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ALICE PRR TRD COOLING P.Glässel, A.Marín, V.Petracek, J.Stachel, M.R.Stockmeier, J.P.Wessels. PRR of the TRD Cooling. The TRD detector in ALICE Cooling plant Heat generated by the detector Map of heat sources Routing of pipes Test measurements - PowerPoint PPT Presentation
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PRR TRD COOLING A. Marín (GSI) 7/01/2004
ALICE PRR TRD COOLINGALICE PRR TRD COOLING
P.Glässel, A.Marín, V.Petracek, J.Stachel, M.R.Stockmeier, J.P.WesselsP.Glässel, A.Marín, V.Petracek, J.Stachel, M.R.Stockmeier, J.P.Wessels
PRR TRD COOLING A. Marín (GSI) 7/01/2004
PRR of the TRD Cooling PRR of the TRD Cooling
The TRD detector in ALICE Cooling plant Heat generated by the detector Map of heat sources Routing of pipes Test measurements Construction and tests during assembly List of materials used
PRR TRD COOLING A. Marín (GSI) 7/01/2004
The TRD detector in ALICEThe TRD detector in ALICE
18 SuperModules in 30 chambers/SM in 6
layers
6/8 Readout Boards/ chamber
16 MCMs/RB
1.18x106 channels
TRD
RB24
RB26
PRR TRD COOLING A. Marín (GSI) 7/01/2004
Readout Board in a chamberReadout Board in a chamber
MCMsMCMs
Test room
Readout board TRD chamber
PRR TRD COOLING A. Marín (GSI) 7/01/2004
Map of heat sources in TRDMap of heat sources in TRD
Stack of chambers Readout board
PRR TRD COOLING A. Marín (GSI) 7/01/2004
Heat sources in TRD (I)Heat sources in TRD (I)
Source # Power (W) Amount Total Amount (SM)
Total Power per SM (W)
0 (VR) 0.21 2/RB 456 96
1 (VR) 0.88 2/RB 456 401
2 (VR) 0.066 2/RB 456 30
3 (VR) 0.352 2/RB 456 161
4 (VR) 0.009 1/RB 228 2
5 (VR) 0.044 1/RB 228 10
6 (MCM) 0.52 16/RB 3648 1897
7 (DCS) 5 1/chamber 30 150
8 (bars) 16 2/layer 12 192
The total dissipated power is ~ 53kW
PRR TRD COOLING A. Marín (GSI) 7/01/2004
The TRD cooling plant (CERN-ST/CV)The TRD cooling plant (CERN-ST/CV)
18 cooling circuits (1/SM) Inlet RB26/ Outlet RB24
1500L/h @ 16~20oC TRD supermodule
RB26 side RB24 side
Layout of Supply pipes around the TRD Cooling of one TRD super-module
PRR TRD COOLING A. Marín (GSI) 7/01/2004
The TRD cooling plant (CERN-ST/CV)The TRD cooling plant (CERN-ST/CV)
Flow rate: TRD: 18 1.5m3/h Total flow = 27 m3/h
Total heat to be removed: ~55kW
Total Volume of water in the installation: ~2000L
Range of available water temperature at the Heaters outlet:
Super-modules: 16~18ºC
Heaters
TRDSupply
manifold18 outlets
ThermalscreenSupply
manifold18 outlets
Mixed water
Compressedair
1500L/h @16~20oC
TRD supermodule
RB26 side RB24 side
300L/h @ 18~20oC
Thermal screen
Returnmanifold36 inlets
C
Mixed-bed
de-ionizer
PRR TRD COOLING A. Marín (GSI) 7/01/2004
Routing of services inside SMRouting of services inside SM
Main water supply in each layer: 250 l/h
Power bars: 16 W
PRR TRD COOLING A. Marín (GSI) 7/01/2004
Voltage regulators (VR)Voltage regulators (VR)
Temperature in VR test board seen by IR camera No cooling is applied
#1 #3 #1#3
PRR TRD COOLING A. Marín (GSI) 7/01/2004
VR: temperature profile (IR camera)VR: temperature profile (IR camera)
60 0 C reached without cooling
Size of VR:6x3mm2
PRR TRD COOLING A. Marín (GSI) 7/01/2004
Desing of Cooling PadsDesing of Cooling Pads
MCM: 0.520 W 40x40x0.4 mm3 Al pad (minimize radiation length) 2(3) mm inner (outer) diameter Al pipe of length ~ 9 cm 3M heat conductive tape (9890,5506)
PRR TRD COOLING A. Marín (GSI) 7/01/2004
Cooling meander Cooling meander
Cooling circuit across per SM) Type A: (#0)+8x(#6)+(#0)+(#1) = 5.45 W Type B: (#1)+(#2)+(#3)+(#4)+(#5)+8x(#6)+(#2)+(#3)+(#4)+
(#5)=5.9W Water flow : 3.4 l/h T=1.50C
PRR TRD COOLING A. Marín (GSI) 7/01/2004
Test cooling system, MCMTest cooling system, MCM
Tap water Needle valve Pressure meter
Readout boardMCM
Tin = 14.60C
Tout = 15.60C
TMCM = 21.30C 19.60C 20.50C
dTglob-top = 4.10C 3.20C 4.40C
PRR TRD COOLING A. Marín (GSI) 7/01/2004
Optimization VROptimization VR
foam(a) 2 Al pipes over VR
1 Al pipes touching RB (b) 1/2 Al pipes over VRHeat bridges
dTVR1 = 8.50C /9.30C dTVR3 = 4.40C
dTVR0 = 3.50C/5.40C
(a) (b)
PRR TRD COOLING A. Marín (GSI) 7/01/2004
IR cameraIR camera2 Al pipes over VR
1/2 Al pipes over VRHeat bridges
PRR TRD COOLING A. Marín (GSI) 7/01/2004
Long term test using VR setupLong term test using VR setup
Power dissipated: 5.2W (equivalent to a cooling meander) All pipes in series Air gap: 15 mm Good thermal insulation: pipes, air volume Pipes touching VR (no heat bridges), pipe over RB in both
sides
PRR TRD COOLING A. Marín (GSI) 7/01/2004
Results of long term testResults of long term test
Twater out=1.3-1.50C
expected 1.50C) Tair=6.70C
Tair stable over 4 days Heat on3.4-3 l/h
PRR TRD COOLING A. Marín (GSI) 7/01/2004
DCS cooling testDCS cooling test
Pipes over main heat dissipation components
FPGA/EPXA1 VR
Ethernet SDRAM
Flash
TTCrx
Tin = 18.70C Tout= 200C
TVR1 = 33.70CTVR2 = 35.80CTTTCrx= 33.70C TFPGA= 36.80C
Tair= 290CNew DCS ,VR in parallel!
PRR TRD COOLING A. Marín (GSI) 7/01/2004
Grounding schemeGrounding scheme
Cooling pipes along electrically insulated from electronics (MCM) and Supermodule
Cooling pipes along can be electrically insulated from cooling pads or electrically connected To be decided based on noise measurements
Possibility of connecting cooling pipes to RB (or SM) ground To be decided based on noise measurements
PRR TRD COOLING A. Marín (GSI) 7/01/2004
Assembly and testsAssembly and tests
1. Meander construction in a company2. Measure pressure drop in each meander3. Glue Al plates in each cooling meander. Electrically insulating material
between pipe and plate if needed for noise requirements.4. Put heat conductive tape on top of each component5. Glue cooling meanders to RB in a flat table using Al-filled epoxy.6. Inspect visually that all Al plates are touching the heat sources. Mark
each checked component.7. Power electronics and measure the temperature underneath each heat
source using a plate equipped with Pt100 at given positions.8. Check that all electronics is still working. Avoid damage during gluing9. Position the RB preequipped with cooling meanders in the chambers.
Connect the cooling meanders between the two RB and between RB and the main water supply using Viton connectors. Fix RB to chambers
10. Once every layer is fully equipped test for leak tightness by pumping with vacuum pump
PRR TRD COOLING A. Marín (GSI) 7/01/2004
Material usedMaterial used
1. Al tube of 2(3) mm inner (outer) diameter.
2. Al plates of 40x40x0.4 mm3
3. 3M tape (5506,9890) for thermal conductivity and electrical isolation
4. Al powder and epoxy