mandatory manufacturing and inspection steps to be respected during assembly of the different parts composing the dressed cavities Dressed cavity

12. 12 Dressed cavities (2/2) 1.What is the assembly sequence? 2.What are the critical steps and required quality controls/tests that are mandatory during assembly?

13. 13 What’s next (short-medium term)? Completion of the engineering specification with the identified points and annex documentation. Release on EDMS (May/June 2015?) Establishment of EDMS structure to archive all the design, fabrication, assembly and tests documentation (May 2015) Manufacturing readiness review(s)? The final manufacturing and inspection plans, and the manufacturing documentation (drawings, procedures, qualifications,…) for the different acquired parts have to be available and approved by CERN prior to the start of manufacturing.