Infrastructure for CO2 cooling in the CBM experiment at FAIR

Wolfgang Niebur and Johann M. HeuserGSI, Darmstadt, Germanyfor the CBM collaboration

18-Mar-2013 Work Package 13 - CO2 Cooling 1

18-Mar-2013 Work Package 13 - CO2 Cooling 2

Cooling method

• Evaporative CO2 cooling for the Silicon Tracking System (STS)

• Integrated 2-Phase Accumulator Controlled Loop

18-Mar-2013 Work Package 13 - CO2 Cooling 3

CBM Building

CBM experimentSTS

Underground hall:Length: 37 mWidth: 22 m Height: 17 m

CO2 plant

pipe length ~ 70 m

gas storage

18-Mar-2013 Work Package 13 - CO2 Cooling 4

CBM Building

CBM experimentSTS

Underground hall:Length: 37 mWidth: 22 m Height: 17 m

CO2 plant

pipe length ~ 70 m

gas storage

room height: ~ 3.70 m

18-Mar-2013 Work Package 13 - CO2 Cooling 5

Gas storage

18-Mar-2013 Work Package 13 - CO2 Cooling 6

Silicon Tracking SystemCooling requirement• 2.1M r/o channels • ~ 17k STS-XYTER ASICs• 2080 electronics boards à 20 W

in boxes of 10 at top & bottom of STS • total power dissipation:

2 × 21 kW = 42 kW