Technical note Open Access
CMS Trapezoidal GEM Foils Structural Analysis
G. Raffone
The demand of large area GEM detectors requires extreme working conditions of the layered foils from structural point of view; larger area need higher biaxial tensile loads to overcome large deflections and the related stresses may exceed the copper yield limit just around the holes; the present work shows that for a trapezoidal CMS GEM foil (W=1040 mm; L1=530 mm; L2=345 mm) the sag due its own weight is about f =28.6 μm (electrostatic loads not included) for a tensioning of S=1 N/mm; the related stresses are lower than the yield only in a biaxial load. Numerical results are from ANSYS Educational v.10 [1] and their level of accuracy is very good when compared to some theoretical and experimental results.
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- Publication date:
- September 20, 2010
- DOI:
-
- Keyword(s):
- transversely isotropic multilayer, homogenization
- Communities:
- License (for files):
- Creative Commons Attribution 4.0