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The Silicon Tracking System of the CBM at FAIR: detector development and system integration. A. Lymanets 1,2, E. Lavrik 1, H.-R. Schmidt 1 University of.

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Presentation on theme: "The Silicon Tracking System of the CBM at FAIR: detector development and system integration. A. Lymanets 1,2, E. Lavrik 1, H.-R. Schmidt 1 University of."— Presentation transcript:

1 The Silicon Tracking System of the CBM at FAIR: detector development and system integration. A. Lymanets 1,2, E. Lavrik 1, H.-R. Schmidt 1 University of Tübingen 1, Kiev Institute for Nuclear Research 2 KINR TIPP ’14, Amsterdam

2 Facility for Antiproton and Ion Research A. Lymanets - CO 2 Cooling for CBM STS - TIPP '144.06.14 2 magnets: 300 Tm bending power high-intensity DC beam: 10 9 ions/s at CBM max. beam energies:  heavy ions: 45 GeV/u  protons: 90 GeV 2012: World intensity record for low Charge State Heavy Ions (e.g., U 28+ )

3 CBM experiment 3 A. Lymanets - CO 2 Cooling for CBM STS - TIPP '144.06.14 Dipole magnet Ring Imaging Cherenkov Detector Resistive Plate Chambers (TOF) Electro- magnetic Calorimeter S ilicon T racking S ystem Projectile Spectator Detector (Calorimeter) Micro Vertex Detector

4 Tracking challenge 4 A. Lymanets - CO 2 Cooling for CBM STS - TIPP '144.06.14 Central Au+Au@25AGeV UrQMD event Au+Au at 10 MHz interaction rate Up to 700 charged particles/evt Track densities up to 30 cm -2 /evt Need fast and radiation hard detectors as well as fast data acquisition system for online event selection

5 Silicon Tracking System 5 A. Lymanets - CO 2 Cooling for CBM STS - TIPP '144.06.14 2133k r/o channels 212 FEE blocks at 140 W (10 FEBs with 14 W each) + 60 W (HUB chip) FEE heat dissipation of 42.4 kW Total power dissipated by sensors after irradiation ~ 1 W  Convective cooling 212 FEE blocks 106 ladders 8 stations Cooling R&D: Open blown CO 2 system 1 kW CO 2 system TRACI-XL Plans for 50 kW system

6 Open CO 2 system 6 A. Lymanets - CO 2 Cooling for CBM STS - TIPP '144.06.14 Built to validate heat exchanger design. Currently commissioned and running.

7 Experimental setup 7 A. Lymanets - CO 2 Cooling for CBM STS - TIPP '144.06.14 Humidity sensor FEB box with heating elements Pressure sensors Chiller Induction coil Control panel

8 Heat exchanger studies 8 A. Lymanets - CO 2 Cooling for CBM STS - TIPP '144.06.14 FEM calculation (Solid Works) 200 W input power 1 mm thick fins 200 W heat load by resistors 1.8 m long tube with ø1.8 mm (optimal parameters) Obtain temperature distributions Check thermal contact Goal: optimize heat exchanger/cooling fins geometry. Guarantee thermal neutrality (-5 ˚C). Simulation studiesPrototype

9 Very first results 9 A. Lymanets - CO 2 Cooling for CBM STS - TIPP '144.06.14 P in input power P in : 0, 45, 80, 100, 140, 200 W liquid CO 2 input temperature T in : -40 °C nominal flow to neutralize 200 W: 1 g/s = 27 l n /min saturation temperature T HX is reached at flows > 15 l n /min T in T out T HeatExchanger

10 Very first results II 10 A. Lymanets - CO 2 Cooling for CBM STS - TIPP '144.06.14 32 °C36 °C42 °C38 °C32 °C 18 °C -34 °C Flow: 30 l n /s, input power: 200 W Much higher than -5 °C (not thermally neutral) probable cause: insufficient thermal contact between heat exchanger and FEB box

11 Simulations studies 11 A. Lymanets - CO 2 Cooling for CBM STS - TIPP '144.06.14 Fin widthall aluminumair gap (100 µm) thermal grease gap grease with Cu-FEB Box grease with all Cu 1 mm-7.0535.1-3.97-18.2-18.5 2 mm-21.424.7-18.3-26.2-26.6 3 mm-26.920.9-23.4-29-29.4 simulations confirm experimental observations good thermal coupling and wider fins (2 mm) should allow complete thermal neutralization experimental verification underway Temperature maximum

12 Simulations with detailed layout 12 A. Lymanets - CO 2 Cooling for CBM STS - TIPP '144.06.14 Temperature maximum °C fin widthall aluminumair gapthermal grease gap grease with Cu FEB box grease with all Cu 1 mm-5.0934.27.18-9.54-10 2 mm-11.423-8.92-20-20.5 3 mm-18.418.7-15.7-24.1-24.6 4 mm-22.815.8-20-26.8-27.3 realistic placement of heat sources suggests 2-3 mm fins

13 New measurements: improved thermal contact 13 A. Lymanets - CO 2 Cooling for CBM STS - TIPP '144.06.14

14 New measurements: T @ 100 W 14 A. Lymanets - CO 2 Cooling for CBM STS - TIPP '144.06.14 Flow: 20.5 ln/s, applied heat power: 100 W SolidWorks simulations predict -19.4 °C highest temperature in this regime -13.5 °C -11 °C -10 °C-15 °C -34 °C -40.3 °C Solidworks reproduces measurement trends correctly. Thermal neutrality is achieved with thicker fins.

15 Condensing unit: -Easily detachable -FU to adapt to different load situations Technical specifications -Power: 1kW @ -40 ⁰C -Power supply: three-phase -Weight almost 600 kg -Dimensions: 1132x1153x1900 -PLC controlled Technical specifications -Power: 1kW @ -40 ⁰C -Power supply: three-phase -Weight almost 600 kg -Dimensions: 1132x1153x1900 -PLC controlled 1132 1153 1900 Control cabinet: -2 Layer (HV + LV) -HMI for friendly User experience -GSI+Tübingen Transfer line to Remote control box + Experiment Top Exhaust: Extract pump + electronics heat CO 2 Front Panel: -Easy removable for maintenance -Armaflex foam insulated -Next slide Drip Pan: Tray to detect CO 2 leakages Aluminum profiles frame: Item profiles 8 40x40 mm With TRACI-XL you will be able to test 7 FEE blocks of 140 W For example ¼ Stations 4, 5 or 6  Thermal box is foreseen to have this size or maybe half station size with dummy loads instead the rest of blocks With TRACI-XL you will be able to test 7 FEE blocks of 140 W For example ¼ Stations 4, 5 or 6  Thermal box is foreseen to have this size or maybe half station size with dummy loads instead the rest of blocks TRACI-XL Main components

16 Commercial CO 2 power plant 16 A. Lymanets - CO 2 Cooling for CBM STS - TIPP '144.06.14 No oil-free setup needed No particular temperature stability requirement 50 kW externally cooled liquid CO 2 system with 1 kW standby power Company: Hafner-Muschler (http://www.hafner-muschler.de/)http://www.hafner-muschler.de/ System similar to CERN 2PACL principle with liquid CO 2 (not transcritical)

17 Conclusions A. Lymanets - CO 2 Cooling for CBM STS - TIPP '144.06.14 CO 2 based cooling system is required to cool 42 kW of power. Heat exchanger design has been optimized using simulation approach Verified by the measurements 1 kW TRACI-XL system is in production. Commissioning to start in July Industry partners identified for a final STS cooling system. 17

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