Silicon-Based Tracking System: Mechanical Engineering and Design

The Silicon Tracking System(STS) is composed of silicon strip detectors arranged both in a cylindrical array and in an array of flatpanels about the interaction region. The cylindrical array denotes the central region and the flat panel arrays, which are normal to the beam axis, denote the forward regions. The overall length of the silicon array is 5.16 m, and the maximum diameter is 0.93 m. The Silicon Tracking SystemConceptual Design Report1 should be consulted for the body of analysis performed to quantify the present design concept. For the STS to achieve its physics goals, the mechanical structures and services must • support 17 m2 of silicon detectors and stabilize their positions to within 5 μm, • uniformly cool the detector system to 0°C, while potentially removing up to 13 kW of waste heat generated by the detector electronics, • provide up to 3400 A of current to supply the 6.5 million electronics channels, and • supply all control and data transmission lines for those channels.