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Implementation at RAL

Implementation at RAL. Iouri Ivaniouchenkov on behalf of Elwyn Baynham, Tom Bradshaw, Tony Jones, Jim Rochford Engineering Department, RAL. MICE Collaboration meeting @ Columbia, 14 June 2003. Scope of presentation. Magnetic shielding : Latest results from magnetic simulation

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Implementation at RAL

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  1. Implementation at RAL Iouri Ivaniouchenkov on behalf of Elwyn Baynham, Tom Bradshaw, Tony Jones, Jim Rochford Engineering Department, RAL MICE Collaboration meeting @ Columbia, 14 June 2003

  2. Scope of presentation • Magnetic shielding : Latest results from magnetic simulation • done by Jim Rochford • Layout & Safety: Current status MICE Collaboration meeting @ Columbia, 14 June 2003

  3. MICE magnetic field: Conclusion from previous work • MICE will produce magnetic field which extends outside experimental hall: Configuration 5 Gauss Line Final MICE R~6800 mm, Z~13400 mm Solenoid mode R~14200 mm, Z~19900 mm Modified solenoid mode R~14900 mm, Z~21000 mm • Magnetic simulations are under way. First results show that shielding can be • achieved by using steel cladding in the hall. MICE Collaboration meeting @ Columbia, 14 June 2003

  4. 8 m 20 mm 20 mm 8 m r =4 m Coil axis Coil axis 20 m 2d axi-symmetric model of iron shield 3d rectangular model of iron shield 8 m 4 m 20 mm 20 mm 6 m 20 m Coil axis Coil axis 2 m 20 m MICE magnetic shield: Models 8 m 3d rectangular model of iron shield extended to ground level 3d rectangular model of iron shield top half only MICE Collaboration meeting @ Columbia, 14 June 2003

  5. MICE magnetic shields: Iron BH curve for iron as used in the models MICE Collaboration meeting @ Columbia, 14 June 2003

  6. MICE magnetic shield: Cylindrical shield 5 gauss line is within cylinder wall z R Plot showing flux lines in cylindrical shield Bpeak=0.82T MICE Collaboration meeting @ Columbia, 14 June 2003

  7. MICE magnetic shield: Complete rectangular shield 5 gauss line 3d model of complete rectangular shield Bpeak=0.67T MICE Collaboration meeting @ Columbia, 14 June 2003

  8. MICE magnetic shield: Half of a rectangular shield 5 gauss line 3d model of ½ a rectangular shield Bpeak=0.93T MICE Collaboration meeting @ Columbia, 14 June 2003

  9. MICE magnetic shield: Extended half of a rectangular shield 5 gauss line 3d model of a rectangular shield extending to floor Bpeak=0.82T MICE Collaboration meeting @ Columbia, 14 June 2003

  10. MICE magnetic shield: Peak field in shield Peak field in shield for different models MICE Collaboration meeting @ Columbia, 14 June 2003

  11. MICE magnetic shield: Effect on the axis field Effect of the presence of the shield on the axis field MICE Collaboration meeting @ Columbia, 14 June 2003

  12. MICE magnetic shield: Forces Top Fx=0,Fy=-1470,Fz=0 Sides Fx=(+/-)1330, Fy=-150, Fz=0 1470N 1330N 150N Y X Z MICE Collaboration meeting @ Columbia, 14 June 2003

  13. MICE magnetic shield: Summary • 2d and 3d models agree well • Can effectively contain 5 gauss line within hall by using a 20mm thick rectangular shield. • Initial calculations of the forces on the shield are small • The field has a very small effect on the axis field MICE Collaboration meeting @ Columbia, 14 June 2003

  14. Magnetic shielding: Cost estimation • Structure: • 4 wall box 8 m (width) *6 m (height) * 20 m (length) * 20 mm • = 11.2 m^3 • Material : soft magnetic steel (£600 / tonne) • Steel cost: 11.2 m^3 * 7.9 tonne/m^3 = 25.28 tonnes • -> £ 15168 (= 21316 Euro = 24965 $US ) • Shielding cost = steel cost * 2(3) = £ 30336 (£ 45504) MICE Collaboration meeting @ Columbia, 14 June 2003

  15. MICE layout • AutoCAD drawing for MICE experimental hall plus ISIS machine hall plus ISIS control room is finished by Tony Jones. • Various options for the layout of MICE are being considered. • Consultations with ISIS and RAL Safety Officers are under way. MICE Collaboration meeting @ Columbia, 14 June 2003

  16. MICE layout: 2D Model MICE Collaboration meeting @ Columbia, 14 June 2003

  17. MICE layout: Options Exit Main gate Option 1 slope stay clear zone 5 m 3.9 m beam axis services zone cellar trench 2.3 metres deep 6.8 m door High level exit Concrete radiation shielding Steel magnetic shielding Scale: 1 m MICE Collaboration meeting @ Columbia, 14 June 2003

  18. MICE layout: Options Option 2 Exit Main gate slope stay clear zone 5 m 3.9 m beam axis services zone cellar 4.8 m trench 2.3 metres deep door 1.6 m High level exit Concrete radiation shielding Steel magnetic shielding Scale: 1 m MICE Collaboration meeting @ Columbia, 14 June 2003

  19. MICE layout: Options Exit Option 3 Main gate slope services zone 5 m 3.9 m beam axis stay clear zone cellar 4.8 m trench 2.3 metres deep door High level exit 1.6 m Components transportation: By crane, a part of roof slides off By crane, a part of roof folds up On a moving platform without taking roof off Scale: 1 m Steel magnetic shielding Concrete radiation shielding MICE Collaboration meeting @ Columbia, 14 June 2003

  20. MICE layout: Options Option 4 Exit Door moved Main gate door slope services zone 5 m 3.9 m beam axis stay clear zone cellar 4.8 m trench 2.3 metres deep door door High level exit >= 0.8 m Scale: 1 m Steel magnetic shielding Concrete radiation shielding MICE Collaboration meeting @ Columbia, 14 June 2003

  21. MICE Shielding: Steel-lead sandwich Combined shielding: magnetic shielding + radiation shielding - crainable/movable sections (5-6 tonnes each) - steel/lead sandwich Lead 100 mm Steel 20 mm Steel 20 mm Pb Lead vs. Concrete Gamma Attenuation Factor Eγ = 1 MeV Eγ = 10 MeV Lead: t=100 mm 3168 282 Concrete: t=540 mm 3187 Concrete: t=1080 mm 287 1 m * 1 m section: 1.45 tonnes 1m * 4 m section: 5.8 tonnes MICE Collaboration meeting @ Columbia, 14 June 2003

  22. MICE Layout MICE Collaboration meeting @ Columbia, 14 June 2003

  23. MICE Layout MICE Collaboration meeting @ Columbia, 14 June 2003

  24. MICE Layout & Safety: Summary • Fire safety: • - existing door can be moved (more floor space plus better excess to • MICE control room) • - put 2 more doors at the MICE shielding to minimize escape roots • - keep pathway open along MICE • Radiation safety: • - detailed information is required for the RAL Radiation Safety Officer in • order to be able to calculate the shielding -> request to MICE • - combined shield concept (steel-lead sandwiched panels) to make shielding • compact and crainable/movable • Layout : • - hall layout is done; • - various options for the MICE layout are under consideration MICE Collaboration meeting @ Columbia, 14 June 2003

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