1. WP2 Superbeam Work Breakdown Structure Version 2 Chris Densham (after Marco Zito version 1 )

2. Use other experience where possible, e.g. CNGS – operating(!) T2K – operating - 4 MW target station already built LBNE – working towards CDR

3. e.g.T2K Secondary Beam Line DV TS BD Hadron Absorber (Beam Dump) graphite core in helium vessel Target station (TS) Target & horns in helium vessel Helium vessel and iron shields cooled by water Decay Volume (DV) 94m long helium vessel cooled by water 6m thick concrete shield ‘280 m’ neutrino detector 50 GeV PS ring Primary beam line Fast extraction Kamioka

4. Cost Drivers for T2K From T2K construction Proton driver excluded (available ‘free’) Cost driver for T2K = Utilities [buildings, power, shielding?] NB Cost Driver probably Civil Engineering for an underground Target Station in rock

5. 2 nd Preliminary WBS for WP2 1.Proton driver: COST DRIVER. SPL based, in common with NF 2.Infrastructure and Services – COST DRIVER for secondary beamline 3.Beam splitter and transport system 4.Target Station and Collector 5.Decay pipe 6.Beam Dump 7.Near Detector: from WP5 8.Far Detector : COST DRIVER but excluded from this WP

6. 1. Proton Driver

7. 2. Infrastucture and Services (1) 1.Civil Engineering (secondary beamline Cost Driver (I)) 1.Site and engineering studies 2.Underground features 1.Shafts 2.Beam transport tunnel 3.Target station hall 4.Decay volume tunnel 5.Beam Dump hall 6.Near Detector hall 3.Surface Buildings (excluding offices, workshops, assembly, services etc. buildings, assumed pre-existing CERN infrastructure) 1.Shaft access 2.Target station 3.Beam Dump 4.Near Detector 4.Site development 1.Roads 2.Environmental 3.Misc. site works

8. 2. Infrastucture and Services (2) 2.Shielding (secondary beamline Cost Driver (II)) 1.Target station shielding: c. 2.2 m iron + 1 m concrete (from T2K Target Station designed for 4 MW) 2.Beam Dump shielding 3.Hot cell shielding 4.Services plant shielding 3.‘Conventional’ Services 1.AC Power 2.Cooling water and air conditioning 3.Vacuum 4.Cranes 5.Misc. building services

9. 3. Beam splitter and transport system 1.Accelerator and component design, R&D 2.Beam separator magnet, switchyards etc 3.Beam transport magnets 4.Power supplies 5.Beam diagnostics, instrumentation 6.Cabling

10. 4. Target station concept (I) a la T2K Inner iron shield (2.2 m thick) Inner concrete shield (1 m thick) Support structure = Helium vessel BaffleTarget and 1st horn 2nd horn 3rd horn Beam window

11. 4. Target station concept (II): (faster to exchange target/horn systems but costly) Service s

12. 4. Target Station and Collector 1.R&D (Beam window, target, horn + power supply) 2.Target helium vessel 3.Shielded component supports (horizontal or vertical handling?) 4.Beam window (based on T2K if possible) 5.Baffles (x 4, based on T2K) 6.Target and collector system 1.Targets (x 4) 2.Horns (x 4) 3.Target and horn handling systems 4.Shielded disposal casks 7.Hot cells 1.Manipulators 2.Shielding windows 3.Services 8.Horn power supply + strip lines 9.Other PSUs 10.Active cooling systems for: target (helium or water), horn, baffle, beam window 11.Active ventilation systems for: hot cell, shielding, plant rooms 12.Control Room, diagnostics, instrumentation 13.Cabling, pipework including secondary containment

13. 5. Decay Volume 1.Vessel construction and installation (4 m x 20- 40 m) 2.Active cooling system (e.g. water (T2K), air (planned for LBNE)) T2K Decay Volume water cooling

14. 6. Beam Dump (CNGS => T2K => SPL SB) 1.Core (graphite + iron) 2.External cooling modules 3.Active cooling water system 4.Provision for replacement? (Cost vs risk) T2K Beam Dump

15. 7. Near Detector: from WP5 8.Far Detector : excluded from this WP

16. Cost / Design Issues Cost  risk Build costs  running costs? Integrated yield  integrated costs? Target Station Design choices depend on grasp of these issues

17. Cost Drivers: the good news? Our ideas of the Cost Drivers are: 1.Proton Driver (shared with NF) – SPL costs already estimated by R. Garoby 2.Civil Engineering: Tunnelling, buildings (NB strongly site specific) 3.Shielding: Steel and Concrete 4.Far Detector (excluded from this WP) Item 1 is already estimated Items 2 and 3 are relatively easy to parameterise and estimate based on CERN costing tool Item 4 is excluded

18. Safety Issues Civil engineering and construction Lifting / handling Maintenance of active components Fault scenarios – risk of radioactive emissions