A study on D0 Run2b stave structural performance

Lanfranco, Giobatta ; /Fermilab

Fermi National Accelerator Laboratory

关键词: Building Materials;    Experiment-Hep, Instrumentation;    Design;    Performance Experiment-Hep, Instrumentation;    Flexibility;   

DOI  :  10.2172/15017258
RP-ID  :  FERMILAB-TM-2299-E
RP-ID  :  AC02-76CH03000
RP-ID  :  15017258

美国|英语

来源: UNT Digital Library

【 摘 要 】

Two different structural solutions have been proposed and studied for the D0 Run2b stave (Figure 1 and Figure 3). The way the stave structural stiffness is achieved in both designs is essentially the same: the structural material is displaced as far as possible from the neutral axis in order to increase the bending moment of the stave. The agreement of the measured data with what has been theoretically predicted is excellent. The C channel stave with dog-bones glued on top of the sensor (stave No.2) has outperformed the other mockups with a predicted sag of 51 {micro}m for a distributed load of 2.28 N/m [0.013 lbf/in] and a consequent natural frequency of 89.2Hz. The other three C channel staves with the dog-bones not glued on the sensor have a bending stiffness that is -19.0%, -10.8%, +4.0% of that of stave No.2, being 11.0%, 7.8%, 15.1% lighter respectively. An optimized stave structural proposal with 130.5% of the design stiffness within the mass budget is presented at the end of this paper.