Detector Technology Group

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Presentation transcript:

Detector Technology Group Physics Department Detector Technology Group Pixel CO2 Cooling Test 7 November 2018 João Noite PH-DT

Main Purposes Gain practical experience operating a simple CO2 cooling circuit. Test detector tube with diameter and length that correctly fit in the pixel detector geometry. Measure the tube temperature along its length to determine the pressure drop. Find the optimal combination of length, diameter, temperature non-uniformity and material budget. 7 November 2018 João Noite PH-DT

Detector Cooling Tube Requests The preferred cooling liquid temperature during operation is around -12°C, which corresponds to a pressure of 25 Bar. The Pixel Barrel cooling tube is specified as ID=1.5 mm, wall thickness 50 microns. Layer 1 of the Pixel detector dissipates 144 W over a cooling pipe length of 5.5 m. 7 November 2018 João Noite PH-DT

CO2 Cooling Test Setup Schematics 7 November 2018 João Noite PH-DT

CO2 Cooling Test Setup Data Acquisition System Test Zone CO2 Test Rack 7 November 2018 João Noite PH-DT

CO2 Test Rack Concentric Tube Heat Exchanger Mass Flow Meter Transmitter CO2 Bottle Mass Flow Meter Sensor 7 November 2018 João Noite PH-DT

CO2 Test Rack Water Bath Heater Concentric Tube Heat Exchanger 7 November 2018 João Noite PH-DT

Temperature Sensors Placement PT100 Temperature Sensors Detector Tube ID = 1.4 mm Insulation 7 November 2018 João Noite PH-DT

Temperature Sensors Heat Conducting Adhesive 7 November 2018 João Noite PH-DT

Temperature Sensors Copper Block Temperature Sensor 7 November 2018 João Noite PH-DT

Copper Blocks – Temp|Power Sensor Block Power Block 7 November 2018 João Noite PH-DT

Test Zone 7 November 2018 João Noite PH-DT

Data Aquisition System 7 November 2018 João Noite PH-DT

Temperature vs Lenght Power = 144 W Mass Flow = 1 g/s ΔT ≈ 3.7°C ΔP ≈ 2.5 Bar 7 November 2018 João Noite PH-DT

CO2 Cooling Test Next Steps Tube testing using diferent conditions of: Mass Flow Power Pressure Tube Geometry 7 November 2018 João Noite PH-DT

Spare Slides 7 November 2018 João Noite PH-DT

p-h Diagram 7 November 2018 João Noite PH-DT HEX Detector HEX Pressure [Bar] Detector HEX Water Bath Heater Enthalpy [KJ/Kg] 7 November 2018 João Noite PH-DT

Concentric Tube Heat Exchanger 7 November 2018 João Noite PH-DT

Water Bath Heater 7 November 2018 João Noite PH-DT