ESS WP4 Strategy for series production ESS TAC10 – 5th to 6th November Lund Sébastien Bousson WP 4 leader

 S. Bousson, WP4 Strategy for series production, ESS TAC10 – 5 th – 6 th November Lund Construction plan for the spoke The ESS construction plan for the spoke cryomodules is relying on the following : A spoke prototype cryomodule tested at full RF power in Uppsala (in end 2015) premises to check 95% of the required performances A set of procedures (cavity preparation, cavity string assembly, cryomodule assembly) defined and tested during prototyping phase (2014 – 2015). A 6 months time available between experimental results on cryomodule and start of series production for a “design adjustments” (i.e. mainly mechanical slight modifications to potentially improve or facilitate cryomodule assembly): between 1 st nov & 30 th April 2016

 S. Bousson, WP4 Strategy for series production, ESS TAC10 – 5 th – 6 th November Lund Construction plan for the spoke 1.Niobium procurement & lead time Scheduled between March 2015 and Sept Several suppliers world wide Niobium for prototype is from Tokyo Denkaï Order all niobium for spokes in one single procurement Supplier strategy: only 1 (for the ~ 4 tons of Nb) Spare strategy: to be defined, but it will probably be a low percentage (i.e equivalent to 1 more cavity). Questions: - Any potential gain (cost) to group with niobium supply for the elliptical part ? → probably not, so it is not foreseen to group.

 S. Bousson, WP4 Strategy for series production, ESS TAC10 – 5 th – 6 th November Lund Construction plan for the spoke 2.Spoke cavity procurement & lead time Scheduled between Feb and Feb Several companies world wide, several in Europe (3) Reminder: Prototypes from SDMS (Fr) and Zanon (It) Order the 26 spoke cavities in one single procurement Supplier strategy: - only 1 (preferred scenario) – it’s cost effective & less required work for fabrication follow-up - 2 contractors is of course possible, but no clear advantages (not necessary for schedule reasons for instance) Spare strategy: no spare, as decided by ESS Allocated production lead time will allow 2 phases: - a pre-production (2 or 4 units) to check production processes and quality, constituting a Go/NoGo for phase 2. - a series production for the remaining (22 or 24) units

 S. Bousson, WP4 Strategy for series production, ESS TAC10 – 5 th – 6 th November Lund Construction plan for the spoke 3.Spoke power coupler procurement & lead time Scheduled between May 2016 and February 2018 Several companies world wide, several in Europe Reminder: prototypes from SCT (Fr) and PMB (Fr) Order the 26 power couplers in one single procurement Supplier strategy: - only 1 (preferred scenario) – it’s more cost effective & required less work for fabrication follow-up - 2 contractors is of course possible, but no clear advantages (not necessary for schedule reasons for instance) Spare strategy: no spare, as decided by ESS Allocated production lead time will allow 2 phases: - a pre-production (2 or 4 units) to check production processes and quality, constituting a Go/NoGo for phase 2. - a series production for the remaining (22 or 24) units

 S. Bousson, WP4 Strategy for series production, ESS TAC10 – 5 th – 6 th November Lund Construction plan for the spoke 4.Spoke cold tuning system procurement & lead time Scheduled between June 2016 and Dec Several companies world wide (but very limited for motor and piezo) Order the 26 CTS in one single procurement Supplier strategy: only 1 Allocated production lead time will allow 2 phases: - a pre-production (2 or 4 units) to check production processes and quality, constituting a Go/NoGo for phase 2. - a series production for the remaining (22 or 24) units Spare strategy: no spare, as decided by ESS

 S. Bousson, WP4 Strategy for series production, ESS TAC10 – 5 th – 6 th November Lund Construction plan for the spoke 5.Cryomodule parts procurement & lead time Scheduled between July and Déc Several companies world wide, several in EU Order the parts for 26 cryomodules in one single procurement Supplier strategy: only 1 Spare strategy: no spare, as decided by ESS

 S. Bousson, WP4 Strategy for series production, ESS TAC10 – 5 th – 6 th November Lund Construction plan for the spoke A.Cavity preparation and test Scheduled between 1 st March 2017 and 31 st June 2018 Preparation (chemical etching, HPR & clean room assembly) and tests in VT at IPNO premises - Corresponds to 1 VT (and 1 preparation) per 17 days Under study: a new VT for testing 2 cavities at the same time to double the test rate B.Power coupler preparation and RF conditioning Scheduled between 1 st Dec and 28 th Feb 2018 Preparation and RF conditioning in IPNO premises - Corresponds to a conditioning rate of less than one coupler pair per month (as 1 week conditioning time is foreseen, we have margin here)

 S. Bousson, WP4 Strategy for series production, ESS TAC10 – 5 th – 6 th November Lund Construction plan for the spoke C.Cryomodule series assembly Scheduled between 1 st May 2017 and 30 th October 2018 Corresponds to a rate of 1 cryomodule assembled per 5.5 weeks 2 scenarios under study - Assembly (in and out clean room) to be done by industry at IPNO premises (most probable scenario) - Assembly (in and out clean room) to be done by industry at the company premises Last spoke cryomodule delivered to ESS on Xmas of 2018 ! D.Spoke cryomodule tests at high power in Uppsala Scheduled between 1 st August 2017 and Dec Corresponds to a test rate of one cryomodule per 1.3 month