– GTK Working Group Meeting –

GTK Cooling: Status of the Micro-Channel OptionFeb 2nd 2010

1/21

GTK COOLING:STATUS OF THE MICRO-CHANNEL OPTION

Paolo Petagna (CERN, PH/DT)

On behalf of: Jérôme DAGUINRaphael DUMPSAlessandro MAPELLIJérôme NOËLGeorg NÜßLEPaolo PETAGNA

– GTK Working Group Meeting –

GTK Cooling: Status of the Micro-Channel OptionFeb 2nd 2010

2/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 OptionFeb 2nd 2010

3/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 OptionFeb 2nd 2010

4/xx

FUTURE POTENTIAL APPLICATIONS IN HEP

• Very low X0 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 OptionFeb 2nd 2010

5/xx

WHY TARGETING THE NA62 GTK?

1. Extremely aggressive X0 specifications2. 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 OptionFeb 2nd 2010

6/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 OptionFeb 2nd 2010

7/xx

PROPOSED PROCEDURAL MATRIX

500 m Pyrex

500 m Si

500 m Pyrex

500 m Si

500 m Pyrex

300 m Si

300 m Si

300 m Si

50 m Si (thinned)

100 m Si (thinned)

Fluid distribution / recollectionChannel optimal sizeHeat transfer from chips/sensorTemperature uniformity

Silicon on Silicon bonding

Pressure issuesHandling issues

C6F14 vs. CO2

– GTK Working Group Meeting –

GTK Cooling: Status of the Micro-Channel OptionFeb 2nd 2010

8/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 21-25 2009

50 x 50 m section

– GTK Working Group Meeting –

GTK Cooling: Status of the Micro-Channel OptionFeb 2nd 2010

9/xx

CFD SIMULATIONS AT EPFL – 2: C6F14 VS. CO2

– GTK Working Group Meeting –

GTK Cooling: Status of the Micro-Channel OptionFeb 2nd 2010

10/xx

µ-CHANNEL PROTOTYPES PRODUCED - 1

– GTK Working Group Meeting –

GTK Cooling: Status of the Micro-Channel OptionFeb 2nd 2010

11/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 OptionFeb 2nd 2010

12/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 OptionFeb 2nd 2010

13/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 OptionFeb 2nd 2010

14/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 OptionFeb 2nd 2010

15/xx

TEST SET-UP FOR C6F14 COOLING: P&I

– GTK Working Group Meeting –

GTK Cooling: Status of the Micro-Channel OptionFeb 2nd 2010

16/xx

TEST SET-UP FOR C6F14 COOLING: PREPARATION

– GTK Working Group Meeting –

GTK Cooling: Status of the Micro-Channel OptionFeb 2nd 2010

17/xx

FIRST TEST SET-UP FOR CO2 COOLING: AVAILABLE

PRESSURE GAUGE

METERING VALVE

OPTIONAL

CAPILLARY TUBE

DETECTOR TUBE WITH ELECTRIC HEATING

MASSFLOW METER

CO2 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 OptionFeb 2nd 2010

18/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 OptionFeb 2nd 2010

19/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 OptionFeb 2nd 2010

20/xx

LONG TERM: A POSSIBLE FUTURE EVOLUTION?

?

But a rational approach is to move step by step towards intermediate useful objectives…