cylinders or space frames ?
DESCRIPTION
Cylinders or Space Frames ?. David Hitlin September 16, 2005. Alternatives to rohacell shells. Tensioned fibers (JA) Light carbon fiber space frame (DH) More material than naïve tension system, but more than shells Still much less than silicon+cables+cooling - PowerPoint PPT PresentationTRANSCRIPT
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Cylinders or Space Frames ?
David Hitlin
September 16, 2005
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Alternatives to rohacell shells Tensioned fibers (JA) Light carbon fiber space frame (DH)
More material than naïve tension system, but more than shells Still much less than silicon+cables+cooling
Should be very rigid and self-supporting Facitates gas cooling Permits use of lampshade endcaps
Used in BABAR vertex detector (much smaller scale) Greatly reduces area of silicon to cover a given solid angle Reduces multiple scattering by increasing average andle of
incidence for charged particles Facilitates access
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http://f.home.cern.ch/f/feofilov/public/TDR-HTM/its1-1.htm
ALICE uses carbon fiber space frames
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An example configuration
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First shot at a 2D finite element analysis
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Components Hollow tubes
Molded ferrules
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Next Optimize a 2D planar structure Extend to a 3D cylinder and a conical endcap Detail design
Mounting, handling of silicon modules Potential integration of cooling into structural tubes Cable routing Mounting structures
Explore fabrication methods