EE End Cap Engineering

1
EE End Cap Engineering

• John Hill

2
Timescales

• Driven by
• Installation in late 06/early 07
• Long lead time for large mechanical items
• Parallel critical/near critical paths
• Large mechanical items
• Backplate/Positional Spacers
• Support Ring
• Environmental Shield Assembly

3
EE End Cap Layout
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EE End Cap Engineering

• ECAL End Cap Engineering Design Update
• General Assembly of End Cap (using 50 channel
  readout box units) 90 complete.
• Super Crystal positions fixed, positional spacers
  (super crystal seating elements) fixture to
  backplate now specified.
• Backplate with cooling circuit designed to 50
  channel scheme, inclusion of EE assembly and
  installation fixtures.
• Support Ring designed within parameters of EDR
  specification, accommodation for End Cap
  electrical/cooling patch panels, interface to HE
  as requested
• Environmental Shield Assembly currently being
  detailed with IHEP Protvino

5
EE Backplate

• EE Backplate (known details)
• - Major dimensions (radii, thickness).
• - Material (Al/Alloy)
• - Location and fixture of positional spacers
  (Super Crystals).
• - Assembly/Installation brackets fixing points.
• - Environmental Shield fixing points.
• EE Backplate (unknown details)
• - Super Crystals Slot positions (opening for SC
  electronics cable/connector and fibre optic
  monitoring.
• - Support system for Electronics and services
• - Backplate Cooling circuit (details of
  arrangement)

6
EE Support Ring

• EE/HE Interface Support Ring (current)
• - Detailed to 50-channel layout
• - Detailed with support fixtures to EE Backplate
  (with provision for insulation).
• - Provision for EE Services Patch Panel.
• - HE Integration fixtures as proposed layout
  (including shim).
• EE/HE Interface Support Ring (future)
• - Agreement on EE/HE Fixture
• - Design and arrangement (in particular depth)
  may change due to new design of electronics
  (effect on HE?).
• - Template requirement for fixture holes between
  EE-HE.

7
EE Environmental Shield Assembly

• EE Environmental Shield (current)
• - Layout/scheme of outer, inner, front shield
  produced by RAL, to within CMS/EE parameters,
  clearance to Super Crystals (outer, inner and
  front).
• - Detailed engineering and thermal analysis in
  progress by IHEP Protvino.