Pixel progress, mechanical

1
Pixel progress, mechanical

• Now have professional mechanical engineering
• Eric Anderssen (LBNL Engineering)
• Major role in the ATLAS Pixel program
• Developed and built low mass carbon composite
  structures for the ATLAS pixels
• Built up the LBNL carbon composite shop
• Eric phasing into HFT as ATLAS effort ramps down
• Eric will be lead engineer on the pixels and will
  be addressing HFT support and integration as well
  as pixels
• Steve Ney (ARES Corporation, Los Alamos) others
  at ARES
• Experience with silicon detector support,
  composites, working on GLAST while with HYTEC
• Has worked with our PHENIX colleagues at Los
  Alamos Lab
• Has started working with us on silicon support

2
Mechanical concept

• will show latest thinking on this
• expect changes as Eric and Steve become engaged

3
Pixel support structure
End view
8 cm radius
2.5 cm radius
Inner layer Outer layer
ALICE style carbon support beams (green)
4
Pixel placement concept

• Detector assembly slides in on rails
• Parallelogram hinges support the two detector
  halves while sliding
• Cam and follower controls the opening of the
  hinges during insertion and extraction
• Detector support transfers to kinematic dock when
  positioned at the operating location
• Hinge structures must be light weight

pixel support hinges
sliding carriage
kinematic dock securing final detector position
slide rails
spring loaded cam followers and linear cam
5
D tube support
ISC
power and signal wire bundles, one bundle per
ladder
insertion hinges
carbon D tube for support and cooling air piping
6
more carbon composite D tube
kinematic support plate
sector mounts, 5 per clam shell
7
Two sector patch, installation summer 2010