– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /21 GTK COOLING: STATUS OF THE MICRO-CHANNEL OPTION Paolo Petagna (CERN, PH/DT) On behalf of:Jérôme DAGUIN Raphael DUMPS Alessandro MAPELLI Jérôme NOËL Georg NÜßLE Paolo PETAGNA

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx SUMMARY Perspectives for µ-channel cooling in HEP The proposed approach for the NA62 GTK Status of the R&D Next steps MAINLY “WORK IN PROGRESS”

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx WHY µ-CHANNEL COOLING NOW? Example: CMOSAIC project run by EPFL (2 labs), ETHZ (2 labs), University of Madrid, Boston University, IBM Zurich. CERN Presently discussing scientific partnership

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx FUTURE POTENTIAL APPLICATIONS IN HEP Very low X 0 layers for SHLC pixel detectors; “Trigger Layers” (first-level trigger) in SHLC Trackers ILC/CLIC detectors First potential target candidate: NA62 GTK

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx WHY TARGETING THE NA62 GTK? 1.Extremely aggressive X 0 specifications 2.Test case for the integration with electronics 1.Simple “system configuration” (3 independent modules) 2.Allows for concentrating the efforts on local thermal management

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx “STEP 0”: CREATE A NETWORK OF COLLABORATIONS EPFL – LMIS4 collaborating now on  -fabrication EPFL – LTCM collaborating now on  -fluidics + heat & mass transfer UCL – ELEC/DICE (SOI & MEMS) discussing possible collaboration VTT let us know their interest through PH/ESE: need to contact them IBM Research – Zurich Personal contact with B. Michel + CMOSAIC SLAC Developing in this moment a very similar line of R&D

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx PROPOSED PROCEDURAL MATRIX 500  m Pyrex 500  m Si 500  m Pyrex 500  m Si 500  m Pyrex 300  m Si 50  m Si (thinned) 100  m Si (thinned) Fluid distribution / recollection Channel optimal size Heat transfer from chips/sensor Temperature uniformity Silicon on Silicon bonding Pressure issues Handling issues C 6 F 14 vs. CO 2

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx CFD SIMULATIONS AT EPFL – 1: CHANNEL GEOMETRY J. Thome et al. Two-Phase Cooling of Targets and Electronics for Particle Physics Experiments, TWEPP 09, Paris, Sep x 50  m section

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx CFD SIMULATIONS AT EPFL – 2: C 6 F 14 VS. CO 2

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx µ-CHANNEL PROTOTYPES PRODUCED - 1

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx µ-CHANNEL PROTOTYPES PRODUCED - 2 Pyrex 500 µm Silicon 500 µm Anodic Bonding

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx IDEAS FOR FLUID DISTRIBUTION/RECOLLECTION – 1: “CLAMP” SYSTEM Bulky Complex integration with electronics Holds pressure in the manifolds Allow immediately for thermo- fluid studies Size and mass can be reduced

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx IDEAS FOR FLUID DISTRIBUTION/RECOLLECTION – 2: NANOPORT ® CONNECTORS Lighter Easy integration Preferred choice

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx IDEAS FOR FLUID DISTRIBUTION/RECOLLECTION – 3: PRESSURE TESTS OF NANOPORT ® CONNECTORS Requires careful design and test of fluid distribution / collection

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx TEST SET-UP FOR C 6 F 14 COOLING: P&I

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx TEST SET-UP FOR C 6 F 14 COOLING: PREPARATION

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx FIRST TEST SET-UP FOR CO 2 COOLING: AVAILABLE PRESSURE GAUGE METERING VALVE OPTIONA L CAPILLAR Y TUBE DETECTOR TUBE WITH ELECTRIC HEATING MASSFLOW METER CO 2 BOTTLE WITH PLUNGER CONCENTRIC TUBE HEAT EXCHANGER VENT TO ATMOSPHER E PROPORTIONAL RELIEF VALVE WATER BATH HEATER

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx THERMAL CONTACT STUDIES PRESENT BENCHMARK: ME7159 by AI Technology (USA) diamond-loaded epoxy glue with thermal conductivity11.4 W/mK R&D contract in preparation with CNR Italy (Institute for Composite and Biomedical Materials): Study of thermal conductive adhesives obtained by doping Araldite 2011 and Silicone VRT Carbon Nano-Tubes Diamond Nano-Powder Metal Nano-Wires

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx NEXT STEPS Tackle integration problems (towards electronics and towards outside) Start C6F14 studies – room temperature Continue C6F14 studies – low temperature Proceed with Silicon on Silicon bonding technique Start CO2 studies Move towards thinned assembly

– GTK Working Group Meeting – GTK Cooling: Status of the Micro-Channel Option Feb 2 nd /xx LONG TERM: A POSSIBLE FUTURE EVOLUTION? ? But a rational approach is to move step by step towards intermediate useful objectives…