Superconducting Super Collider Laboratory, Gamma Electron Muon (GEM) Detector Support System and Chambers

United States

Completion

1993

SGH reviewed the modular concept for the muon detection chamber support system by others and developed a monolithic integrated structural support system that meets the aggressive physics performance requirements, including stringent alignment and tolerance requirements, and is less costly to build. The Gamma Electron Muon Collaboration (GEM) muon detection chamber support system consists of two cylindrical space frames, each nearly 18 m in diameter and 18 m long, housed in a cylindrical magnet. The structure provides support for the muon detection chambers. The trajectories of muons, along with the sagitta of the trajectories, are determined from the coordinates of points where muons pass through the detection chambers.

Scope | Solutions

In a span of a few months, SGH developed a new high-performance monolithic integrated concept for the muon detection chamber support system. The new concept simultaneously addressed and satisfied all the viable design criteria such as performance, stability, as well as ease of alignment, assembly, and maintenance access.

SGH's work involved not only development of concepts, but also significant analytical model studies, automated structural optimization, cost estimation, and scheduling. SGH also worked on the design optimization of the muon detection chambers and evaluated candidate structures. Constrained by extremely tight design tolerances for static and dynamic deflection and vibration, light weight, and precise geometry. SGH used optimization of structural performance using a finite element model of the muon chambers and their support structures.

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