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)
Barrel Calorimeter Assembly Procedure Coil 1
Iron-Yoke1
Step1. Coil 1 inserts into the Iron yoke1
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
Ring-Girder
Click for the next slide
Barrel Calorimeter Assembly Procedure
Step1. Coil 1 inserts into the Iron yoke1Step2. 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
Coil 1
Iron-Yoke1
Ring-Girder
6 Inch Plate
Rollers
Rollers
Iron Yoke
Coil
6 Inch Plate
Ring Girder
Barrel Calorimeter
48 Threaded Rods holding the 48 Barrel Calorimeter modules
Heli-coil insert in the aluminum plate
Cut To accommodate the vacuum port
-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
HELI-COIL INSERT
SUPPORT STRUCTURE HOLDING THE CARBON-FIBER CYC
Carbon-Fiber Cyc
SETUP FOR ASSEMBLING THE BCAL OUTSIDE THE MAGNET
3 Rollers Bolted to the Ring-girder
R65cmR92.5
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