1. P. Sutcliffe Liverpool University
NA62 Concept Design
P. Sutcliffe
Liverpool University

2. CEDAR Concept

3. Test Box Insulated box 42cm x 40cm x 32cm high x 3.5cm wall
Used to test the cooling of the PCBs and ambient temperature rise.
Compare with FE results.

4. Cooling Arrangement
PCB fan with heat sink used to cool a copper cooling block
Copper heat sink screwed to cooling block with 4 BPC5 Resistors producing 5W heat each.
Testing at Liverpool in the past shows we can load them up much higher.

5. FE Analysis using ANSYS
Copper Heat Sink
K=386 W/m.K
Copper Cooling Block
K=386 W/m.K
Applied cooling to this face 20ºC
Thermal Grease
K=2 W/m.K
Resistor Glue
K=1 W/m.K
Alumina 5W
K=24 W/m.K

6. ANSYS Results
Mean Chip Temp
26ºC

7. Space Frame Design
Standard 20mm Bosch Profile.
Easy Assembly
Cheap

8. Sector Prototype

9. Light Guide Ideas.. Made from Aluminium or Stainless Steel
Prototype manufactured using the Wire Eroder at Liverpool
Chemically polished

10. Electronics and Cooling
N2 in
Water in
Water out
Water cooling at around +20°C
N2 temperature controlled with cooling block attached to water cooling block
Cooling and N2 to be manifolded around all 8 modules.
Swagelok fittings to be used
N2 Out

11. Carbon Fibre at Liverpool
Carbon Fibre Workshop run by Peter Cooke
Mould manufacture
Honeycomb and Rohacell core experience
Woven Cloth and UD high modulus materials
LHCb VELO Pedestal
ATLAS Upgrade CF/Honeycomb cooled stave

12. Carbon Fibre Box Carbon Fibre Box Proposal Carbon Skins
Nomex or Rohacell core
Total wall thickness 10mm

13. Further Work… Work towards a fully functioning prototype
Look into production techniques of light guides…wire eroding and chemical polishing
FE Analysis of Cooling
Carbon box prototype manufacture