1 / 31

FLARE Constructing the detector

Fermilab Liquid Argon Experiments . FLARE Constructing the detector. First FLARE Workshop November 4-6, 2004 Rafael Silva Fermilab / PPD / MD. Overall Project Scale (Model by Bartoszeck Engineering). Some numbers Inner tank Height: 108 ft = 33 m Diameter: 132 ft = 40 m

jesse
Download Presentation

FLARE Constructing the detector

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fermilab Liquid Argon Experiments FLAREConstructing the detector First FLARE Workshop November 4-6, 2004 Rafael Silva Fermilab / PPD / MD

  2. Overall Project Scale(Model by Bartoszeck Engineering)

  3. Some numbers • Inner tank • Height: 108 ft = 33 m • Diameter: 132 ft = 40 m • Volume: 1,500,000 ft3 = 11,000,000 gal = 42,000 m3 • Argon density = 1.4Þ total weight = 60 kton • Weight of inner tank cylindrical wall = 1.5 kton

  4. We can divide the design and construction issues in 3 major groups: • Tank • Detector • Integration of detector into tank structure

  5. Tank issues • Shape • Design requirements • Material • Insulation

  6. Shape • Double steel wall • Insulation between walls • Flat bottom • Flat roof (short electronics path) or self-supporting curved roof

  7. CB&I double steel wall tank

  8. Design requirements • Roof structure capable of supporting vertical wire load of 300 tons • Side wall capable of supporting horizontal wire load of 115 tons

  9. Design requirements (cont.) • Access to electronics on top of roof • No leaks (from joints) • No contamination (from internal surfaces)

  10. 3D model(Model By Chuck Crimm / FNAL)

  11. Material • Normally used: 9% Ni alloy steel • 3 x costlier than regular carbon steel, • ductile at low temperatures, • somewhat better corrosion resistance. • May it be coated?

  12. Material (cont.) • Stainless steel (no atmospheric corrosion) • 9 x costlier than regular carbon steel, • ductile at low temperatures, • may have lower strength (thicker, heavier, costlier)

  13. Insulation • Perlite (expanded volcanic glass) • Normal “in place” density range between 8 and 9 lb/ft3

  14. Detector • 6 HV wire sectors, • 7 cathode planes, and • field shaping tubes in between them.

  15. Detector Each wire sector has 6 wire planes oriented at: +30°, -30°, vertical, vertical, -30°, and +30°, in this order.

  16. Layout of wire sectors

  17. Stereo Planes

  18. Field shaping tubes (Model by Bartoszeck Engineering)

  19. How are the wires held in place? • Using same method used by Icarus (according to A. Para) • Need to be tested Þ small scale model • One end is connected to the electronics and the other end is connected to the weight

  20. Stereo Wires • These are guided through a system of insulated pulleys. • Preliminary estimates indicate availability of space on the sides and at the bottom for the pulleys • Pulleys are staggered and pre-assembled in groups to panels to be located by rails attached to the tank • Prototype required

  21. Wire analysis • 150mm dia. stainless steel wire • Max. wire length = 125 ft = 38 m • Wire tension achieved by 1.3kg weight • Max. stereo wire “bowing” (deflection) is 0.38 in = 1 cm • Max. wire elongation = 5.4 in = 14 cm

  22. Integration of detector into tank structure • Among the options, an analysis was made of the flat roof case • Wire load is supported by space frames (trusses) at the top • Trusses are supported by inner wall • Inner wall also supports horizontal loads from wires

  23. 3D model – space frame detail(Model By Chuck Crimm / FNAL)

  24. Example – loading and wall thickness

  25. Example - FEA: hydrostatic load only

  26. Example - FEA: boundary conditions

  27. Example - FEA: static / max. shear

  28. Example - FEA: linear buckling / B.L.F.

  29. Integration of detector into tank structure (cont.) • Preliminary analysis indicates feasibility of flat roof and load supported by inner shell • More loading cases need to be studied • Subsequent more detailed analysis is needed

  30. Fermilab Liquid Argon Experiments

More Related