Module:
Power Supply:
Cooling unit:
Monitoring unit
Database: link
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:
PSU current / voltage requirement : 11 A / 8 V
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
version 1: List of components:
https://docs.google.com/spreadsheets/d/1dNT5ja_pFS2P6HJojZd5K-uXMyx7_lAjD4M-GH4URZ4/edit?usp=sharing
Apr 22 2021 List of component:
https://docs.google.com/spreadsheets/d/1BgjfFbXAt-ffoCWYGcLghxHP21pGV1TTFr1I7jS42yg/edit#gid=0
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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.
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
Triplet cooling unit assembly procedure (CERN box)
Quad cooling unit assembly procedure (CERN box)
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:
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.
Temperature sensor: pT100
Setting up SHT85
Connecting SHT85 to raspberry pi:
Setup:
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
Readout: RTD Data Acquisition Stackable Card for Raspberry Pi with Raspberry Pi
Firmware to control: https://github.com/SequentMicrosystems/rtd-rpi
For SHT85: https://github.com/jothanna/sht85/tree/master/sht85
connecting to the raspberry pi:
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)
Action when fail is to turn off the power of Peltier and module
There are two ThermoCube units in B84/TID cabinet. Unit #1 is with full tubing setup and regularly used by Gabriel Blaj for LCLS so that we are trying to use unit #2 (no tubing) by assembling similar tubing arrangement as unit #1. Unit #2 has different coolant connectors compared to unit #1, but the rest of the tubing can work the same way still.
Unit #2 Model | 10-400-3G20-1-CP2-R2-LT-AR |
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-400 | ~400W @ 20C with ambient air cooling for the Cube |
3G20 | >3 lpm @30 pig magnetic drive gear pump. Adjustable flow setting for 2 lpm. |
CP2 | 3/8" CPC shut off valve (1-3 lpm) |
R2 | RS232 interface controller |
LT | Low temperature operation (<5C) |
AR | Auto reset - software |
Coolant connector (3/8" CPC) on unit #2 | Connection to the filter for unit #1 | Unit #1 with Swagelock QC4-316 joint for application insertion |
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Thermo Cube: Chiller manual
We intend to use the ThermoCube recommended coolant Koolance 702 (27% propylene glyco + water mix): https://koolance.com/liq-702-liquid-coolant-bottle-high-performance-700ml-blue. Propylene glyco is a nicer substance (used as food additive in some cases) than the more commonly used ethylene glyco as an alternative antifreeze.
The ThermoCube tank is 300 ml but there may be some additional piping volume within chiller besides the 300ml. The tubing outside the chiller (not including filter) is <~200ml. So it may sufficiently safe if we get two 700ml bottles of the recommended Koolance 702. This unit description doesn’t say what type of cold plate it has. Stainless would have carried a tag ’S” in the model number somewhere so this may be old style anodized AL PCW plate ? Koolance claims to be friendly with both Al and SS.
Peltier TE-127-1.0-2.5:
Empty load step up | With Heater | with foam box |
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