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V. Carassiti - Princeton (USA) 9-13/01/2003

1

BABAR

IFR UPGRADE

DETECTOR ASSEMBLINGAND

MOUNTING


2

DETECTOR LAYOUTEXPLODED


3

DETECTOR LAYOUTASSEMBLED


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IAROCCI TUBETUBE MATERIAL : NORYL OR PVCTHE TUBE IS NOT SELF SUPPORTING


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RIB• RIB MATERIAL : STEEL• NUMBER OF RIBS : TO BE OPTIMIZED DEPENDING ON DETECTOR’S EFFICIENCY AND

STIFFNESS REQUIRED• ASSUMING A RIB OF 1 MM THICK FOR EACH TUBE, THE TOTAL LENGTH NEEDED IS

ABOUT 8000 m; THE CORRESPONDING WEIGHT IS 1260 Kg AND THE COST = 3.6*1260 = 4536 € (20% VAT INCLUDED)


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DETECTOR’S STIFFNESSTHE HELP OF THE RIBS


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GLUEING – PHASE 1

THE RIB IS GLUED ON THE TUBE’S SIDE


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GLUEING – PHASE 2

• THE DETECTOR’S MODULE IS ASSEMBLED


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GLUEING – PHASE 3

• STRIPS, GROUND, SIGNAL PCB AND INSULATOR FOILS ARE ASSEMBLED• THE TOTAL THICKNESS IS ABOUT 1 MM


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GLUEING – PHASE 4

• STRIPS, GROUND, SIGNAL PCB AND INSULATOR FOILS ARE GLUED ON THE TUBES


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DETECTOR’S VERTICAL STIFFNESS


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MOUNTING AND DISMOUNTING THE DETECTOR

THE STRIPS FOIL GOES IN TO THE GAP (SLIDE 13); A PROPER TOOLING KEEPS IT IN SHAPE AND PLACE

THE MODULES OF THE DETECTOR ARE INSERTED ONE BY ONE FROM THE BOTTOM TO THE TOP, THE NEXT SLIDING ON THE PREVIOUS ONE (SLIDES 14, 15)

EACH MODULE CAN BE HELD ON BOTH EDGES, WHICH ALLOWS THE LIFTING AND THE ADJUSTMENT.

WHEN THE CORNER PIECES ARE MOUNTED THE DETECTOR DISASSEMBLY IS STILL POSSIBLE AFTER THE CENTER PIECES REMOVAL (SLIDE 16); THE PROCEDURE IS THE FOLLOWING: 1) LIFTING THE UPPER MODULES 2) EXTRACT THE CENTRAL MODULES 3) IN THE MIDDLE OF THE GAP THERE’S THE SPACE TO LOWER OR LIFT THE OTHER MODULES.AND REMOVE THEM.

THE OPERATION OF ASSEMBLY AND DISASSEMBLY NEED A TOOLING, HOLDING AND HANDLING THE MODULES OF THE DETECTOR.


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INSERTING THE STRIP FOIL• THE STRIP FOIL SLIDES INTO THE GAP• A TOOLING HOLDING AND MOVING THE FOIL IS NEEDED


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INSERTING THE DETECTOR - 1


15

INSERTING THE DETECTOR - 2


16

EXTRACTING THE DETECTOR


17

THE LAYER IN PLACE

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