A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
D0 Silicon Upgrade: End Calorimeter Transfer Bridge Design and Installation Procedures
The North Endcap Calorimeter (NEC) is to be moved from the clean room to the north sidewalk in preparation for the final installation on the DO detector center beam. In order to make this move, the cable bridge must be 'flattened' and the NEC lifted to move over it. The detector is moved west, approximately 24 feet, while the moveable counting house remains stationary. This movement allows the cable bridge to 'flatten' i.e. become horizontal. The cable bridge lowering is steadied and stabilized by 7.5 ton hoist mounted on the moveable counting house. By moving the detector to lower the bridge, a vacancy has been created in the pit that must be filled to the level of the clean room rail elevation. This filler will consist of concrete shield blocks, stacked in two rows. These rows are spaced appropriately to match the wheel base of the EC transporter. A steel plate is placed on top of each row of shield blocks and leveled to the elevation of the clean room rails. Steel plates will be installed and leveled on the north sidewalk similar to those used on the south sidewalk for the CC installation. These plates are used as rails for the Hilman rollers, bearing surfaces for shim blocks used during lifting and anchors for holding the transporter extension units and the transfer bridge. After the plates are installed, the transfer bridge is put in place, spanning the cable bridge, shimmed and leveled. The transporter extension units are positioned next to the transfer bridge on the north sidewalk. With the completion of this prep work, the actual transfer of the NEC from the clean room can begin.
D0 Silicon Upgrade: End Calorimeter Transfer Bridge Design and Installation Procedures
The North Endcap Calorimeter (NEC) is to be moved from the clean room to the north sidewalk in preparation for the final installation on the DO detector center beam. In order to make this move, the cable bridge must be 'flattened' and the NEC lifted to move over it. The detector is moved west, approximately 24 feet, while the moveable counting house remains stationary. This movement allows the cable bridge to 'flatten' i.e. become horizontal. The cable bridge lowering is steadied and stabilized by 7.5 ton hoist mounted on the moveable counting house. By moving the detector to lower the bridge, a vacancy has been created in the pit that must be filled to the level of the clean room rail elevation. This filler will consist of concrete shield blocks, stacked in two rows. These rows are spaced appropriately to match the wheel base of the EC transporter. A steel plate is placed on top of each row of shield blocks and leveled to the elevation of the clean room rails. Steel plates will be installed and leveled on the north sidewalk similar to those used on the south sidewalk for the CC installation. These plates are used as rails for the Hilman rollers, bearing surfaces for shim blocks used during lifting and anchors for holding the transporter extension units and the transfer bridge. After the plates are installed, the transfer bridge is put in place, spanning the cable bridge, shimmed and leveled. The transporter extension units are positioned next to the transfer bridge on the north sidewalk. With the completion of this prep work, the actual transfer of the NEC from the clean room can begin.
D0 Silicon Upgrade: End Calorimeter Transfer Bridge Design and Installation Procedures
H. J. Stredde (author)
1991
20 pages
Report
No indication
English
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