Barrel Calorimeter Support Mechanism
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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
Step1. Coil 1
inserts into the
Iron yoke1
Coil 1
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
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
Coil 1
6 Inch Plate
Rollers
Ring-Girder
Iron-Yoke1
Coil
6 Inch Plate
Barrel
Calorimeter
Iron Yoke
Rollers
Ring Girder
Heli-coil insert in
the aluminum
plate
Cut To
accommodate
the vacuum port
48 Threaded Rods holding the
48 Barrel Calorimeter modules
-Design 2
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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
Carbon-Fiber Cyc
HELI-COIL INSERT
SUPPORT STRUCTURE
HOLDING THE
CARBON-FIBER CYC
SETUP FOR ASSEMBLING THE BCAL OUTSIDE
THE MAGNET
R92.5
R65cm
3 Rollers Bolted to the Ring-girder