1. AIDA 1 Mezzanine board Resistors and capacitors near the ASiCs have now been relocated to the underside of the PCB. Cooling pads have been extended.

2. 2 AIDA Cooling pads have been extended.

3. AIDA 3 Light-tight area Location pins This is to be assembled as a single unit

4. 4 AIDA

5. 5

6. 6 Quote for 30 Heatsink units Best Bidder – Senar Engineering £4690 £5395 inc VAT £180 ea. Prototype within 4 weeks of order placement, rest to follow.

7. Next parts to be ordered and quantities? AIDA 7

8. 8 Mechanically constructed

9. AIDA Thermal tests, 3 possibilities 1 st as previously discussed. N2 insulating volume, with N2 dewar providing cooled nitrogen for detectors Pros – inexpensive Cons - high cooling power required, may be difficult to accurately control detector temperature. Bottles, and dewars will have to be regularly refilled. Nitrogen insulated

10. AIDA 2 nd Option, replace N2 insulating volume with vacuum space. vacuum insulating volume, with N2 dewar providing cooled nitrogen for detectors, other options available Pros – lower cooling power required, N2 gas bottles not required accurate temperature control possible Cons – Likely another chamber will be required, 1mm wall aluminium to contain vacuum. – Need to check window strengths.

11. AIDA 3rd Option, 1mm rectangular can into vacuum chamber. Pass cold nitrogen up titanium pipes, rely on conduction to cool detectors. Pros – low cooling power required, N2 not required accurate temperature control possible. Likely to use different cooling techniques Cons – System not really designed for vacuum some checks need to made.