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 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 Iron-Yoke1 Ring-Girder 6 Inch Plate 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 R65cm R92.5