EC Structure Review IFICValencia s LHC OXFORD 17062010

? ? ? EC Structure Review IFIC-Valencia s. LHC OXFORD 17/06/2010 David Santoyo 1

Presented at Nikheff Ws 2008 EARLY MODEL: Mass reduction target - Petals supported by a wheel - Hub and rim of the wheel sustained by a set of radial rods s. LHC OXFORD 17/06/2010 David Santoyo 2

Presented at Nikheff Ws 2008 Overlap in Φ with upper/lower petals Two Control Cads per petal on same side CONTROL CARD LOCATION FIXED: - Control Card on the side. No space left at the top (outer radius) - Control Card at the bottom difficulties services connections. - “T-shape” difficulties Control Card cooled down with the return pipe s. LHC OXFORD 17/06/2010 David Santoyo 3

Presented at LBL Mech-Ws 2009 ”End insertion”-like concept is complicated for petals: - Control cards on the side “only 1 rail? ” - There is no mov. constrain in z (No disk) - Rings separate petals in z even more (Rods Ø) - Build accuracy requirements: r-φ=50 um r=200 um z=500 um Stiff enough? At least Inner Cylinder (Cone shaped) required s. LHC OXFORD 17/06/2010 David Santoyo 4

Presented at LBL Mech-Ws 2009 This would improve considerably the stiffness but… s. LHC OXFORD 17/06/2010 David Santoyo 5

Presented at LBL Mech-Ws 2009 What about services? ? Risky: multiple obstacles with NO “end-insertion”-like concept s. LHC OXFORD 17/06/2010 David Santoyo 6

Services: Presented by Neal D. Hartman (Jan. 2009) Characteristic, Repeated 1/16 Arc Segment EC Service Module Connection Space SB EC Pix PP 1 PCB’s Poly Moderator Supplement s. LHC OXFORD 17/06/2010 David Santoyo 7

16 Service channels for End. Cap Characteristic, Repeated 1/16 Arc Segment SB EC Pix From Ian Wilmut concept applied to petals s. LHC OXFORD 17/06/2010 David Santoyo 8

16 Service channels for End. Cap A single “rail” makes endinsertion easier until the very end of the assembly process… Single guide pin This gap can be reduced depending on the piping and cabling connectors. s. LHC OXFORD 17/06/2010 David Santoyo 9

Services: Presented by Christophe Bault (Feb. 2009) R=974 R=1007 s. LHC OXFORD 17/06/2010 David Santoyo 10

CMS Benchmark s. LHC OXFORD 17/06/2010 David Santoyo 11

CF Inner Cylinder 8 support bars constrain disks Apertures on Outer cylinder to permit services exit Inner cylinder with 4 different diameters to constrain disks and sustain petals Master disk supports entire structure s. LHC OXFORD 17/06/2010 David Santoyo 12

CFRP-KOREX Disks 1. - Master Disk + Support bars + Inner cylinder 2. - Disks are assembled into the structure. s. LHC OXFORD 17/06/2010 David Santoyo 13

CF Frames s. LHC OXFORD 17/06/2010 David Santoyo 14

Lateral Support Beams s. LHC OXFORD 17/06/2010 David Santoyo 15

Services Support Rings s. LHC OXFORD 17/06/2010 David Santoyo 16

(4/16) Rows of Petals: Insertion s. LHC OXFORD 17/06/2010 David Santoyo 17

(4/16) Rows of Petals: Services and Testing 40 petals from 160 (25%) s. LHC OXFORD 17/06/2010 David Santoyo 18

(12/16) Rows of Petals: Insertion s. LHC OXFORD 17/06/2010 David Santoyo 19

(12/16) Rows of Petals: Services and Testing s. LHC OXFORD 17/06/2010 David Santoyo 20

ENDCAP Envelope s. LHC OXFORD 17/06/2010 David Santoyo 21

Services & cabling Services estimation includes: -Opto fibers x 18 -HV cabling x 18 -LV cabling x 2 -Inlet and Outlet capillaries -DCS x 18 -Al service channel Capillaries Total per petal (g/mm) 0, 39502609 Total per Disk (g) Services Disk 1: from z: 2956 mm to z: 1376 mm 19972, 5192 Services Disk 2: from z: 2956 mm to z: 1476 mm 18708, 43571 Services Disk 3: from z: 2956 mm to z: 1744 mm 15320, 69194 Services Disk 4: from z: 2956 mm to z: 2141 mm 10302, 28047 Services Disk 5: from z: 2956 mm to z: 2791 mm 2085, 737765 Total 5 Disks (g) s. LHC OXFORD 17/06/2010 66389, 66509 David Santoyo 22

Electrical & Cooling Services Interface Electrical Connectors on top to improve accessibility. Also located at the center to optimize the area for the Control Card on the side. The aim is to reduce the petal width as much as possible. s. LHC OXFORD 17/06/2010 David Santoyo 23

Services Connections 2 D-Layout: conflictive area at rails CONNECTORS NEED TO BE DEFINED: AT MANIFOLDING PIPES SHOULD HAVE THE SAME IMPEDANCE 1. 4 m s. LHC OXFORD 17/06/2010 David Santoyo 24

Accessible area after services 40 petals from 160 (25%) +12 (32, 5%) +12 (40%) 1. 4 m s. LHC OXFORD 17/06/2010 David Santoyo 25

ENDCAP Envelope: Substructure #1 Support Frames Support Beam Inner Cylinder s. LHC OXFORD 17/06/2010 Disks supports David Santoyo 26

ENDCAP Envelope: Substructure #2 Rings Services Channels s. LHC OXFORD 17/06/2010 David Santoyo 27

Petal Envelope Dimensions Only element to determine Inner diameter of ring >>>>> 12 mm GAP? ? ? 7 mm GAP? ? ? >>>>> s. LHC OXFORD 17/06/2010 David Santoyo 28

9 Rings for Services; Weights and Clearances TOTAL nº RINGS = 9 x 2 = 18 (TOP+BOT) ≈ 4. 4 Kg → Openings ← ≈74 mm ← ≈242 mm ≈ 4. 0 Kg → ← ≈88 mm ≈ 3. 1 Kg → ← ≈88 mm ← ≈74 mm ≈ 2. 2 Kg → ← ≈74 mm TOTAL SERVICES = 33. 6 x 2 = 67. 2 Kg (TOP + BOT) s. LHC OXFORD 17/06/2010 David Santoyo 29

2 Models considered… Real model reinf. inserts Real model 12 mm GAP? -> Real model with openings Equivalent model 12 mm GAP? s. LHC OXFORD 17/06/2010 David Santoyo 30

Results and Conclusions… For the real model without inserts, the areas where the load is distributed provide about 80% of the deflection because there is not enough rigidity at those areas. This is why the equivalent model is done to avoid the previous situation. The model with Inserts shows the best data it is possible to get, the load is sheared between all nodes in contact with the inserts areas. To achieve a deformation under 5 mm is not impossible, but some safety factor must be also considered and it is difficult with current estimations to understand if already there is a safety factor included at the load or not. Results: Outer diameter: 1. 007 mm 12 mm GAP Inner diameter: 0. 979 mm Results: Outer diameter: 1. 007 mm GAP Inner diameter: 0. 974 mm Material Properties Deformation results: Units in mm Carbon Fiber: XN 50 -A Matrix: RS-3 Honeycomb: KOREX 5/32 -2. 4 s. LHC OXFORD 17/06/2010 David Santoyo 31

Next Future… The structure frames are the only element which affects to the dimension for the inner ring diameter. Rings are part of the full structure and if frames could pass through the rings by small openings -> Next idea to develop! …This concept would make possible to reduce rings width allowing bigger clearances to extract petals. Opening for services Opening for frames Service Ring s. LHC OXFORD 17/06/2010 David Santoyo 32