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CDC structure

CDC structure. Shoji Uno (KEK) July-8, 2009. Baseline Design. sBelle. Belle. Tentative drawing by Kohriki-san. Connection regions 1. Endplate and Outer cylinder. Main and Conical (Backward). Connection regions 2. Main and Conical (Forward). Back ward. Forward.

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CDC structure

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  1. CDC structure Shoji Uno (KEK) July-8, 2009

  2. Baseline Design sBelle Belle

  3. Tentative drawing by Kohriki-san

  4. Connection regions 1 Endplate and Outer cylinder Main and Conical (Backward)

  5. Connection regions 2 Main and Conical (Forward) Backward Forward

  6. Connection regions 3 Conical and Small cell Small cell and Inner cylinder

  7. Main parameters

  8. Calculation of deformation and etc • Deformation of Aluminum endplate • Thickness of endplate 10mm • Tension of field wire 120g  80g • Gravitational sag, Sense : 190mm(50g), Field:300mm(80g) • Unequal sag  Nane-san’s talk • Total tension ~4ton • Deformation  Yamaoka-san’s talk • Stress calculation • Thickness of outer cylinderCFRP：mm • Transition structure between endplate and outer cylinder • Bucking calculation for inner cylinder • Larger tension for many wires ( ~400kg) • Yamaoka-san’s talk

  9. Weight • Endplate • Al, Thickness : 10mm • 110kgx2 = 220kg • Outer Cylinder • CRRP, Thickness : 5mm • 210kg • Electronics Board • G10, 48ch/board • 0.3kgx315 = 95kg

  10. Wire configuration • So far, • 8(A),6(U),6(A),6(V),6(A),6(U),6(A),6(V),8(A), • 58 layers in total • But, • Readout board64ch/board 16x4 No good assignment • 48ch/board 16X3 • 8(A)  2(A)+6(A) inner most super layer • 2(A)  special treatment 160x2=320 : 48x7=336 • 8(A)  6(A) outer most super layer • 56 layers in total  Good assignment • Other good idea is highly welcome.

  11. Readout board space Test board 16ch  48ch(~300boards in total) 17.5cm Should be fit in volume 20cm

  12. My Personal Plan for Construction

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