Speaker
Description
In the ATLAS barrel strip system silicon strip modules are mounted on local supports (staves). The staves are supported on four large concentric carbon fibre support cylinders. During the integration the cylinders will first be installed within the Outer Cylinder that contains all of the Inner Tracker (ITk), and the staves will then be inserted into this structure from both ends. Insertion will be guided by a set of rails that are temporarily installed for this process.
The mechanical interface between the staves and the cylinders is provided by a system of ULTEM brackets, which also support the rails during the insertion. The position of the stave is defined by a cone-on-ball interface at the center of the support cylinders, and allows for differential thermal expansion of the staves and the support cylinders. Once the staves are in place they are secured in place by a locking cam for each bracket.
The mounting brackets are glued onto the support cylinders using precision jigs. Dressing of the support cylinders is currently under way. We have completed this for the largest cylinder (L3), and the gluing of brackets onto L2 is under way.
In this presentation we will present the design of this support system and the tooling for the dressing, the QA we performed in preparation of this assembly, and results and observations from this process.