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