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WP2 Superbeam Work Breakdown Structure

This document outlines the breakdown of work and cost drivers for the WP2 Superbeam project, including infrastructure, services, beam transport, target station, decay volume, beam dump, and near detector. It also addresses cost, design, and safety issues.

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WP2 Superbeam Work Breakdown Structure

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

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

  6. 1. Proton Driver

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

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

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

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

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

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

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

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

  15. 7. Near Detector: from WP58. 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: • Proton Driver (shared with NF) – SPL costs already estimated by R. Garoby • Civil Engineering: Tunnelling, buildings (NB strongly site specific) • Shielding: Steel and Concrete • 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

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