Physics Department

Detector Technology

Department

Detector Technology GroupGroup

Pixel CO Cooling TestPixel CO2 Cooling Testg

24 April 2009 1João Noite PH-DT

M i PMain PurposesMain Purposes• Gain practical experience operating a simple CO2 cooling• Gain practical experience operating a simple CO2 cooling

circuit.circuit.

d b h d d l h h l f• Test detector tube with diameter and length that correctly fit g yin the pixel detector geometryin the pixel detector geometry.

• Measure the tube temperature along its length to determine• Measure the tube temperature along its length to determine the pressure drop.p p

Fi d th ti l bi ti f l th di t• Find the optimal combination of length, diameter, p gtemperature non-uniformity and material budgettemperature non-uniformity and material budget.

24 April 2009 2João Noite PH-DT

D C li T b RDetector Cooling Tube RequestsDetector Cooling Tube Requests

• The preferred cooling liquid temperature during• The preferred cooling liquid temperature during operation is around -12°C, which corresponds to aoperation is around 12 C, which corresponds to a

f 25 Bpressure of 25 Bar.

• The Pixel Barrel cooling tube is specified as ID=1 5 mm• The Pixel Barrel cooling tube is specified as ID=1.5 mm, wall thickness 50 microns.wall thickness 50 microns.

• Layer 1 of the Pixel detector dissipates 144 W over a y pcooling pipe length of 5 5 mcooling pipe length of 5.5 m.

24 April 2009 3João Noite PH-DT

CO C li T S S h iCO2 Cooling Test Setup SchematicsCO2 Cooling Test Setup Schematics

24 April 2009 João Noite PH-DT 4

CO C li T SCO2 Cooling Test SetupCO2 Cooling Test Setup

DataDataAcquisitionSystemy

Test ZoneTest Zone

CO2 Test Rack

24 April 2009 João Noite PH-DT 5

CO T R kCO2 Test RackCO2 Test RackConcentric Tube HeatTube Heat ExchangerExchanger

Mass Flow MeterMass Flow Meter Transmitter

CO2CO2 BottleBottle

Mass FlowMass Flow Meter SensorMeter Sensor

24 April 2009 João Noite PH-DT 6

CO T R kCO2 Test RackCO2 Test Rack

Water Bath HeaterHeater

Concentric Tube HeatTube Heat ExchangerExchanger

24 April 2009 João Noite PH-DT 7

T S PlTemperature Sensors PlacementTemperature Sensors Placement

PT100PT100 TemperatureSensors

Detector Tube ID = 1.4 mmID 1.4 mm

Insulation

24 April 2009 João Noite PH-DT 8

T STemperature SensorsTemperature Sensors

Heat ConductingHeat Conducting AdhesiveAdhesive

24 April 2009 João Noite PH-DT 9

T STemperature SensorsTemperature Sensors

Copper BlockBlock

TemperatureTemperature SensorSensor

24 April 2009 João Noite PH-DT 10

C Bl k T |PCopper Blocks – Temp|PowerCopper Blocks Temp|Power

SensorBlockBlock

PowerBlockBlock

24 April 2009 João Noite PH-DT 11

T ZTest ZoneTest Zone

24 April 2009 João Noite PH-DT 12

D A i i i SData Aquisition SystemData Aquisition System

24 April 2009 João Noite PH-DT 13

T L hTemperature vs LenghtTemperature vs Lenght-12[°C]

-12.5 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 [m]

-13

-13.5

-14

-14.5

-15

-15.5

-16

-16.5

-17

-17.5

-18

• Power = 144 WPower = 144 W• Mass Flow 1 g/s• Mass Flow = 1 g/sΔT 3 7°C• ΔT ≈ 3.7°C

• ΔP ≈ 2.5 Bar

24 April 2009 João Noite PH-DT 14

CO C li T N SCO2 Cooling Test Next StepsCO2 Cooling Test Next Steps

Tube testing using diferent conditions of:Tube testing using diferent conditions of:

• Mass Flow• Mass Flow

P• PowerPower

• Pressure• Pressure

• Tube GeometryTube Geometry

24 April 2009 João Noite PH-DT 15

l dSpare SlidesSpare Slidesp

24 April 2009 João Noite PH-DT 16

h Dip-h Diagramp-h Diagram

HEXHEX

r]e

[Bar

ress

ure

Pr

Detector Water Bath HeaterHEX

Enthalpy [KJ/Kg]

24 April 2009 João Noite PH-DT 17

C i T b H E hConcentric Tube Heat ExchangerConcentric Tube Heat Exchanger

24 April 2009 João Noite PH-DT 18

W B h HWater Bath HeaterWater Bath Heater

24 April 2009 João Noite PH-DT 19