Alessandro Mapelli - µcool weekly - CERN 1

LHCb

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Alessandro Mapelli - µcool weekly - CERN 2

LHCb-1 #6918 inlets before dicing

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Alessandro Mapelli - µcool weekly - CERN 3

LHCb thermal tests• No vacuum chamber available• TRACI in 187• We need a heater..

– Thin SS foils– Re-usable bloc– Pelletier– Small resistors on Cu plate– IBL Kapton foils custom foils (20 x 20 mm)

• Use theirs or order more?

– IBL Silicon dummies with silver film, one Pt-100 and wires soldered (20 x 40 mm)

– Silicon thermal mock-ups with Simone Traverso !! (meeting with Jan, Andrei asap)

• Who should prepare the devices for testing– Nanoports and interface with Swagelok connectors and SS capillaries (Jerome

Noel)– Heater with thermal paste on top of cooling plate (who does it??)

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Alessandro Mapelli - µcool weekly - CERN 4

NA62

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Alessandro Mapelli - µcool weekly - CERN 5

NA62 Dual Inlet wafer SOI-353• Channels and manifolds have been etched• After stripping the hard masks (SiO2, SiN), the

surface was contaminated

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Alessandro Mapelli - µcool weekly - CERN 6

NA62 Dual Inlet wafer SOI-353• Contamination seems to be passivation

polymers from DRIE..

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Alessandro Mapelli - µcool weekly - CERN 7

In the coming days• Tuesday: RCA cleaning + bonding• Litho Pool #2• Etching Hard mask Pool #2• Litho Inlets• Etching Inlets• KOH etching pools• Dicing latest end of next week…• Connectors• Hydraulic test w/out and w/ vacuum• Then we should decide which heater we should use..

– Ceramics thermal mock-ups– Thermal mock-ups from Aurélie Pezous could be delivered when?– Integration to PCB could be done with both

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Alessandro Mapelli - µcool weekly - CERN 8

DRIE

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http://www.iue.tuwien.ac.at/phd/ertl/node68.html

Alessandro Mapelli - µcool weekly - CERN 9

ALICE

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Alessandro Mapelli - µcool weekly - CERN 10

ALICE• Testing could start at the end of winter shutdown

(14th of march)• Which plant should we use?– DSF cooling plant will be tested for an SPD spare sector

which should be commissioned for the next shutdown• 2 loops are available and only one is needed by SPD… to be

discussed with them.

– Crystal Palace cooling plant• Modifications required (2 hrs) + testing of the plant (1 day)• Andrea Francescon

– will do the modifications next week– Will start working on the microfabrication asap (next monday pm?)

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