Barrel Calorimeter Support Mechanism

1
Barrel Calorimeter Support Mechanism

• Two designs are proposed for review
• Design1.
• Individual module (Segment) of the Barrel
  Calorimeter is placed inside the magnet with the
  help of a support structure holding the segment
  inside the magnet
• Secure the Segment at 4 locations along the 4m
  length with bolts running all the way through the
  6 filler plate, the ring-Girder and to the
  helical coil mounted inside the Aluminum segment
  of the Barrel
• Place the next segment, secure it with the bolts
  and repeat the above procedure for all the 46
  remaining segments
• A total of 192 bolts are required to hold the 48
  individual segments of the Barrel calorimeter(48
  bolts at one location to hold the segment)

2
Barrel Calorimeter Assembly Procedure
Coil 1
Step1. Coil 1 inserts into the Iron yoke1
Ring-Girder
Step2. 6 inch Iron plate and the Ring girder is
bolted to the yoke
Step3. Similarly all the other 4 Iron-yokes,
coils and Ring-Girders are positioned in place
Click for the next slide
Iron-Yoke1
3
Coil 1
Barrel Calorimeter Assembly Procedure
Step1. Coil 1 inserts into the Iron yoke1
Step2. 6 inch Iron plate with the Ring girder is
bolted to the yoke
Step3. Similarly all the other 3 Iron-yokes,
coils and Ring-Girders are positioned in place
6 Inch Plate
Rollers
Ring-Girder
Iron-Yoke1
4
Coil
6 Inch Plate
Barrel Calorimeter
Iron Yoke
Ring Girder
Rollers
5
Heli-coil insert in the aluminum plate
Cut To accommodate the vacuum port
48 Threaded Rods holding the 48 Barrel
Calorimeter modules
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-Design 2

• This design involves assembling the barrel
  Calorimeter outside the magnet
• Individual modules of the barrel calorimeter are
  assembled inside the 2cm thk carbon-fiber
  cylinder supported by a structure
• The upper modules are bolted to the carbon-fiber
  cylinder
• The cylinder is rolled into the magnet on rollers
  fixed to the ring-girder
• 10 tones Hilman-rollers are located at three
  points on the circumference of the ring-girder
• This option of assembling the barrel calorimeter
  provides us ample amount of time to assemble the
  barrel in par with the hall construction
• Reduces the labor involved in fixing the 192
  threaded rods into the barrel and extending it to
  the out-side of the filler plate
• 10 threaded rods are installed to hold the
  cylinder and the Barrel Calorimeter in place once
  it has been assembled in the magnet

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Carbon-Fiber Cyc
HELI-COIL INSERT
SUPPORT STRUCTURE HOLDING THE CARBON-FIBER CYC
SETUP FOR ASSEMBLING THE BCAL OUTSIDE THE MAGNET
9
R65cm
R92.5
3 Rollers Bolted to the Ring-girder
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