The ITk pixel module cooling Twiki page is the main source for the common information. This page captures the local module cooling setup information at the SLAC Integration site. A talk by Magne Lauritzen (Jul/7/2020) has some updated status and additional pictures.
Equipment recommendation:
cooling:
- TIM: Panasonic EYG-S0909ZLX2 thermal resistance: 12.5 mK/W
- peltier:
- TEC 1 : Laird 108161050003 TEC 2 : Laird 387004685
- parallel connecting
PSU current / voltage requirement : 11 A / 8 V
- Coolant : 70% water, 30% ethylene glycol
- Coolant Temperature : -10C
- Dry air : 1.5L/min
chiller requirements: capacity > 385 W
System Test Description from Bologna: [can check this details: for Peltier and chiller need to check]
Similar settings are shown here presented by Argonne: link slide6 link2
Equipment setup:
power supply:
current / voltage: 0-10A / 0-32V
Wiener Mpod (2channel, HV/LV)
Rohde and Schwarz HMP4040
Monitoring:
Temperature: NTC
Humidity (inside cooling unit): SHT85, (+/- %RH and +/- 0.1 C)
Humidity (inside cold box): Thorlabs TSP01 (+/- accuracy)
Arduino Mega 2560
Cooling:
Cooling unit: qual cooling unit v5
Chiller: Julabo HL CF41
Coolant: 100% silicone oil
Dry, room temperature nitrogen
Room temperature vacuum
TIM sheet: Panasonic EYG-S0909LZX2
TEC combination:
TEC 1: Larid 1081611050003
TEC 2: Larid 387004685
Components :
List of components: https://docs.google.com/spreadsheets/d/1dNT5ja_pFS2P6HJojZd5K-uXMyx7_lAjD4M-GH4URZ4/edit?usp=sharing
Quad Cooling Unit Component Collection Status
Shipment from Bergen (received)
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Shipment from CERN
The following items are listed by names and counts from each box of the entire package from CERN. For example, there are 6 POM base plates in total, but they came as sets of there in two separate boxes. Pictures will come soon.
- Data cables for triplets RD53a ITk Pixel (x3)
- POM base plates (x3)
- POM base plates (x3) + coldplates for triplets "linear type" (x3) + vacuum chucks (x3)
- Triplet adapter cards RD53a ITk Pixel (x6)
- Plastic screws: RENY; NYLON M3x35, M3x25, M3x40, washers (check count for all the items) + coldplates for triplets "ring type" (x3)
- Foam insulation sets: Linear type (x3), Ring type (x3), presumably Quad V0.4 (exact type is not labeled, actual purpose to be checked) (x2)
- 25m coolant tubes
- 5m dry air / vacuum tubes
They're being shipped from CERN 12/11 https://edh.cern.ch/Document/8559982 together with the Triplet Cooling unit.
Some notes from Saverio:
-- M6 bolt are 10/32 - we need to find more here.
-- The coolant tube is slightly shorter
-- There are spares for all the screw types and the vacuum chucks rubber pads have been already cut
Items to be acquired by INT site
- Peltier devices (see the summary of this presentation for recommendations and page 13 for the list of alternatives):
- Option 1 (tested in Bergen, 2-stage TEC): Module 1 and Module 2 (one of each per cooling unit).
- Option 2 (a single Peltier device, not yet tested): SKCM-240-11-T100-NS-TF00-ALO(Qmax 73 W) [* Q=73W is for hot side at 27 C]
- Option 3 (a single Peltier device, not yet tested): Kryotherm TB-2-(199-199)-0.8 (Qmax 95 W)
- Panasonic EYGS0909ZLX2 TIM sheets (2 sheets 4x4cm2 per cooling unit)
- Temperature sensors (NTC or PT100s, see assembly manual)
Assembly Manuals
Triplet cooling unit assembly procedure (CERN box)
Quad cooling unit assembly procedure (CERN box)
Operation Instructions
E-mail from Magne Lautitzen to atlas-itk-pixel-modules-TestSystem (Oct/26/2020):
To operate the cooling unit, you will need the following infrastructure:
- Vacuum source
- Dry air or nitrogen source
- Circulating chiller
- Peltier power supply and/or controller
The amount of dry air or nitrogen needed to maintain a dry atmosphere in the cooling unit will depend on the humidity in your lab and the lowest temperature you want to reach on the module. A ballpark figure is 1.5L/min at -25C.
The circulating chiller must have a cooling capacity that depends on how cold you need to take the modules. See page 13 on this presentation for recommendations for reaching -55C.
For stable temperature control of the modules, you will need a peltier controller. I have been successfully using the Meerstetter 1089.
To avoid condensation on the peltier devices, you must maintain a dry atmosphere in the cooling unit whenever there is coolant flowing through the coldplate. If condensation forms on the peltier devices, it will degrade the performance of the cooling unit because ice and water is an excellent conductor of heat. Getting rid of this condensation requires a long term “bakeout” of the coldstack and is best avoided.
Setup for preliminary cooling test
- cooling unit: from Marco
- 2 moisture sensor (SHT85 and the DHT22) [sensor interface using I2C]
- 4 RTD
- Interlock
- Overheating = the chiller fails and the PS keep running
- temperature on the cold plate
- Condensation = Dry air fails, moisture condense and destroys the device
- dew point < air temperature
- module temperature drop ←55C
- communication => fail safe
- Overheating = the chiller fails and the PS keep running
Check Equipments we have
Thermo Cube: Chiller manual
* CPC Quick disconnects are attached with chiller, need some coupling insert to connect to our tube (ID ~8mm/ OD ~11mm)
* options we have to are in this link (but seem no 1/4 in option)
Peltier TE-127-1.0-2.5:
Empty load step up
Power supply: bk precision power supply 9130
Peltier: Peltier TE-127-1.0-2.5
Temperature sensor: pT100
Readout: RTD Data Acquisition Stackable Card for Raspberry Pi with Raspberry Pi
Firmware to control: https://github.com/SequentMicrosystems/rtd-rpi
connecting to the raspberry pi:
- connecting to the rddev111
- ssh pi@192.168.4.122
- password: slac-dcs-cooling
Readout RTD database:http://atlascr.slac.stanford.edu:3000/d/AhqDEQ_Mk/dcs-cooling-tests?orgId=1&from=1619033502000&to=now&refresh=1m
(login atlas/atlas)
Setting up SHT85
Connecting SHT85 to raspberry pi:
PI to SHT85 (datasheet)
pin 1 3.3V. to 2 VDD
pin 3 SDA to 4 SDA Serial data
pin 5 SCL to 1 SCL Serial clock
pin 9: ground to 3 VSS Ground