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Status of infrastructure

Status of infrastructure. Yury Ivanyushenkov Applied Science Division, Engineering and Instrumentation Department RAL. MICE Video Conference, August 17, 2005. Scope. Magnetic shielding in the MICE hall MICE hall preparations Support system overview Spectrometer solenoid support .

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Status of infrastructure

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  1. Status of infrastructure Yury Ivanyushenkov Applied Science Division, Engineering and Instrumentation Department RAL MICE Video Conference, August 17, 2005

  2. Scope • Magnetic shielding in the MICE hall • MICE hall preparations • Support system overview • Spectrometer solenoid support

  3. Magnetic shielding in the MICE hall

  4. MICE fringe fields: Problem Magnetic field should not exceed 5 gauss in a public area (ISIS control room). Magnetic modelling predicts that the 5 gauss line is outside the MICE hall – passive shielding may have to be used. Volume in blue: 1000 gauss field Volume in orange: 5 gauss field

  5. 20 mm r =4 m Coil axis 2d axi-symmetric model of iron shield Fringe fields: Passive magnetic shielding Flux lines from unshielded coils (MICE Stage 6) Flux lines from shielded coils with a cylindrical, 10 mm thick steel shield, D=10m.

  6. Magnetic shielding: Thickness Field detail in the shield region for the different thickness of steel cylinder modelled. 5 gauss

  7. 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 By Jim Rochford 8 m 3d rectangular model of iron shield extended to ground level 3d rectangular model of iron shield top half only

  8. MICE magnetic shields: Iron BH curve for iron as used in the models

  9. MICE magnetic shield: Complete rectangular shield 5 gauss line 3d model of complete rectangular shield Bpeak=0.67T

  10. MICE magnetic shield: Half of a rectangular shield 5 gauss line 3d model of ½ a rectangular shield Bpeak=0.93T

  11. MICE magnetic shield: Extended half of a rectangular shield 5 gauss line 3d model of a rectangular shield extending to floor Bpeak=0.82T

  12. MICE magnetic shield: Peak field in shield Peak field in shield for different models

  13. 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

  14. MICE magnetic shield: Forces Top Fx=0,Fy=-1470,Fz=0 Sides Fx=(+/-)1330, Fy=-150, Fz=0 1470N 1330N 150N Y X Z

  15. MICE magnetic shielding Revised 3D model: Open ended rectangular box model 20mm thick iron plate + Two 150mm thick iron plates ID 40mm OD 3.6m 6m 2m 17m 5.6m 3.8m

  16. MICE magnetic shielding For 200Mev/c, beta 43cm - mode Fringe field on outer walls

  17. MICE magnetic shield: Summary of modelling • 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 Next step: - Create a realistic two-wall model of the shield based on the MICE layout (see next slide) and the latest version of MICE magnetic configuration; - Check shielding efficiency ( wall thickness is a parameter).

  18. MICE magnetic shielding layout Magnetic shielding walls

  19. MICE magnetic shielding layout Magnetic shielding walls

  20. Magnetic shielding in the MICE hall Conclusion: • Preliminary modelling suggests that passive shielding of MICE will work. • Modelling needs to be finalized. • Magnetic shielding design needs to be completed.

  21. MICE hall preparations

  22. MICE phase I initial

  23. MICE phase I final

  24. MICE hall preparations: To-do list • Floor levelling: • concrete plinth at the lower floor part of the building • fill up the cellar • floor extension frame over the trench • Beam line radiation shielding support over the trench. • Staircases modification: • the staircase on the ISIS linac side of the building • the staircase on the ISIS control room side • Holes in the roof and the north wall: • in the roof – for ventilation ducts • in the wall – for hydrogen vents

  25. MICE hall preparations: To-do list (2) • Hydrogen system R&D area • hydrogen extract hood and vent lines • part of mezzanine floor • part of magnetic shielding wall • The rest of magnetic shielding walls. • Beam-line radiation shielding.

  26. MICE hall preparations: Status and plans • General layout is completed. • Discussion with RAL civil engineers has started • -> work will be done by the external company • Programme of hall modification is being prepared

  27. Support system overview

  28. Support structure – Layout and sequences

  29. MICE Stage IV MICE Stage V Support structure - Required rail positions Rail positions of downstream detector for Stages IV & V will overlap with final stage VI rail positions

  30. Support structure – Rail and Force transfer concept Traverse in X on rail system to give location to +/- 2mm Jack from rail and position in x-y-z to survey targets on vacuum vessel Shim to blocking plates to locate in x-y-z and react forces Survey Target Magnetic force Module Beam Axis Y Z X Shim Jacks Rollers Rails Y support location Floor Plate

  31. Support structure – Super-module Module to module joints to react forces in Z CC/RF module with stiff support structure

  32. Support structure – Rail-mounting concept Platform moves on rails Platform is jacked from the rails

  33. Support structure – Force transfer concept - Y Shimming to react vertical forces

  34. Support structure – Force transfer concept - Z Shimming to react axial (Z) forces

  35. MICE rail system Rails

  36. Height of the beam in the MICE hall Dia 650 Aperture in ISIS wall 1524* 1684.2 160* Support structure Concrete floor

  37. MICE support structure - Module weights Table from Wing Note: Table requires updating Crane lifting capacity is 12 tonnes (two cranes joined) or 8 tonnes (one crane)

  38. MICE support structure – Next steps • Revise support structure requirements/specs for full MICE • - include and analyze requirements of access to every module • ( collect information from all technical supervisors) • Who is doing this ? • Suggest support structure for Stage 2 (MICE phase 1) • (is it different from the one for complete MICE ?) • Discuss revised version of support structure at RAL meeting

  39. Spectrometer solenoid support

  40. Spectrometer solenoid positions Solenoid in the beam - position Solenoid out the beam - position

  41. Spectrometer solenoid support: Next steps • Revise support structure requirements • - include and analyze requirements of access • ( collect information from the technical supervisors) • Who is doing this? • Suggest support structure for spectrometer solenoid at RAL meeting

  42. MICE module max height Important: The max height from the bottom of the support frame to the top of a module should not exceed 3200 mm Concrete aperture Concertina door Hinged door Max vertical opening 3360 mm Max horizontal opening 3200 mm

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