1. DTL prototype summary and production sequence F.Grespan LNL - 2015_06_22 CDR

2. Contents Prototype summary Production sequence Major procurements LNL - 2015_06_22 CDR

3. Prototype summary DONE PMQ prototype. BPM: re-brazed strip line (vacuum leak in the 1 st test), connector brazed ready to be welded Steerer: preliminary design for magnet and drift tube. Cu-Plating stem: Italian company qualified. Brazing after cu-plating: test done E-beam welding over brazed joint: test done (Zanon), vacuum and micrographic analysis Single brazing step of Drift tube (DT-body + sep.cylinder + sleeve body + stem + electrical connection channel) → vacuum leak on the inner channel brazing Tank: qualified company for forged cylinder procurement LNL - 2015_06_22 CDR

4. Prototype summary To be done Tig welding of inner channel after stem brazing PMQ prototype: installation in a drift tube, EBW of DT cover (Zanon) BPM: connector to be welded, electro- magnetic test, installation in a drift tube. Steerer: detailed design for steerer (Danphysik), installation in a drift tube. Tank: 2-m module to be machined and cu- plated (GSI, CERN) High power test: delivery of RF solid state amplifier late of at least 1 year (company failed the delivery of the first module, contract passed to the second company). This test is not decisive to validate the design. LNL - 2015_06_22 CDR Beam pipe Steerer (cables not represented)

5. Production sequence LNL - 2015_06_22 CDR 1.Forged cylinders production, tank machining, copper plating. Girder and other components, CMM and vacuum tests… 2.Production of the beam components (PMQ, BPM, dipole steerers) 3.Production of vacuum, support and inter-tank components 4.DT Brazed structure production (with cooling circuit tested) 5.Integration of the beam component in the DT 6.E-beam welding sealing, final tests on DTs 7.Assembly of the module (2 m), installation and alignment of the DTs 8.Assembly of the tank (4 modules), alignment, machining of the adaptation rings for relative position, tuning, tuners, ports, vacuum test,… 9.Installation and alignment of the tanks in the tunnel, installation of the intertank plates 10.Installation of vacuum, cooling, RF couplers…. NOTE 1-6 al INFN site, 7-8 DTL workshop at Lund, 9-10 in the tunnel

6. DTL part list 1.Tanks (n=5) i.Module cylinder 20 ii.Girder 20 2.Drift tubes 60+33+28+25+22=168 (four kinds, with PMQ n=89, steerers n=30, BPM n=15, empty n=39) 3.RF Components 1.Couplers 10 2.Pick up 9x5=45 3.Tuners fixed 115, movable 15 4.Post couplers 123 4.Beam Components 1.PMQ 31(L=50mm)+58(L=80mm) 2.Steerers 6x5=30 3.BPM 3x5=15 5.Vacuum components (10 manifolds) 6.End plates and 4 intertanks 1.End covers 10, with PMQ 5, with beam current monitor 5 2.N=4 intertanks 7.Support and alignment 1.N=5 isostatic support 2.N=4 alignment tables

7. Major procurements LNL - 2015_06_22 CDR Major Procurements At least one producer qualified Name Notes Tank forged material (stainless steel)yes similar tube delivered to INFN Forged OFE Copperyes small parts Stainless steel componentsyes small parts Tank & girder machiningyesCompany 1Linac4 prototype and production Tank copper platingyesGSI-CERNLinac4, SNS, Mou with GSI in preparation Drift Tubes machining, stem machining, cu- plating., brazing, vacuum and water tests. Tuners, Post Couplers production. 80%Company 2INFN prototypes PMQ (material, machining, field test)NoCompany 4INFN prototype BPM production and testNoCompany 5Prototype done, Connector ready Steerer dipoles and power supplies (detailed design, production, field tests) NoCompany 6Budgetary offer acquired E-beam welding50%Company 7Zanon, INFN prototype Movable tunersyescompany 8Linac4 production RF windowsyescompany 9Offer from Mega Industries Vacuum valvesyesCompany 10standard Intertank boxes, Coupler WaveguidesyesCompany 11standard SupportsNoCompany 12ESS standard to be developed Cooling skid and cooling circuit componentsyesCompany 13IFMIF, TRASCO skids done Local control system As for IFMIF RFQ, internal design and components procurement

8. Production sequence of a single tank (and time estimate) LNL - 2015_06_22 CDR ActivityDurationWhere DTL production 7 monthsItaly Tanks Machining 6 monthsCompany 1 cu-plating 1 monthsGSI-CERN Drift tubes machining and brazing4 monthsCompany 2 beam equipment production4 monthsCompany 4,5,6 assembly and e-beam welding3 monthsLNL-Company 7 Ancillaries (support, vacuum, cooling, RF couplers, etc.) Company 8,9,10,11,12,13 Assembly at Lund 5 monthsLund DTLW assembly of Drift tubes on 4 modules 2 m long (two in parallel) 1.5 months assembly of 8 m long DTL cavity2 months field tuning1.5 months Transfer to Tunnel 1 monthLNL-ESS Alignment Assembly of ancillaries RF conditioning @ 5% duty cycle1 monthLNL-ESS

9. Schedule 9 Istituto Nazionale di Fisica Nucleare (Italy)

10. Schedule 10 Istituto Nazionale di Fisica Nucleare (Italy)

11. Some notes The responsibility of the main production steps (sharing between companies, lab..) is univocally determined (QA management clear). Production (in Italy) and assembly (in Lund) can be done in parallel. Tank 4 production (7 months) → parallel production of Tank 3, 1, 2, 5 during assembly in Lund (25 months) The assembly of the tank at Lund in DTLW is INFN responsibility, the participation of a ESS technical team may be recommended for training. The detailed RF conditioning and Beam commissioning procedure (to be agreed between INFN and ESS group) is necessary for addressing the production sequence. Beam commissioning is part of the INFN “in-kind”, but is not considered in this sequence. LNL - 2015_06_22 CDR